github.com/kubiko/snapd@v0.0.0-20201013125620-d4f3094d9ddf/cmd/snapd/main_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package main_test
    21  
    22  import (
    23  	"fmt"
    24  	"os"
    25  	"path/filepath"
    26  	"sync"
    27  	"testing"
    28  	"time"
    29  
    30  	. "gopkg.in/check.v1"
    31  
    32  	"github.com/snapcore/snapd/client"
    33  	"github.com/snapcore/snapd/dirs"
    34  	"github.com/snapcore/snapd/interfaces/apparmor"
    35  	"github.com/snapcore/snapd/interfaces/seccomp"
    36  	"github.com/snapcore/snapd/logger"
    37  	"github.com/snapcore/snapd/osutil"
    38  	"github.com/snapcore/snapd/testutil"
    39  
    40  	snapd "github.com/snapcore/snapd/cmd/snapd"
    41  )
    42  
    43  // Hook up check.v1 into the "go test" runner
    44  func Test(t *testing.T) { TestingT(t) }
    45  
    46  type snapdSuite struct {
    47  	tmpdir string
    48  	testutil.BaseTest
    49  }
    50  
    51  var _ = Suite(&snapdSuite{})
    52  
    53  func (s *snapdSuite) SetUpTest(c *C) {
    54  	s.tmpdir = c.MkDir()
    55  	for _, d := range []string{"/var/lib/snapd", "/run"} {
    56  		err := os.MkdirAll(filepath.Join(s.tmpdir, d), 0755)
    57  		c.Assert(err, IsNil)
    58  	}
    59  	dirs.SetRootDir(s.tmpdir)
    60  
    61  	restore := osutil.MockMountInfo("")
    62  	s.AddCleanup(restore)
    63  }
    64  
    65  func (s *snapdSuite) TestSanityFailGoesIntoDegradedMode(c *C) {
    66  	logbuf, restore := logger.MockLogger()
    67  	defer restore()
    68  	restore = apparmor.MockIsHomeUsingNFS(func() (bool, error) { return false, nil })
    69  	defer restore()
    70  	restore = seccomp.MockSnapSeccompVersionInfo("abcdef 1.2.3 1234abcd -")
    71  	defer restore()
    72  
    73  	sanityErr := fmt.Errorf("foo failed")
    74  	sanityCalled := make(chan bool)
    75  	sanityRan := 0
    76  	restore = snapd.MockSanityCheck(func() error {
    77  		sanityRan++
    78  		// Ensure this ran at least *twice* to avoid a race here:
    79  		// If we close the channel and this wakes up the "select"
    80  		// below immediately and stops this go-routine then the
    81  		// check that the logbuf contains the error will fail.
    82  		// By running this at least twice we know the error made
    83  		// it to the log.
    84  		if sanityRan == 2 {
    85  			close(sanityCalled)
    86  		}
    87  		return sanityErr
    88  	})
    89  	defer restore()
    90  
    91  	restore = snapd.MockCheckRunningConditionsRetryDelay(10 * time.Millisecond)
    92  	defer restore()
    93  
    94  	// run the daemon
    95  	ch := make(chan os.Signal)
    96  	wg := sync.WaitGroup{}
    97  	wg.Add(1)
    98  	go func() {
    99  		defer wg.Done()
   100  		err := snapd.Run(ch)
   101  		c.Check(err, IsNil)
   102  	}()
   103  
   104  	sanityCheckWasRun := false
   105  	select {
   106  	case <-time.After(5 * time.Second):
   107  	case _, stillOpen := <-sanityCalled:
   108  		c.Assert(stillOpen, Equals, false)
   109  		sanityCheckWasRun = true
   110  	}
   111  	c.Check(sanityCheckWasRun, Equals, true)
   112  	c.Check(logbuf.String(), testutil.Contains, "system does not fully support snapd: foo failed")
   113  
   114  	// verify that talking to the daemon yields the sanity error
   115  	// message
   116  	// disable keepliave as it would sometimes cause the daemon to be
   117  	// blocked when closing connections during graceful shutdown
   118  	cli := client.New(&client.Config{DisableKeepAlive: true})
   119  	_, err := cli.Abort("123")
   120  	c.Check(err, ErrorMatches, "system does not fully support snapd: foo failed")
   121  
   122  	// verify that the sysinfo command is still available
   123  	_, err = cli.SysInfo()
   124  	c.Check(err, IsNil)
   125  
   126  	// stop the daemon
   127  	close(ch)
   128  	wg.Wait()
   129  }