gopkg.in/ubuntu-core/snappy.v0@v0.0.0-20210902073436-25a8614f10a6/overlord/assertstate/assertstate_test.go

// -*- Mode: Go; indent-tabs-mode: t -*-

/*
 * Copyright (C) 2016-2021 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package assertstate_test

import (
	"bytes"
	"context"
	"crypto"
	"errors"
	"fmt"
	"io/ioutil"
	"path/filepath"
	"sort"
	"strings"
	"testing"
	"time"

	"golang.org/x/crypto/sha3"
	. "gopkg.in/check.v1"

	"github.com/snapcore/snapd/asserts"
	"github.com/snapcore/snapd/asserts/assertstest"
	"github.com/snapcore/snapd/asserts/snapasserts"
	"github.com/snapcore/snapd/asserts/sysdb"
	"github.com/snapcore/snapd/dirs"
	"github.com/snapcore/snapd/httputil"
	"github.com/snapcore/snapd/logger"
	"github.com/snapcore/snapd/overlord"
	"github.com/snapcore/snapd/overlord/assertstate"
	"github.com/snapcore/snapd/overlord/auth"
	"github.com/snapcore/snapd/overlord/snapstate"
	"github.com/snapcore/snapd/overlord/snapstate/snapstatetest"
	"github.com/snapcore/snapd/overlord/state"
	"github.com/snapcore/snapd/snap"
	"github.com/snapcore/snapd/snap/snaptest"
	"github.com/snapcore/snapd/store"
	"github.com/snapcore/snapd/store/storetest"
	"github.com/snapcore/snapd/testutil"
)

func TestAssertManager(t *testing.T) { TestingT(t) }

type assertMgrSuite struct {
	testutil.BaseTest

	o     *overlord.Overlord
	state *state.State
	se    *overlord.StateEngine
	mgr   *assertstate.AssertManager

	storeSigning *assertstest.StoreStack
	dev1Acct     *asserts.Account
	dev1AcctKey  *asserts.AccountKey
	dev1Signing  *assertstest.SigningDB

	fakeStore        snapstate.StoreService
	trivialDeviceCtx snapstate.DeviceContext
}

var _ = Suite(&assertMgrSuite{})

type fakeStore struct {
	storetest.Store
	state                           *state.State
	db                              asserts.RODatabase
	maxDeclSupportedFormat          int
	maxValidationSetSupportedFormat int

	requestedTypes [][]string
	opts           *store.RefreshOptions

	snapActionErr         error
	downloadAssertionsErr error
}

func (sto *fakeStore) pokeStateLock() {
	// the store should be called without the state lock held. Try
	// to acquire it.
	sto.state.Lock()
	sto.state.Unlock()
}

func (sto *fakeStore) Assertion(assertType *asserts.AssertionType, key []string, _ *auth.UserState) (asserts.Assertion, error) {
	sto.pokeStateLock()

	restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, sto.maxDeclSupportedFormat)
	defer restore()

	ref := &asserts.Ref{Type: assertType, PrimaryKey: key}
	return ref.Resolve(sto.db.Find)
}

func (sto *fakeStore) SnapAction(_ context.Context, currentSnaps []*store.CurrentSnap, actions []*store.SnapAction, assertQuery store.AssertionQuery, user *auth.UserState, opts *store.RefreshOptions) ([]store.SnapActionResult, []store.AssertionResult, error) {
	sto.pokeStateLock()

	if len(currentSnaps) != 0 || len(actions) != 0 {
		panic("only assertion query supported")
	}

	toResolve, toResolveSeq, err := assertQuery.ToResolve()
	if err != nil {
		return nil, nil, err
	}

	if sto.snapActionErr != nil {
		return nil, nil, sto.snapActionErr
	}

	sto.opts = opts

	restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, sto.maxDeclSupportedFormat)
	defer restore()

	restoreSeq := asserts.MockMaxSupportedFormat(asserts.ValidationSetType, sto.maxValidationSetSupportedFormat)
	defer restoreSeq()

	reqTypes := make(map[string]bool)
	ares := make([]store.AssertionResult, 0, len(toResolve)+len(toResolveSeq))
	for g, ats := range toResolve {
		urls := make([]string, 0, len(ats))
		for _, at := range ats {
			reqTypes[at.Ref.Type.Name] = true
			a, err := at.Ref.Resolve(sto.db.Find)
			if err != nil {
				assertQuery.AddError(err, &at.Ref)
				continue
			}
			if a.Revision() > at.Revision {
				urls = append(urls, fmt.Sprintf("/assertions/%s", at.Unique()))
			}
		}
		ares = append(ares, store.AssertionResult{
			Grouping:   asserts.Grouping(g),
			StreamURLs: urls,
		})
	}

	for g, ats := range toResolveSeq {
		urls := make([]string, 0, len(ats))
		for _, at := range ats {
			reqTypes[at.Type.Name] = true
			var a asserts.Assertion
			headers, err := asserts.HeadersFromSequenceKey(at.Type, at.SequenceKey)
			if err != nil {
				return nil, nil, err
			}
			if !at.Pinned {
				a, err = sto.db.FindSequence(at.Type, headers, -1, asserts.ValidationSetType.MaxSupportedFormat())
			} else {
				a, err = at.Resolve(sto.db.Find)
			}
			if err != nil {
				assertQuery.AddSequenceError(err, at)
				continue
			}
			storeVs := a.(*asserts.ValidationSet)
			if storeVs.Sequence() > at.Sequence || (storeVs.Sequence() == at.Sequence && storeVs.Revision() >= at.Revision) {
				urls = append(urls, fmt.Sprintf("/assertions/%s/%s", a.Type().Name, strings.Join(a.At().PrimaryKey, "/")))
			}
		}
		ares = append(ares, store.AssertionResult{
			Grouping:   asserts.Grouping(g),
			StreamURLs: urls,
		})
	}

	// behave like the actual SnapAction if there are no results
	if len(ares) == 0 {
		return nil, ares, &store.SnapActionError{
			NoResults: true,
		}
	}

	typeNames := make([]string, 0, len(reqTypes))
	for k := range reqTypes {
		typeNames = append(typeNames, k)
	}
	sort.Strings(typeNames)
	sto.requestedTypes = append(sto.requestedTypes, typeNames)

	return nil, ares, nil
}

func (sto *fakeStore) DownloadAssertions(urls []string, b *asserts.Batch, user *auth.UserState) error {
	sto.pokeStateLock()

	if sto.downloadAssertionsErr != nil {
		return sto.downloadAssertionsErr
	}

	resolve := func(ref *asserts.Ref) (asserts.Assertion, error) {
		restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, sto.maxDeclSupportedFormat)
		defer restore()

		restoreSeq := asserts.MockMaxSupportedFormat(asserts.ValidationSetType, sto.maxValidationSetSupportedFormat)
		defer restoreSeq()
		return ref.Resolve(sto.db.Find)
	}

	for _, u := range urls {
		comps := strings.Split(u, "/")

		if len(comps) < 4 {
			return fmt.Errorf("cannot use URL: %s", u)
		}

		assertType := asserts.Type(comps[2])
		key := comps[3:]
		ref := &asserts.Ref{Type: assertType, PrimaryKey: key}
		a, err := resolve(ref)
		if err != nil {
			return err
		}
		if err := b.Add(a); err != nil {
			return err
		}
	}

	return nil
}

var (
	dev1PrivKey, _ = assertstest.GenerateKey(752)
)

func (s *assertMgrSuite) SetUpTest(c *C) {
	dirs.SetRootDir(c.MkDir())

	s.storeSigning = assertstest.NewStoreStack("can0nical", nil)
	s.AddCleanup(sysdb.InjectTrusted(s.storeSigning.Trusted))

	s.dev1Acct = assertstest.NewAccount(s.storeSigning, "developer1", nil, "")
	err := s.storeSigning.Add(s.dev1Acct)
	c.Assert(err, IsNil)

	// developer signing
	s.dev1AcctKey = assertstest.NewAccountKey(s.storeSigning, s.dev1Acct, nil, dev1PrivKey.PublicKey(), "")
	err = s.storeSigning.Add(s.dev1AcctKey)
	c.Assert(err, IsNil)

	s.dev1Signing = assertstest.NewSigningDB(s.dev1Acct.AccountID(), dev1PrivKey)

	s.o = overlord.Mock()
	s.state = s.o.State()
	s.se = s.o.StateEngine()
	mgr, err := assertstate.Manager(s.state, s.o.TaskRunner())
	c.Assert(err, IsNil)
	s.mgr = mgr
	s.o.AddManager(s.mgr)

	s.o.AddManager(s.o.TaskRunner())

	s.fakeStore = &fakeStore{
		state: s.state,
		db:    s.storeSigning,
		// leave this comment to keep old gofmt happy
		maxDeclSupportedFormat:          asserts.SnapDeclarationType.MaxSupportedFormat(),
		maxValidationSetSupportedFormat: asserts.ValidationSetType.MaxSupportedFormat(),
	}
	s.trivialDeviceCtx = &snapstatetest.TrivialDeviceContext{
		CtxStore: s.fakeStore,
	}
}

func (s *assertMgrSuite) TestDB(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	db := assertstate.DB(s.state)
	c.Check(db, FitsTypeOf, (*asserts.Database)(nil))
}

func (s *assertMgrSuite) TestAdd(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// prereq store key
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)

	db := assertstate.DB(s.state)
	devAcct, err := db.Find(asserts.AccountType, map[string]string{
		"account-id": s.dev1Acct.AccountID(),
	})
	c.Assert(err, IsNil)
	c.Check(devAcct.(*asserts.Account).Username(), Equals, "developer1")
}

func (s *assertMgrSuite) TestAddBatch(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	b := &bytes.Buffer{}
	enc := asserts.NewEncoder(b)
	// wrong order is ok
	err := enc.Encode(s.dev1Acct)
	c.Assert(err, IsNil)
	enc.Encode(s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	batch := asserts.NewBatch(nil)
	refs, err := batch.AddStream(b)
	c.Assert(err, IsNil)
	c.Check(refs, DeepEquals, []*asserts.Ref{
		{Type: asserts.AccountType, PrimaryKey: []string{s.dev1Acct.AccountID()}},
		{Type: asserts.AccountKeyType, PrimaryKey: []string{s.storeSigning.StoreAccountKey("").PublicKeyID()}},
	})

	// noop
	err = batch.Add(s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	err = assertstate.AddBatch(s.state, batch, nil)
	c.Assert(err, IsNil)

	db := assertstate.DB(s.state)
	devAcct, err := db.Find(asserts.AccountType, map[string]string{
		"account-id": s.dev1Acct.AccountID(),
	})
	c.Assert(err, IsNil)
	c.Check(devAcct.(*asserts.Account).Username(), Equals, "developer1")
}

func (s *assertMgrSuite) TestAddBatchPartial(c *C) {
	// Commit does add any successful assertion until the first error
	s.state.Lock()
	defer s.state.Unlock()

	// store key already present
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	batch := asserts.NewBatch(nil)

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	err = batch.Add(snapDeclFoo)
	c.Assert(err, IsNil)
	err = batch.Add(s.dev1Acct)
	c.Assert(err, IsNil)

	// too old
	rev := 1
	headers := map[string]interface{}{
		"snap-id":       "foo-id",
		"snap-sha3-384": makeDigest(rev),
		"snap-size":     fmt.Sprintf("%d", len(fakeSnap(rev))),
		"snap-revision": fmt.Sprintf("%d", rev),
		"developer-id":  s.dev1Acct.AccountID(),
		"timestamp":     time.Time{}.Format(time.RFC3339),
	}
	snapRev, err := s.storeSigning.Sign(asserts.SnapRevisionType, headers, nil, "")
	c.Assert(err, IsNil)

	err = batch.Add(snapRev)
	c.Assert(err, IsNil)

	err = assertstate.AddBatch(s.state, batch, nil)
	c.Check(err, ErrorMatches, `(?ms).*validity.*`)

	// snap-declaration was added anyway
	_, err = assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestAddBatchPrecheckPartial(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// store key already present
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	batch := asserts.NewBatch(nil)

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	err = batch.Add(snapDeclFoo)
	c.Assert(err, IsNil)
	err = batch.Add(s.dev1Acct)
	c.Assert(err, IsNil)

	// too old
	rev := 1
	headers := map[string]interface{}{
		"snap-id":       "foo-id",
		"snap-sha3-384": makeDigest(rev),
		"snap-size":     fmt.Sprintf("%d", len(fakeSnap(rev))),
		"snap-revision": fmt.Sprintf("%d", rev),
		"developer-id":  s.dev1Acct.AccountID(),
		"timestamp":     time.Time{}.Format(time.RFC3339),
	}
	snapRev, err := s.storeSigning.Sign(asserts.SnapRevisionType, headers, nil, "")
	c.Assert(err, IsNil)

	err = batch.Add(snapRev)
	c.Assert(err, IsNil)

	err = assertstate.AddBatch(s.state, batch, &asserts.CommitOptions{
		Precheck: true,
	})
	c.Check(err, ErrorMatches, `(?ms).*validity.*`)

	// nothing was added
	_, err = assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)
}

func (s *assertMgrSuite) TestAddBatchPrecheckHappy(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// store key already present
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	batch := asserts.NewBatch(nil)

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	err = batch.Add(snapDeclFoo)
	c.Assert(err, IsNil)
	err = batch.Add(s.dev1Acct)
	c.Assert(err, IsNil)

	rev := 1
	revDigest := makeDigest(rev)
	headers := map[string]interface{}{
		"snap-id":       "foo-id",
		"snap-sha3-384": revDigest,
		"snap-size":     fmt.Sprintf("%d", len(fakeSnap(rev))),
		"snap-revision": fmt.Sprintf("%d", rev),
		"developer-id":  s.dev1Acct.AccountID(),
		"timestamp":     time.Now().Format(time.RFC3339),
	}
	snapRev, err := s.storeSigning.Sign(asserts.SnapRevisionType, headers, nil, "")
	c.Assert(err, IsNil)

	err = batch.Add(snapRev)
	c.Assert(err, IsNil)

	err = assertstate.AddBatch(s.state, batch, &asserts.CommitOptions{
		Precheck: true,
	})
	c.Assert(err, IsNil)

	_, err = assertstate.DB(s.state).Find(asserts.SnapRevisionType, map[string]string{
		"snap-sha3-384": revDigest,
	})
	c.Check(err, IsNil)
}

func fakeSnap(rev int) []byte {
	fake := fmt.Sprintf("hsqs________________%d", rev)
	return []byte(fake)
}

func fakeHash(rev int) []byte {
	h := sha3.Sum384(fakeSnap(rev))
	return h[:]
}

func makeDigest(rev int) string {
	d, err := asserts.EncodeDigest(crypto.SHA3_384, fakeHash(rev))
	if err != nil {
		panic(err)
	}
	return string(d)
}

func (s *assertMgrSuite) prereqSnapAssertions(c *C, revisions ...int) {
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "snap-id-1",
		"snap-name":    "foo",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
	}
	snapDecl, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDecl)
	c.Assert(err, IsNil)

	for _, rev := range revisions {
		headers = map[string]interface{}{
			"snap-id":       "snap-id-1",
			"snap-sha3-384": makeDigest(rev),
			"snap-size":     fmt.Sprintf("%d", len(fakeSnap(rev))),
			"snap-revision": fmt.Sprintf("%d", rev),
			"developer-id":  s.dev1Acct.AccountID(),
			"timestamp":     time.Now().Format(time.RFC3339),
		}
		snapRev, err := s.storeSigning.Sign(asserts.SnapRevisionType, headers, nil, "")
		c.Assert(err, IsNil)
		err = s.storeSigning.Add(snapRev)
		c.Assert(err, IsNil)
	}
}

func (s *assertMgrSuite) TestDoFetch(c *C) {
	s.prereqSnapAssertions(c, 10)

	s.state.Lock()
	defer s.state.Unlock()

	ref := &asserts.Ref{
		Type:       asserts.SnapRevisionType,
		PrimaryKey: []string{makeDigest(10)},
	}

	err := assertstate.DoFetch(s.state, 0, s.trivialDeviceCtx, func(f asserts.Fetcher) error {
		return f.Fetch(ref)
	})
	c.Assert(err, IsNil)

	snapRev, err := ref.Resolve(assertstate.DB(s.state).Find)
	c.Assert(err, IsNil)
	c.Check(snapRev.(*asserts.SnapRevision).SnapRevision(), Equals, 10)
}

func (s *assertMgrSuite) TestFetchIdempotent(c *C) {
	s.prereqSnapAssertions(c, 10, 11)

	s.state.Lock()
	defer s.state.Unlock()

	ref := &asserts.Ref{
		Type:       asserts.SnapRevisionType,
		PrimaryKey: []string{makeDigest(10)},
	}
	fetching := func(f asserts.Fetcher) error {
		return f.Fetch(ref)
	}

	err := assertstate.DoFetch(s.state, 0, s.trivialDeviceCtx, fetching)
	c.Assert(err, IsNil)

	ref = &asserts.Ref{
		Type:       asserts.SnapRevisionType,
		PrimaryKey: []string{makeDigest(11)},
	}

	err = assertstate.DoFetch(s.state, 0, s.trivialDeviceCtx, fetching)
	c.Assert(err, IsNil)

	snapRev, err := ref.Resolve(assertstate.DB(s.state).Find)
	c.Assert(err, IsNil)
	c.Check(snapRev.(*asserts.SnapRevision).SnapRevision(), Equals, 11)
}

func (s *assertMgrSuite) settle(c *C) {
	err := s.o.Settle(5 * time.Second)
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestFetchUnsupportedUpdateIgnored(c *C) {
	// ATM in principle we ignore updated assertions with unsupported formats
	// NB: this scenario can only happen if there is a bug
	// we ask the store to filter what is returned by max supported format!
	restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, 111)
	defer restore()

	logbuf, restore := logger.MockLogger()
	defer restore()

	snapDeclFoo0 := s.snapDecl(c, "foo", nil)

	s.state.Lock()
	defer s.state.Unlock()
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo0)
	c.Assert(err, IsNil)

	var snapDeclFoo1 *asserts.SnapDeclaration
	(func() {
		restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, 999)
		defer restore()
		snapDeclFoo1 = s.snapDecl(c, "foo", map[string]interface{}{
			"format":   "999",
			"revision": "1",
		})
	})()
	c.Check(snapDeclFoo1.Revision(), Equals, 1)

	ref := &asserts.Ref{
		Type:       asserts.SnapDeclarationType,
		PrimaryKey: []string{"16", "foo-id"},
	}
	fetching := func(f asserts.Fetcher) error {
		return f.Fetch(ref)
	}

	s.fakeStore.(*fakeStore).maxDeclSupportedFormat = 999
	err = assertstate.DoFetch(s.state, 0, s.trivialDeviceCtx, fetching)
	// no error and the old one was kept
	c.Assert(err, IsNil)
	snapDecl, err := ref.Resolve(assertstate.DB(s.state).Find)
	c.Assert(err, IsNil)
	c.Check(snapDecl.Revision(), Equals, 0)

	// we log the issue
	c.Check(logbuf.String(), testutil.Contains, `Cannot update assertion snap-declaration (foo-id;`)
}

func (s *assertMgrSuite) TestFetchUnsupportedError(c *C) {
	// NB: this scenario can only happen if there is a bug
	// we ask the store to filter what is returned by max supported format!

	restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, 111)
	defer restore()

	s.state.Lock()
	defer s.state.Unlock()

	var snapDeclFoo1 *asserts.SnapDeclaration
	(func() {
		restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, 999)
		defer restore()
		snapDeclFoo1 = s.snapDecl(c, "foo", map[string]interface{}{
			"format":   "999",
			"revision": "1",
		})
	})()
	c.Check(snapDeclFoo1.Revision(), Equals, 1)

	ref := &asserts.Ref{
		Type:       asserts.SnapDeclarationType,
		PrimaryKey: []string{"16", "foo-id"},
	}
	fetching := func(f asserts.Fetcher) error {
		return f.Fetch(ref)
	}

	s.fakeStore.(*fakeStore).maxDeclSupportedFormat = 999
	err := assertstate.DoFetch(s.state, 0, s.trivialDeviceCtx, fetching)
	c.Check(err, ErrorMatches, `(?s).*proposed "snap-declaration" assertion has format 999 but 111 is latest supported.*`)
}

func (s *assertMgrSuite) setModel(model *asserts.Model) {
	deviceCtx := &snapstatetest.TrivialDeviceContext{
		DeviceModel: model,
		CtxStore:    s.fakeStore,
	}
	s.AddCleanup(snapstatetest.MockDeviceContext(deviceCtx))
	s.state.Set("seeded", true)
}

func (s *assertMgrSuite) setupModelAndStore(c *C) *asserts.Store {
	// setup a model and store assertion
	a := assertstest.FakeAssertion(map[string]interface{}{
		"type":         "model",
		"authority-id": "my-brand",
		"series":       "16",
		"brand-id":     "my-brand",
		"model":        "my-model",
		"architecture": "amd64",
		"store":        "my-brand-store",
		"gadget":       "gadget",
		"kernel":       "krnl",
	})
	s.setModel(a.(*asserts.Model))

	a, err := s.storeSigning.Sign(asserts.StoreType, map[string]interface{}{
		"authority-id": s.storeSigning.AuthorityID,
		"operator-id":  s.storeSigning.AuthorityID,
		"store":        "my-brand-store",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	return a.(*asserts.Store)
}

func (s *assertMgrSuite) TestValidateSnap(c *C) {
	s.prereqSnapAssertions(c, 10)

	tempdir := c.MkDir()
	snapPath := filepath.Join(tempdir, "foo.snap")
	err := ioutil.WriteFile(snapPath, fakeSnap(10), 0644)
	c.Assert(err, IsNil)

	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err = s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	chg := s.state.NewChange("install", "...")
	t := s.state.NewTask("validate-snap", "Fetch and check snap assertions")
	snapsup := snapstate.SnapSetup{
		SnapPath: snapPath,
		UserID:   0,
		SideInfo: &snap.SideInfo{
			RealName: "foo",
			SnapID:   "snap-id-1",
			Revision: snap.R(10),
		},
	}
	t.Set("snap-setup", snapsup)
	chg.AddTask(t)

	s.state.Unlock()
	defer s.se.Stop()
	s.settle(c)
	s.state.Lock()

	c.Assert(chg.Err(), IsNil)

	snapRev, err := assertstate.DB(s.state).Find(asserts.SnapRevisionType, map[string]string{
		"snap-id":       "snap-id-1",
		"snap-sha3-384": makeDigest(10),
	})
	c.Assert(err, IsNil)
	c.Check(snapRev.(*asserts.SnapRevision).SnapRevision(), Equals, 10)

	// store assertion was also fetched
	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestValidateSnapStoreNotFound(c *C) {
	s.prereqSnapAssertions(c, 10)

	tempdir := c.MkDir()
	snapPath := filepath.Join(tempdir, "foo.snap")
	err := ioutil.WriteFile(snapPath, fakeSnap(10), 0644)
	c.Assert(err, IsNil)

	s.state.Lock()
	defer s.state.Unlock()

	// have a model and store but store assertion is not made available
	s.setupModelAndStore(c)

	chg := s.state.NewChange("install", "...")
	t := s.state.NewTask("validate-snap", "Fetch and check snap assertions")
	snapsup := snapstate.SnapSetup{
		SnapPath: snapPath,
		UserID:   0,
		SideInfo: &snap.SideInfo{
			RealName: "foo",
			SnapID:   "snap-id-1",
			Revision: snap.R(10),
		},
	}
	t.Set("snap-setup", snapsup)
	chg.AddTask(t)

	s.state.Unlock()
	defer s.se.Stop()
	s.settle(c)
	s.state.Lock()

	c.Assert(chg.Err(), IsNil)

	snapRev, err := assertstate.DB(s.state).Find(asserts.SnapRevisionType, map[string]string{
		"snap-id":       "snap-id-1",
		"snap-sha3-384": makeDigest(10),
	})
	c.Assert(err, IsNil)
	c.Check(snapRev.(*asserts.SnapRevision).SnapRevision(), Equals, 10)

	// store assertion was not found and ignored
	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)
}

func (s *assertMgrSuite) TestValidateSnapMissingSnapSetup(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	chg := s.state.NewChange("install", "...")
	t := s.state.NewTask("validate-snap", "Fetch and check snap assertions")
	chg.AddTask(t)

	s.state.Unlock()
	defer s.se.Stop()
	s.settle(c)
	s.state.Lock()

	c.Assert(chg.Err(), ErrorMatches, `(?s).*internal error: cannot obtain snap setup: no state entry for key.*`)
}

func (s *assertMgrSuite) TestValidateSnapNotFound(c *C) {
	tempdir := c.MkDir()
	snapPath := filepath.Join(tempdir, "foo.snap")
	err := ioutil.WriteFile(snapPath, fakeSnap(33), 0644)
	c.Assert(err, IsNil)

	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	chg := s.state.NewChange("install", "...")
	t := s.state.NewTask("validate-snap", "Fetch and check snap assertions")
	snapsup := snapstate.SnapSetup{
		SnapPath: snapPath,
		UserID:   0,
		SideInfo: &snap.SideInfo{
			RealName: "foo",
			SnapID:   "snap-id-1",
			Revision: snap.R(33),
		},
	}
	t.Set("snap-setup", snapsup)
	chg.AddTask(t)

	s.state.Unlock()
	defer s.se.Stop()
	s.settle(c)
	s.state.Lock()

	c.Assert(chg.Err(), ErrorMatches, `(?s).*cannot verify snap "foo", no matching signatures found.*`)
}

func (s *assertMgrSuite) TestValidateSnapCrossCheckFail(c *C) {
	s.prereqSnapAssertions(c, 10)

	tempdir := c.MkDir()
	snapPath := filepath.Join(tempdir, "foo.snap")
	err := ioutil.WriteFile(snapPath, fakeSnap(10), 0644)
	c.Assert(err, IsNil)

	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	chg := s.state.NewChange("install", "...")
	t := s.state.NewTask("validate-snap", "Fetch and check snap assertions")
	snapsup := snapstate.SnapSetup{
		SnapPath: snapPath,
		UserID:   0,
		SideInfo: &snap.SideInfo{
			RealName: "f",
			SnapID:   "snap-id-1",
			Revision: snap.R(10),
		},
	}
	t.Set("snap-setup", snapsup)
	chg.AddTask(t)

	s.state.Unlock()
	defer s.se.Stop()
	s.settle(c)
	s.state.Lock()

	c.Assert(chg.Err(), ErrorMatches, `(?s).*cannot install "f", snap "f" is undergoing a rename to "foo".*`)
}

func (s *assertMgrSuite) validationSetAssert(c *C, name, sequence, revision string, snapPresence string) *asserts.ValidationSet {
	snaps := []interface{}{map[string]interface{}{
		"id":       "qOqKhntON3vR7kwEbVPsILm7bUViPDzz",
		"name":     "foo",
		"presence": snapPresence,
	}}
	if snapPresence != "invalid" {
		snaps[0].(map[string]interface{})["revision"] = "1"
	}
	headers := map[string]interface{}{
		"series":       "16",
		"account-id":   s.dev1Acct.AccountID(),
		"authority-id": s.dev1Acct.AccountID(),
		"publisher-id": s.dev1Acct.AccountID(),
		"name":         name,
		"sequence":     sequence,
		"snaps":        snaps,
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     revision,
	}
	a, err := s.dev1Signing.Sign(asserts.ValidationSetType, headers, nil, "")
	c.Assert(err, IsNil)
	return a.(*asserts.ValidationSet)
}

func (s *assertMgrSuite) snapDecl(c *C, name string, extraHeaders map[string]interface{}) *asserts.SnapDeclaration {
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      name + "-id",
		"snap-name":    name,
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
	}
	for h, v := range extraHeaders {
		headers[h] = v
	}
	decl, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(decl)
	c.Assert(err, IsNil)
	return decl.(*asserts.SnapDeclaration)
}

func (s *assertMgrSuite) stateFromDecl(c *C, decl *asserts.SnapDeclaration, instanceName string, revno snap.Revision) {
	snapName, instanceKey := snap.SplitInstanceName(instanceName)
	if snapName == "" {
		snapName = decl.SnapName()
		instanceName = snapName
	}

	c.Assert(snapName, Equals, decl.SnapName())

	snapID := decl.SnapID()
	snapstate.Set(s.state, instanceName, &snapstate.SnapState{
		Active: true,
		Sequence: []*snap.SideInfo{
			{RealName: snapName, SnapID: snapID, Revision: revno},
		},
		Current:     revno,
		InstanceKey: instanceKey,
	})
}

func (s *assertMgrSuite) TestRefreshAssertionsRefreshSnapDeclarationsAndValidationSets(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	storeAs := s.setupModelAndStore(c)
	snapDeclFoo := s.snapDecl(c, "foo", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	c.Assert(s.storeSigning.Add(storeAs), IsNil)

	// previous state
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, snapDeclFoo), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)
	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	// changed snap decl assertion
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "fo-o",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	// changed validation set assertion
	vsetAs2 := s.validationSetAssert(c, "bar", "2", "3", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	err = assertstate.RefreshSnapAssertions(s.state, 0)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, "fo-o")

	a, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
	c.Check(a.Revision(), Equals, 3)

	c.Assert(err, IsNil)
	c.Check(s.fakeStore.(*fakeStore).opts.IsAutoRefresh, Equals, false)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsTooEarly(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	r := snapstatetest.MockDeviceModel(nil)
	defer r()

	err := assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Check(err, FitsTypeOf, &snapstate.ChangeConflictError{})
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsNop(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	err := assertstate.RefreshSnapDeclarations(s.state, 0, &assertstate.RefreshAssertionsOptions{IsAutoRefresh: true})
	c.Assert(err, IsNil)
	c.Check(s.fakeStore.(*fakeStore).opts.IsAutoRefresh, Equals, true)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsNoStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))
	snapstate.Set(s.state, "local", &snapstate.SnapState{
		Active: false,
		Sequence: []*snap.SideInfo{
			{RealName: "local", Revision: snap.R(-1)},
		},
		Current: snap.R(-1),
	})

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	// one changed assertion
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "fo-o",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, "fo-o")

	// another one
	// one changed assertion
	headers = s.dev1Acct.Headers()
	headers["display-name"] = "Dev 1 edited display-name"
	headers["revision"] = "1"
	dev1Acct1, err := s.storeSigning.Sign(asserts.AccountType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(dev1Acct1)
	c.Assert(err, IsNil)

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err = assertstate.DB(s.state).Find(asserts.AccountType, map[string]string{
		"account-id": s.dev1Acct.AccountID(),
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.Account).DisplayName(), Equals, "Dev 1 edited display-name")

	// change snap decl to something that has a too new format
	s.fakeStore.(*fakeStore).maxDeclSupportedFormat = 999
	(func() {
		restore := asserts.MockMaxSupportedFormat(asserts.SnapDeclarationType, 999)
		defer restore()

		headers := map[string]interface{}{
			"format":       "999",
			"series":       "16",
			"snap-id":      "foo-id",
			"snap-name":    "foo",
			"publisher-id": s.dev1Acct.AccountID(),
			"timestamp":    time.Now().Format(time.RFC3339),
			"revision":     "2",
		}

		snapDeclFoo2, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
		c.Assert(err, IsNil)
		err = s.storeSigning.Add(snapDeclFoo2)
		c.Assert(err, IsNil)
	})()

	// no error, kept the old one
	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err = assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, "fo-o")
	c.Check(a.(*asserts.SnapDeclaration).Revision(), Equals, 1)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsChangingKey(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	storePrivKey2, _ := assertstest.GenerateKey(752)
	err = s.storeSigning.ImportKey(storePrivKey2)
	c.Assert(err, IsNil)
	storeKey2 := assertstest.NewAccountKey(s.storeSigning.RootSigning, s.storeSigning.TrustedAccount, map[string]interface{}{
		"name": "store2",
	}, storePrivKey2.PublicKey(), "")
	err = s.storeSigning.Add(storeKey2)
	c.Assert(err, IsNil)

	// one changed assertion signed with different key
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "foo",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	storeKey2ID := storePrivKey2.PublicKey().ID()
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, storeKey2ID)
	c.Assert(err, IsNil)
	c.Check(snapDeclFoo1.SignKeyID(), Not(Equals), snapDeclFoo.SignKeyID())
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	_, err = storeKey2.Ref().Resolve(assertstate.DB(s.state).Find)
	c.Check(asserts.IsNotFound(err), Equals, true)

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.Revision(), Equals, 1)
	c.Check(a.SignKeyID(), Equals, storeKey2ID)

	// key was fetched as well
	_, err = storeKey2.Ref().Resolve(assertstate.DB(s.state).Find)
	c.Check(err, IsNil)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsWithStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	storeAs := s.setupModelAndStore(c)

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	// one changed assertion
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "fo-o",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	// store assertion is missing
	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, "fo-o")

	// changed again
	headers = map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "f-oo",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "2",
	}
	snapDeclFoo2, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo2)
	c.Assert(err, IsNil)

	// store assertion is available
	err = s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err = assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
		"series":  "16",
		"snap-id": "foo-id",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, "f-oo")

	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)

	// store assertion has changed
	a, err = s.storeSigning.Sign(asserts.StoreType, map[string]interface{}{
		"authority-id": s.storeSigning.AuthorityID,
		"operator-id":  s.storeSigning.AuthorityID,
		"store":        "my-brand-store",
		"location":     "the-cloud",
		"revision":     "1",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	storeAs = a.(*asserts.Store)
	err = s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, IsNil)
	a, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.Store).Location(), Equals, "the-cloud")
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsDownloadError(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	// one changed assertion
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "fo-o",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	s.fakeStore.(*fakeStore).downloadAssertionsErr = errors.New("download error")

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, ErrorMatches, `cannot refresh snap-declarations for snaps:
 - foo: download error`)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsPersistentNetworkError(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	snapDeclFoo := s.snapDecl(c, "foo", nil)

	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	// one changed assertion
	headers := map[string]interface{}{
		"series":       "16",
		"snap-id":      "foo-id",
		"snap-name":    "fo-o",
		"publisher-id": s.dev1Acct.AccountID(),
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "1",
	}
	snapDeclFoo1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(snapDeclFoo1)
	c.Assert(err, IsNil)

	pne := new(httputil.PersistentNetworkError)
	s.fakeStore.(*fakeStore).snapActionErr = pne

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	c.Assert(err, Equals, pne)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsNoStoreFallback(c *C) {
	// test that if we get a 4xx or 500 error from the store trying bulk
	// assertion refresh we fall back to the old logic
	s.fakeStore.(*fakeStore).snapActionErr = &store.UnexpectedHTTPStatusError{StatusCode: 400}

	logbuf, restore := logger.MockLogger()
	defer restore()

	s.TestRefreshSnapDeclarationsNoStore(c)

	c.Check(logbuf.String(), Matches, "(?m).*bulk refresh of snap-declarations failed, falling back to one-by-one assertion fetching:.*HTTP status code 400.*")
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsNoStoreFallbackUnexpectedSnapActionError(c *C) {
	// test that if we get an unexpected SnapAction error from the
	// store trying bulk assertion refresh we fall back to the old
	// logic
	s.fakeStore.(*fakeStore).snapActionErr = &store.SnapActionError{
		NoResults: true,
		Other:     []error{errors.New("unexpected error")},
	}

	logbuf, restore := logger.MockLogger()
	defer restore()

	s.TestRefreshSnapDeclarationsNoStore(c)

	c.Check(logbuf.String(), Matches, "(?m).*bulk refresh of snap-declarations failed, falling back to one-by-one assertion fetching:.*unexpected error.*")
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsWithStoreFallback(c *C) {
	// test that if we get a 4xx or 500 error from the store trying bulk
	// assertion refresh we fall back to the old logic
	s.fakeStore.(*fakeStore).snapActionErr = &store.UnexpectedHTTPStatusError{StatusCode: 500}

	logbuf, restore := logger.MockLogger()
	defer restore()

	s.TestRefreshSnapDeclarationsWithStore(c)

	c.Check(logbuf.String(), Matches, "(?m).*bulk refresh of snap-declarations failed, falling back to one-by-one assertion fetching:.*HTTP status code 500.*")
}

// the following tests cover what happens when refreshing snap-declarations
// need to support overflowing the chosen asserts.Pool maximum groups

func (s *assertMgrSuite) testRefreshSnapDeclarationsMany(c *C, n int) error {
	// reduce maxGroups to test and stress the logic that deals
	// with overflowing it
	s.AddCleanup(assertstate.MockMaxGroups(16))

	// previous state
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)

	for i := 1; i <= n; i++ {
		name := fmt.Sprintf("foo%d", i)
		snapDeclFooX := s.snapDecl(c, name, nil)

		s.stateFromDecl(c, snapDeclFooX, "", snap.R(7+i))

		// previous state
		err = assertstate.Add(s.state, snapDeclFooX)
		c.Assert(err, IsNil)

		// make an update on top
		headers := map[string]interface{}{
			"series":       "16",
			"snap-id":      name + "-id",
			"snap-name":    fmt.Sprintf("fo-o-%d", i),
			"publisher-id": s.dev1Acct.AccountID(),
			"timestamp":    time.Now().Format(time.RFC3339),
			"revision":     "1",
		}
		snapDeclFooX1, err := s.storeSigning.Sign(asserts.SnapDeclarationType, headers, nil, "")
		c.Assert(err, IsNil)
		err = s.storeSigning.Add(snapDeclFooX1)
		c.Assert(err, IsNil)
	}

	err = assertstate.RefreshSnapDeclarations(s.state, 0, nil)
	if err != nil {
		// fot the caller to check
		return err
	}

	// check we got the updates
	for i := 1; i <= n; i++ {
		name := fmt.Sprintf("foo%d", i)
		a, err := assertstate.DB(s.state).Find(asserts.SnapDeclarationType, map[string]string{
			"series":  "16",
			"snap-id": name + "-id",
		})
		c.Assert(err, IsNil)
		c.Check(a.(*asserts.SnapDeclaration).SnapName(), Equals, fmt.Sprintf("fo-o-%d", i))
	}

	return nil
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany14NoStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	s.setModel(sysdb.GenericClassicModel())

	err := s.testRefreshSnapDeclarationsMany(c, 14)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "snap-declaration"},
	})
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany16NoStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	s.setModel(sysdb.GenericClassicModel())

	err := s.testRefreshSnapDeclarationsMany(c, 16)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "snap-declaration"},
	})
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany16WithStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	err = s.testRefreshSnapDeclarationsMany(c, 16)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		// first 16 groups request
		{"account", "account-key", "snap-declaration"},
		// final separate request covering store only
		{"store"},
	})

	// store assertion was also fetched
	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany17NoStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	s.setModel(sysdb.GenericClassicModel())

	err := s.testRefreshSnapDeclarationsMany(c, 17)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		// first 16 groups request
		{"account", "account-key", "snap-declaration"},
		// final separate request for the rest
		{"snap-declaration"},
	})
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany17NoStoreMergeErrors(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	s.setModel(sysdb.GenericClassicModel())

	s.fakeStore.(*fakeStore).downloadAssertionsErr = errors.New("download error")

	err := s.testRefreshSnapDeclarationsMany(c, 17)
	c.Check(err, ErrorMatches, `(?s)cannot refresh snap-declarations for snaps:
 - foo1: download error.* - foo9: download error`)
	// all foo* snaps accounted for
	c.Check(strings.Count(err.Error(), "foo"), Equals, 17)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		// first 16 groups request
		{"account", "account-key", "snap-declaration"},
		// final separate request for the rest
		{"snap-declaration"},
	})
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany31WithStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	err = s.testRefreshSnapDeclarationsMany(c, 31)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		// first 16 groups request
		{"account", "account-key", "snap-declaration"},
		// final separate request for the rest and store
		{"snap-declaration", "store"},
	})

	// store assertion was also fetched
	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestRefreshSnapDeclarationsMany32WithStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()
	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	err = s.testRefreshSnapDeclarationsMany(c, 32)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		// first 16 groups request
		{"account", "account-key", "snap-declaration"},
		// 2nd round request
		{"snap-declaration"},
		// final separate request covering store
		{"store"},
	})

	// store assertion was also fetched
	_, err = assertstate.DB(s.state).Find(asserts.StoreType, map[string]string{
		"store": "my-brand-store",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestValidateRefreshesNothing(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	validated, err := assertstate.ValidateRefreshes(s.state, nil, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, IsNil)
	c.Check(validated, HasLen, 0)
}

func (s *assertMgrSuite) TestValidateRefreshesNoControl(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", nil)
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh}, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, IsNil)
	c.Check(validated, DeepEquals, []*snap.Info{fooRefresh})
}

func (s *assertMgrSuite) TestValidateRefreshesMissingValidation(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh}, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, ErrorMatches, `cannot refresh "foo" to revision 9: no validation by "bar"`)
	c.Check(validated, HasLen, 0)
}

func (s *assertMgrSuite) TestParallelInstanceValidateRefreshesMissingValidation(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclFoo, "foo_instance", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooInstanceRefresh := &snap.Info{
		SideInfo:    snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
		InstanceKey: "instance",
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooInstanceRefresh}, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, ErrorMatches, `cannot refresh "foo_instance" to revision 9: no validation by "bar"`)
	c.Check(validated, HasLen, 0)
}

func (s *assertMgrSuite) TestValidateRefreshesMissingValidationButIgnore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh}, map[string]bool{"foo": true}, 0, s.trivialDeviceCtx)
	c.Assert(err, IsNil)
	c.Check(validated, DeepEquals, []*snap.Info{fooRefresh})
}

func (s *assertMgrSuite) TestParallelInstanceValidateRefreshesMissingValidationButIgnore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclFoo, "foo_instance", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}
	fooInstanceRefresh := &snap.Info{
		SideInfo:    snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
		InstanceKey: "instance",
	}

	// validation is ignore for foo_instance but not for foo
	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh, fooInstanceRefresh}, map[string]bool{"foo_instance": true}, 0, s.trivialDeviceCtx)
	c.Assert(err, ErrorMatches, `cannot refresh "foo" to revision 9: no validation by "bar"`)
	c.Check(validated, DeepEquals, []*snap.Info{fooInstanceRefresh})
}

func (s *assertMgrSuite) TestParallelInstanceValidateRefreshesMissingValidationButIgnoreInstanceKeyed(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "foo_instance", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooInstanceRefresh := &snap.Info{
		SideInfo:    snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
		InstanceKey: "instance",
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooInstanceRefresh}, map[string]bool{"foo_instance": true}, 0, s.trivialDeviceCtx)
	c.Assert(err, IsNil)
	c.Check(validated, DeepEquals, []*snap.Info{fooInstanceRefresh})
}

func (s *assertMgrSuite) TestParallelInstanceValidateRefreshesMissingValidationButIgnoreBothOneIgnored(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclFoo, "foo_instance", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}
	fooInstanceRefresh := &snap.Info{
		SideInfo:    snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
		InstanceKey: "instance",
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh, fooInstanceRefresh}, map[string]bool{"foo_instance": true}, 0, s.trivialDeviceCtx)
	c.Assert(err, ErrorMatches, `cannot refresh "foo" to revision 9: no validation by "bar"`)
	c.Check(validated, DeepEquals, []*snap.Info{fooInstanceRefresh})
}

func (s *assertMgrSuite) TestValidateRefreshesValidationOK(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	snapDeclBaz := s.snapDecl(c, "baz", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclFoo, "foo_instance", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))
	s.stateFromDecl(c, snapDeclBaz, "", snap.R(1))
	snapstate.Set(s.state, "local", &snapstate.SnapState{
		Active: false,
		Sequence: []*snap.SideInfo{
			{RealName: "local", Revision: snap.R(-1)},
		},
		Current: snap.R(-1),
	})

	// validation by bar
	headers := map[string]interface{}{
		"series":                 "16",
		"snap-id":                "bar-id",
		"approved-snap-id":       "foo-id",
		"approved-snap-revision": "9",
		"timestamp":              time.Now().Format(time.RFC3339),
	}
	barValidation, err := s.dev1Signing.Sign(asserts.ValidationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(barValidation)
	c.Assert(err, IsNil)

	// validation by baz
	headers = map[string]interface{}{
		"series":                 "16",
		"snap-id":                "baz-id",
		"approved-snap-id":       "foo-id",
		"approved-snap-revision": "9",
		"timestamp":              time.Now().Format(time.RFC3339),
	}
	bazValidation, err := s.dev1Signing.Sign(asserts.ValidationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(bazValidation)
	c.Assert(err, IsNil)

	err = assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBaz)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}
	fooInstanceRefresh := &snap.Info{
		SideInfo:    snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
		InstanceKey: "instance",
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh, fooInstanceRefresh}, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, IsNil)
	c.Check(validated, DeepEquals, []*snap.Info{fooRefresh, fooInstanceRefresh})
}

func (s *assertMgrSuite) TestValidateRefreshesRevokedValidation(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	snapDeclFoo := s.snapDecl(c, "foo", nil)
	snapDeclBar := s.snapDecl(c, "bar", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	snapDeclBaz := s.snapDecl(c, "baz", map[string]interface{}{
		"refresh-control": []interface{}{"foo-id"},
	})
	s.stateFromDecl(c, snapDeclFoo, "", snap.R(7))
	s.stateFromDecl(c, snapDeclBar, "", snap.R(3))
	s.stateFromDecl(c, snapDeclBaz, "", snap.R(1))
	snapstate.Set(s.state, "local", &snapstate.SnapState{
		Active: false,
		Sequence: []*snap.SideInfo{
			{RealName: "local", Revision: snap.R(-1)},
		},
		Current: snap.R(-1),
	})

	// validation by bar
	headers := map[string]interface{}{
		"series":                 "16",
		"snap-id":                "bar-id",
		"approved-snap-id":       "foo-id",
		"approved-snap-revision": "9",
		"timestamp":              time.Now().Format(time.RFC3339),
	}
	barValidation, err := s.dev1Signing.Sign(asserts.ValidationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(barValidation)
	c.Assert(err, IsNil)

	// revoked validation by baz
	headers = map[string]interface{}{
		"series":                 "16",
		"snap-id":                "baz-id",
		"approved-snap-id":       "foo-id",
		"approved-snap-revision": "9",
		"revoked":                "true",
		"timestamp":              time.Now().Format(time.RFC3339),
	}
	bazValidation, err := s.dev1Signing.Sign(asserts.ValidationType, headers, nil, "")
	c.Assert(err, IsNil)
	err = s.storeSigning.Add(bazValidation)
	c.Assert(err, IsNil)

	err = assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBar)
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, snapDeclBaz)
	c.Assert(err, IsNil)

	fooRefresh := &snap.Info{
		SideInfo: snap.SideInfo{RealName: "foo", SnapID: "foo-id", Revision: snap.R(9)},
	}

	validated, err := assertstate.ValidateRefreshes(s.state, []*snap.Info{fooRefresh}, nil, 0, s.trivialDeviceCtx)
	c.Assert(err, ErrorMatches, `(?s).*cannot refresh "foo" to revision 9: validation by "baz" \(id "baz-id"\) revoked.*`)
	c.Check(validated, HasLen, 0)
}

func (s *assertMgrSuite) TestBaseSnapDeclaration(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	r1 := assertstest.MockBuiltinBaseDeclaration(nil)
	defer r1()

	baseDecl, err := assertstate.BaseDeclaration(s.state)
	c.Assert(asserts.IsNotFound(err), Equals, true)
	c.Check(baseDecl, IsNil)

	r2 := assertstest.MockBuiltinBaseDeclaration([]byte(`
type: base-declaration
authority-id: canonical
series: 16
plugs:
  iface: true
`))
	defer r2()

	baseDecl, err = assertstate.BaseDeclaration(s.state)
	c.Assert(err, IsNil)
	c.Check(baseDecl, NotNil)
	c.Check(baseDecl.PlugRule("iface"), NotNil)
}

func (s *assertMgrSuite) TestSnapDeclaration(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a declaration in the system db
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	snapDeclFoo := s.snapDecl(c, "foo", nil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	_, err = assertstate.SnapDeclaration(s.state, "snap-id-other")
	c.Check(asserts.IsNotFound(err), Equals, true)

	snapDecl, err := assertstate.SnapDeclaration(s.state, "foo-id")
	c.Assert(err, IsNil)
	c.Check(snapDecl.SnapName(), Equals, "foo")
}

func (s *assertMgrSuite) TestAutoAliasesTemporaryFallback(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// prereqs for developer assertions in the system db
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)

	// not from the store
	aliases, err := assertstate.AutoAliases(s.state, &snap.Info{SuggestedName: "local"})
	c.Assert(err, IsNil)
	c.Check(aliases, HasLen, 0)

	// missing
	_, err = assertstate.AutoAliases(s.state, &snap.Info{
		SideInfo: snap.SideInfo{
			RealName: "baz",
			SnapID:   "baz-id",
		},
	})
	c.Check(err, ErrorMatches, `internal error: cannot find snap-declaration for installed snap "baz": snap-declaration \(baz-id; series:16\) not found`)

	info := snaptest.MockInfo(c, `
name: foo
version: 0
apps:
   cmd1:
     aliases: [alias1]
   cmd2:
     aliases: [alias2]
`, &snap.SideInfo{
		RealName: "foo",
		SnapID:   "foo-id",
	})

	// empty list
	// have a declaration in the system db
	snapDeclFoo := s.snapDecl(c, "foo", nil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	aliases, err = assertstate.AutoAliases(s.state, info)
	c.Assert(err, IsNil)
	c.Check(aliases, HasLen, 0)

	// some aliases
	snapDeclFoo = s.snapDecl(c, "foo", map[string]interface{}{
		"auto-aliases": []interface{}{"alias1", "alias2", "alias3"},
		"revision":     "1",
	})
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	aliases, err = assertstate.AutoAliases(s.state, info)
	c.Assert(err, IsNil)
	c.Check(aliases, DeepEquals, map[string]string{
		"alias1": "cmd1",
		"alias2": "cmd2",
	})
}

func (s *assertMgrSuite) TestAutoAliasesExplicit(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// prereqs for developer assertions in the system db
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)

	// not from the store
	aliases, err := assertstate.AutoAliases(s.state, &snap.Info{SuggestedName: "local"})
	c.Assert(err, IsNil)
	c.Check(aliases, HasLen, 0)

	// missing
	_, err = assertstate.AutoAliases(s.state, &snap.Info{
		SideInfo: snap.SideInfo{
			RealName: "baz",
			SnapID:   "baz-id",
		},
	})
	c.Check(err, ErrorMatches, `internal error: cannot find snap-declaration for installed snap "baz": snap-declaration \(baz-id; series:16\) not found`)

	// empty list
	// have a declaration in the system db
	snapDeclFoo := s.snapDecl(c, "foo", nil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	aliases, err = assertstate.AutoAliases(s.state, &snap.Info{
		SideInfo: snap.SideInfo{
			RealName: "foo",
			SnapID:   "foo-id",
		},
	})
	c.Assert(err, IsNil)
	c.Check(aliases, HasLen, 0)

	// some aliases
	snapDeclFoo = s.snapDecl(c, "foo", map[string]interface{}{
		"aliases": []interface{}{
			map[string]interface{}{
				"name":   "alias1",
				"target": "cmd1",
			},
			map[string]interface{}{
				"name":   "alias2",
				"target": "cmd2",
			},
		},
		"revision": "1",
	})
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)
	aliases, err = assertstate.AutoAliases(s.state, &snap.Info{
		SideInfo: snap.SideInfo{
			RealName: "foo",
			SnapID:   "foo-id",
		},
	})
	c.Assert(err, IsNil)
	c.Check(aliases, DeepEquals, map[string]string{
		"alias1": "cmd1",
		"alias2": "cmd2",
	})
}

func (s *assertMgrSuite) TestPublisher(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a declaration in the system db
	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	snapDeclFoo := s.snapDecl(c, "foo", nil)
	err = assertstate.Add(s.state, snapDeclFoo)
	c.Assert(err, IsNil)

	_, err = assertstate.SnapDeclaration(s.state, "snap-id-other")
	c.Check(asserts.IsNotFound(err), Equals, true)

	acct, err := assertstate.Publisher(s.state, "foo-id")
	c.Assert(err, IsNil)
	c.Check(acct.AccountID(), Equals, s.dev1Acct.AccountID())
	c.Check(acct.Username(), Equals, "developer1")
}

func (s *assertMgrSuite) TestStore(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	err := assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, s.dev1Acct)
	c.Assert(err, IsNil)
	storeHeaders := map[string]interface{}{
		"store":       "foo",
		"operator-id": s.dev1Acct.AccountID(),
		"timestamp":   time.Now().Format(time.RFC3339),
	}
	fooStore, err := s.storeSigning.Sign(asserts.StoreType, storeHeaders, nil, "")
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, fooStore)
	c.Assert(err, IsNil)

	_, err = assertstate.Store(s.state, "bar")
	c.Check(asserts.IsNotFound(err), Equals, true)

	store, err := assertstate.Store(s.state, "foo")
	c.Assert(err, IsNil)
	c.Check(store.Store(), Equals, "foo")
}

// validation-sets related tests

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsNop(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	err := assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestValidationSetAssertionsAutoRefresh(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "2", "3", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	c.Assert(assertstate.AutoRefreshAssertions(s.state, 0), IsNil)
	c.Check(s.fakeStore.(*fakeStore).opts.IsAutoRefresh, Equals, true)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
	c.Check(a.Revision(), Equals, 3)
}

func (s *assertMgrSuite) TestValidationSetAssertionsAutoRefreshError(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)
	err := assertstate.AutoRefreshAssertions(s.state, 0)
	c.Assert(asserts.IsNotFound(err), Equals, true)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsStoreError(c *C) {
	s.fakeStore.(*fakeStore).snapActionErr = &store.UnexpectedHTTPStatusError{StatusCode: 400}
	s.state.Lock()
	defer s.state.Unlock()

	s.setModel(sysdb.GenericClassicModel())

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	err := assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, ErrorMatches, `cannot refresh validation set assertions: cannot : got unexpected HTTP status code 400.*`)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertions(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "1", "2", "required")
	err = s.storeSigning.Add(vsetAs2)
	c.Assert(err, IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	err = assertstate.RefreshValidationSetAssertions(s.state, 0, &assertstate.RefreshAssertionsOptions{IsAutoRefresh: true})
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "1",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "bar")
	c.Check(a.Revision(), Equals, 2)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})
	c.Check(s.fakeStore.(*fakeStore).opts.IsAutoRefresh, Equals, true)

	// sequence changed in the store to 4
	vsetAs3 := s.validationSetAssert(c, "bar", "4", "3", "required")
	err = s.storeSigning.Add(vsetAs3)
	c.Assert(err, IsNil)

	// sanity check - sequence 4 not available locally yet
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "4",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)

	s.fakeStore.(*fakeStore).requestedTypes = nil
	err = assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// new sequence is available in the db
	a, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "4",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "bar")

	// tracking current was updated
	c.Assert(assertstate.GetValidationSet(s.state, s.dev1Acct.AccountID(), "bar", &tr), IsNil)
	c.Check(tr.Current, Equals, 4)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsPinned(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	err = assertstate.Add(s.state, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "2", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "2", "5", "required")
	err = s.storeSigning.Add(vsetAs2)
	c.Assert(err, IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   2,
		PinnedAt:  2,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	err = assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "bar")
	c.Check(a.(*asserts.ValidationSet).Sequence(), Equals, 2)
	c.Check(a.Revision(), Equals, 5)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// sequence changed in the store to 7
	vsetAs3 := s.validationSetAssert(c, "bar", "7", "8", "required")
	err = s.storeSigning.Add(vsetAs3)
	c.Assert(err, IsNil)

	s.fakeStore.(*fakeStore).requestedTypes = nil
	err = assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// new sequence is not available in the db
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "7",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)

	// tracking current remains at 2
	c.Assert(assertstate.GetValidationSet(s.state, s.dev1Acct.AccountID(), "bar", &tr), IsNil)
	c.Check(tr.Current, Equals, 2)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsLocalOnlyFailed(c *C) {
	st := s.state
	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add to local database
	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs1), IsNil)
	vsetAs2 := s.validationSetAssert(c, "baz", "3", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs2), IsNil)

	// vset2 present and updated in the store
	vsetAs2_2 := s.validationSetAssert(c, "baz", "3", "2", "required")
	err = s.storeSigning.Add(vsetAs2_2)
	c.Assert(err, IsNil)

	tr1 := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
		PinnedAt:  1,
		LocalOnly: true,
	}
	tr2 := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "baz",
		Mode:      assertstate.Monitor,
		Current:   3,
		PinnedAt:  3,
	}
	assertstate.UpdateValidationSet(s.state, &tr1)
	assertstate.UpdateValidationSet(s.state, &tr2)

	err = assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)

	// sanity - local assertion vsetAs1 is the latest
	a, err := assertstate.DB(s.state).FindSequence(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "1",
	}, -1, -1)
	c.Assert(err, IsNil)
	vs := a.(*asserts.ValidationSet)
	c.Check(vs.Name(), Equals, "bar")
	c.Check(vs.Sequence(), Equals, 1)
	c.Check(vs.Revision(), Equals, 1)

	// but vsetAs2 was updated with vsetAs2_2
	a, err = assertstate.DB(s.state).FindSequence(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "baz",
		"sequence":   "1",
	}, -1, -1)
	c.Assert(err, IsNil)
	vs = a.(*asserts.ValidationSet)
	c.Check(vs.Name(), Equals, "baz")
	c.Check(vs.Sequence(), Equals, 3)
	c.Check(vs.Revision(), Equals, 2)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsEnforcingModeHappyNotPinned(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "foo", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "1", "2", "required")
	c.Assert(assertstate.Add(s.state, vsetAs2), IsNil)

	// in the store
	vsetAs3 := s.validationSetAssert(c, "foo", "1", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs3), IsNil)

	vsetAs4 := s.validationSetAssert(c, "bar", "2", "3", "required")
	c.Assert(s.storeSigning.Add(vsetAs4), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "foo",
		Mode:      assertstate.Enforce,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)
	tr = assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Enforce,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	err = assertstate.RefreshValidationSetAssertions(s.state, 0, nil)
	c.Assert(err, IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "foo",
		"sequence":   "1",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "foo")
	c.Check(a.Revision(), Equals, 2)

	a, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "bar")
	c.Check(a.(*asserts.ValidationSet).Sequence(), Equals, 2)
	c.Check(a.Revision(), Equals, 3)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// tracking current was updated
	c.Assert(assertstate.GetValidationSet(s.state, s.dev1Acct.AccountID(), "bar", &tr), IsNil)
	c.Check(tr.Current, Equals, 2)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsEnforcingModeHappyPinned(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "bar", "1", "2", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	// in the store
	c.Assert(s.storeSigning.Add(vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "2", "3", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Enforce,
		PinnedAt:  1,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	c.Assert(assertstate.RefreshValidationSetAssertions(s.state, 0, nil), IsNil)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "1",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "bar")
	c.Check(a.(*asserts.ValidationSet).Sequence(), Equals, 1)
	c.Check(a.Revision(), Equals, 2)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// tracking current was updated
	c.Assert(assertstate.GetValidationSet(s.state, s.dev1Acct.AccountID(), "bar", &tr), IsNil)
	c.Check(tr.Current, Equals, 1)
}

func (s *assertMgrSuite) TestRefreshValidationSetAssertionsEnforcingModeConflict(c *C) {
	s.state.Lock()
	defer s.state.Unlock()

	logbuf, restore := logger.MockLogger()
	defer restore()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	err := s.storeSigning.Add(storeAs)
	c.Assert(err, IsNil)

	// store key already present
	c.Assert(assertstate.Add(s.state, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(s.state, s.dev1AcctKey), IsNil)

	vsetAs1 := s.validationSetAssert(c, "foo", "1", "1", "required")
	c.Assert(assertstate.Add(s.state, vsetAs1), IsNil)

	vsetAs2 := s.validationSetAssert(c, "bar", "1", "2", "required")
	c.Assert(assertstate.Add(s.state, vsetAs2), IsNil)

	// in the store
	vsetAs3 := s.validationSetAssert(c, "foo", "2", "2", "invalid")
	c.Assert(s.storeSigning.Add(vsetAs3), IsNil)

	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "foo",
		Mode:      assertstate.Enforce,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)
	tr = assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Enforce,
		Current:   1,
	}
	assertstate.UpdateValidationSet(s.state, &tr)

	c.Assert(assertstate.RefreshValidationSetAssertions(s.state, 0, nil), IsNil)
	c.Assert(logbuf.String(), Matches, `.*cannot refresh to conflicting validation set assertions: validation sets are in conflict:\n- cannot constrain snap "foo" as both invalid .* and required at revision 1.*\n`)

	a, err := assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "foo",
		"sequence":   "1",
	})
	c.Assert(err, IsNil)
	c.Check(a.(*asserts.ValidationSet).Name(), Equals, "foo")
	c.Check(a.Revision(), Equals, 1)

	// new assertion wasn't committed to the database.
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "foo",
		"sequence":   "2",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)

	c.Check(s.fakeStore.(*fakeStore).requestedTypes, DeepEquals, [][]string{
		{"account", "account-key", "validation-set"},
	})

	// tracking current wasn't updated
	c.Assert(assertstate.GetValidationSet(s.state, s.dev1Acct.AccountID(), "foo", &tr), IsNil)
	c.Check(tr.Current, Equals, 1)
}

func (s *assertMgrSuite) TestValidationSetAssertionForMonitorLocalFallbackForPinned(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add to local database
	vsetAs := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs), IsNil)

	opts := assertstate.ResolveOptions{AllowLocalFallback: true}
	vs, local, err := assertstate.ValidationSetAssertionForMonitor(st, s.dev1Acct.AccountID(), "bar", 1, true, 0, &opts)
	c.Assert(err, IsNil)
	c.Assert(vs, NotNil)
	c.Assert(local, Equals, true)
}

func (s *assertMgrSuite) TestValidationSetAssertionForMonitorPinnedRefreshedFromStore(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add to local database
	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs1), IsNil)

	// newer revision available in the store
	vsetAs2 := s.validationSetAssert(c, "bar", "1", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	vs, local, err := assertstate.ValidationSetAssertionForMonitor(st, s.dev1Acct.AccountID(), "bar", 1, true, 0, nil)
	c.Assert(err, IsNil)
	c.Assert(local, Equals, false)
	c.Check(vs.Revision(), Equals, 2)
	c.Check(vs.Sequence(), Equals, 1)
}

func (s *assertMgrSuite) TestValidationSetAssertionForMonitorUnpinnedRefreshedFromStore(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add to local database
	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs1), IsNil)

	// newer assertion available in the store
	vsetAs2 := s.validationSetAssert(c, "bar", "3", "1", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	vs, local, err := assertstate.ValidationSetAssertionForMonitor(st, s.dev1Acct.AccountID(), "bar", 0, false, 0, nil)
	c.Assert(err, IsNil)
	c.Assert(local, Equals, false)
	c.Check(vs.Revision(), Equals, 1)
	c.Check(vs.Sequence(), Equals, 3)
}

func (s *assertMgrSuite) TestValidationSetAssertionForMonitorUnpinnedNotFound(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)

	_, _, err := assertstate.ValidationSetAssertionForMonitor(st, s.dev1Acct.AccountID(), "bar", 0, false, 0, nil)
	c.Assert(err, ErrorMatches, fmt.Sprintf(`cannot fetch and resolve assertions:\n - validation-set/16/%s/bar: validation-set assertion not found.*`, s.dev1Acct.AccountID()))
}

// Test for enforce mode

func (s *assertMgrSuite) TestValidationSetAssertionForEnforceNotPinnedHappy(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add sequence to the store
	vsetAs := s.validationSetAssert(c, "bar", "2", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs), IsNil)

	snaps := []*snapasserts.InstalledSnap{
		snapasserts.NewInstalledSnap("foo", "qOqKhntON3vR7kwEbVPsILm7bUViPDzz", snap.Revision{N: 1}),
		snapasserts.NewInstalledSnap("other", "ididididid", snap.Revision{N: 1}),
	}

	sequence := 0
	vs, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Assert(err, IsNil)
	c.Check(vs.Revision(), Equals, 2)
	c.Check(vs.Sequence(), Equals, 2)

	// and it has been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestValidationSetAssertionForEnforcePinnedHappy(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add sequence to the store
	vsetAs := s.validationSetAssert(c, "bar", "2", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs), IsNil)

	snaps := []*snapasserts.InstalledSnap{
		snapasserts.NewInstalledSnap("foo", "qOqKhntON3vR7kwEbVPsILm7bUViPDzz", snap.Revision{N: 1}),
	}

	sequence := 2
	vs, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Assert(err, IsNil)
	c.Check(vs.Revision(), Equals, 2)
	c.Check(vs.Sequence(), Equals, 2)

	// and it has been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(err, IsNil)
	c.Check(s.fakeStore.(*fakeStore).opts.IsAutoRefresh, Equals, false)
}

func (s *assertMgrSuite) TestValidationSetAssertionForEnforceNotPinnedUnhappyMissingSnap(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add sequence to the store
	vsetAs := s.validationSetAssert(c, "bar", "2", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs), IsNil)

	snaps := []*snapasserts.InstalledSnap{}
	sequence := 0
	_, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Assert(err, NotNil)
	verr, ok := err.(*snapasserts.ValidationSetsValidationError)
	c.Assert(ok, Equals, true)
	c.Check(verr.MissingSnaps, DeepEquals, map[string][]string{
		"foo": {fmt.Sprintf("%s/bar", s.dev1Acct.AccountID())},
	})

	// and it hasn't been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)
}

func (s *assertMgrSuite) TestValidationSetAssertionForEnforceNotPinnedUnhappyConflict(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add an assertion to local database
	vsetAs := s.validationSetAssert(c, "boo", "4", "4", "invalid")
	c.Assert(assertstate.Add(st, vsetAs), IsNil)
	// and to the store (for refresh to be happy)
	c.Assert(s.storeSigning.Add(vsetAs), IsNil)

	// and pretend it was tracked already
	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "boo",
		Mode:      assertstate.Enforce,
		Current:   4,
	}
	assertstate.UpdateValidationSet(st, &tr)

	// add sequence to the store, it conflicts with boo
	vsetAs2 := s.validationSetAssert(c, "bar", "2", "2", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	snaps := []*snapasserts.InstalledSnap{}
	sequence := 0
	_, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Check(err, ErrorMatches, fmt.Sprintf(`validation sets are in conflict:\n- cannot constrain snap "foo" as both invalid \(%s/boo\) and required at revision 1 \(%s/bar\)`, s.dev1Acct.AccountID(), s.dev1Acct.AccountID()))

	// and it hasn't been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "2",
	})
	c.Assert(asserts.IsNotFound(err), Equals, true)
}

func (s *assertMgrSuite) TestValidationSetAssertionForEnforceNotPinnedAfterForgetHappy(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add an old assertion to local database; it's not tracked which is the
	// case after 'snap validate --forget' (we don't prune assertions from db).
	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs1), IsNil)

	// newer sequence available in the store
	vsetAs2 := s.validationSetAssert(c, "bar", "3", "5", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	snaps := []*snapasserts.InstalledSnap{
		snapasserts.NewInstalledSnap("foo", "qOqKhntON3vR7kwEbVPsILm7bUViPDzz", snap.Revision{N: 1}),
	}

	sequence := 0
	vs, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Assert(err, IsNil)
	// new assertion got fetched
	c.Check(vs.Revision(), Equals, 5)
	c.Check(vs.Sequence(), Equals, 3)

	// and it has been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "3",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestValidationSetAssertionForEnforceNotPinnedAfterMonitorHappy(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	// have a model and the store assertion available
	storeAs := s.setupModelAndStore(c)
	c.Assert(s.storeSigning.Add(storeAs), IsNil)
	c.Assert(assertstate.Add(st, s.storeSigning.StoreAccountKey("")), IsNil)
	c.Assert(assertstate.Add(st, s.dev1Acct), IsNil)
	c.Assert(assertstate.Add(st, s.dev1AcctKey), IsNil)

	// add and old assertion to local database
	vsetAs1 := s.validationSetAssert(c, "bar", "1", "1", "required")
	c.Assert(assertstate.Add(st, vsetAs1), IsNil)

	// and pretend it was tracked already in monitor mode
	tr := assertstate.ValidationSetTracking{
		AccountID: s.dev1Acct.AccountID(),
		Name:      "bar",
		Mode:      assertstate.Monitor,
		Current:   1,
	}
	assertstate.UpdateValidationSet(st, &tr)

	// newer sequence available in the store
	vsetAs2 := s.validationSetAssert(c, "bar", "3", "5", "required")
	c.Assert(s.storeSigning.Add(vsetAs2), IsNil)

	snaps := []*snapasserts.InstalledSnap{
		snapasserts.NewInstalledSnap("foo", "qOqKhntON3vR7kwEbVPsILm7bUViPDzz", snap.Revision{N: 1}),
	}

	sequence := 0
	vs, err := assertstate.ValidationSetAssertionForEnforce(st, s.dev1Acct.AccountID(), "bar", sequence, 0, snaps)
	c.Assert(err, IsNil)
	// new assertion got fetched
	c.Check(vs.Revision(), Equals, 5)
	c.Check(vs.Sequence(), Equals, 3)

	// and it has been committed
	_, err = assertstate.DB(s.state).Find(asserts.ValidationSetType, map[string]string{
		"series":     "16",
		"account-id": s.dev1Acct.AccountID(),
		"name":       "bar",
		"sequence":   "3",
	})
	c.Assert(err, IsNil)
}

func (s *assertMgrSuite) TestTemporaryDB(c *C) {
	st := s.state

	st.Lock()
	defer st.Unlock()

	err := assertstate.Add(st, s.storeSigning.StoreAccountKey(""))
	c.Assert(err, IsNil)

	a, err := s.storeSigning.Sign(asserts.ModelType, map[string]interface{}{
		"type":         "model",
		"series":       "16",
		"authority-id": s.storeSigning.AuthorityID,
		"brand-id":     s.storeSigning.AuthorityID,
		"model":        "my-model",
		"architecture": "amd64",
		"gadget":       "gadget",
		"kernel":       "krnl",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	model := a.(*asserts.Model)

	aRev2, err := s.storeSigning.Sign(asserts.ModelType, map[string]interface{}{
		"type":         "model",
		"series":       "16",
		"authority-id": s.storeSigning.AuthorityID,
		"brand-id":     s.storeSigning.AuthorityID,
		"model":        "my-model",
		"architecture": "amd64",
		"gadget":       "gadget",
		"kernel":       "krnl",
		"timestamp":    time.Now().Format(time.RFC3339),
		"revision":     "2",
	}, nil, "")
	c.Assert(err, IsNil)
	modelRev2 := aRev2.(*asserts.Model)

	hdrs := map[string]string{
		"series":   "16",
		"model":    "my-model",
		"brand-id": s.storeSigning.AuthorityID,
	}
	// model isn't found in the main DB
	_, err = assertstate.DB(st).Find(asserts.ModelType, hdrs)
	c.Assert(err, NotNil)
	c.Assert(asserts.IsNotFound(err), Equals, true)
	// let's get a temporary DB
	tempDB := assertstate.TemporaryDB(st)
	c.Assert(tempDB, NotNil)
	// and add the model to it
	err = tempDB.Add(model)
	c.Assert(err, IsNil)
	fromTemp, err := tempDB.Find(asserts.ModelType, hdrs)
	c.Assert(err, IsNil)
	c.Assert(fromTemp.(*asserts.Model), DeepEquals, model)
	// the model is only in the temp database
	_, err = assertstate.DB(st).Find(asserts.ModelType, hdrs)
	c.Assert(err, NotNil)
	c.Assert(asserts.IsNotFound(err), Equals, true)

	// let's add it to the DB now
	err = assertstate.Add(st, model)
	c.Assert(err, IsNil)
	// such that we can lookup the revision 2 in a temporary DB
	tempDB = assertstate.TemporaryDB(st)
	c.Assert(tempDB, NotNil)
	err = tempDB.Add(modelRev2)
	c.Assert(err, IsNil)
	fromTemp, err = tempDB.Find(asserts.ModelType, hdrs)
	c.Assert(err, IsNil)
	c.Assert(fromTemp.(*asserts.Model), DeepEquals, modelRev2)
	// but the main DB still returns the old model
	fromDB, err := assertstate.DB(st).Find(asserts.ModelType, hdrs)
	c.Assert(err, IsNil)
	c.Assert(fromDB.(*asserts.Model), DeepEquals, model)
}