github.com/meulengracht/snapd@v0.0.0-20210719210640-8bde69bcc84e/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  	snapd "github.com/snapcore/snapd/cmd/snapd"
    34  	"github.com/snapcore/snapd/dirs"
    35  	"github.com/snapcore/snapd/interfaces/apparmor"
    36  	"github.com/snapcore/snapd/interfaces/seccomp"
    37  	"github.com/snapcore/snapd/logger"
    38  	"github.com/snapcore/snapd/osutil"
    39  	"github.com/snapcore/snapd/testutil"
    40  )
    41  
    42  // Hook up check.v1 into the "go test" runner
    43  func Test(t *testing.T) { TestingT(t) }
    44  
    45  type snapdSuite struct {
    46  	tmpdir string
    47  	testutil.BaseTest
    48  }
    49  
    50  var _ = Suite(&snapdSuite{})
    51  
    52  func (s *snapdSuite) SetUpTest(c *C) {
    53  	s.tmpdir = c.MkDir()
    54  	for _, d := range []string{"/var/lib/snapd", "/run"} {
    55  		err := os.MkdirAll(filepath.Join(s.tmpdir, d), 0755)
    56  		c.Assert(err, IsNil)
    57  	}
    58  	dirs.SetRootDir(s.tmpdir)
    59  
    60  	restore := osutil.MockMountInfo("")
    61  	s.AddCleanup(restore)
    62  }
    63  
    64  func (s *snapdSuite) TestSanityFailGoesIntoDegradedMode(c *C) {
    65  	logbuf, restore := logger.MockLogger()
    66  	defer restore()
    67  	restore = apparmor.MockIsHomeUsingNFS(func() (bool, error) { return false, nil })
    68  	defer restore()
    69  	restore = seccomp.MockSnapSeccompVersionInfo("abcdef 1.2.3 1234abcd -")
    70  	defer restore()
    71  
    72  	sanityErr := fmt.Errorf("foo failed")
    73  	sanityCalled := make(chan bool)
    74  	sanityRan := 0
    75  	restore = snapd.MockSanityCheck(func() error {
    76  		sanityRan++
    77  		// Ensure this ran at least *twice* to avoid a race here:
    78  		// If we close the channel and this wakes up the "select"
    79  		// below immediately and stops this go-routine then the
    80  		// check that the logbuf contains the error will fail.
    81  		// By running this at least twice we know the error made
    82  		// it to the log.
    83  		if sanityRan == 2 {
    84  			close(sanityCalled)
    85  		}
    86  		return sanityErr
    87  	})
    88  	defer restore()
    89  
    90  	restore = snapd.MockCheckRunningConditionsRetryDelay(10 * time.Millisecond)
    91  	defer restore()
    92  
    93  	// run the daemon
    94  	ch := make(chan os.Signal)
    95  	wg := sync.WaitGroup{}
    96  	wg.Add(1)
    97  	go func() {
    98  		defer wg.Done()
    99  		err := snapd.Run(ch)
   100  		c.Check(err, IsNil)
   101  	}()
   102  
   103  	sanityCheckWasRun := false
   104  	select {
   105  	case <-time.After(5 * time.Second):
   106  	case _, stillOpen := <-sanityCalled:
   107  		c.Assert(stillOpen, Equals, false)
   108  		sanityCheckWasRun = true
   109  	}
   110  	c.Check(sanityCheckWasRun, Equals, true)
   111  	c.Check(logbuf.String(), testutil.Contains, "system does not fully support snapd: foo failed")
   112  
   113  	// verify that talking to the daemon yields the sanity error
   114  	// message
   115  	// disable keepliave as it would sometimes cause the daemon to be
   116  	// blocked when closing connections during graceful shutdown
   117  	cli := client.New(&client.Config{DisableKeepAlive: true})
   118  	_, err := cli.Abort("123")
   119  	c.Check(err, ErrorMatches, "system does not fully support snapd: foo failed")
   120  
   121  	// verify that the sysinfo command is still available
   122  	_, err = cli.SysInfo()
   123  	c.Check(err, IsNil)
   124  
   125  	// stop the daemon
   126  	close(ch)
   127  	wg.Wait()
   128  }