github.com/rigado/snapd@v2.42.5-go-mod+incompatible/overlord/snapstate/backend/mountunit_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2014-2016 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 backend_test
    21  
    22  import (
    23  	"fmt"
    24  	"os"
    25  	"path/filepath"
    26  
    27  	. "gopkg.in/check.v1"
    28  
    29  	"github.com/snapcore/snapd/dirs"
    30  	"github.com/snapcore/snapd/osutil"
    31  	"github.com/snapcore/snapd/osutil/squashfs"
    32  	"github.com/snapcore/snapd/overlord/snapstate/backend"
    33  	"github.com/snapcore/snapd/progress"
    34  	"github.com/snapcore/snapd/snap"
    35  	"github.com/snapcore/snapd/systemd"
    36  	"github.com/snapcore/snapd/testutil"
    37  )
    38  
    39  type mountunitSuite struct {
    40  	umount *testutil.MockCmd
    41  
    42  	systemctlRestorer func()
    43  }
    44  
    45  var _ = Suite(&mountunitSuite{})
    46  
    47  func (s *mountunitSuite) SetUpTest(c *C) {
    48  	dirs.SetRootDir(c.MkDir())
    49  
    50  	err := os.MkdirAll(filepath.Join(dirs.GlobalRootDir, "etc", "systemd", "system", "multi-user.target.wants"), 0755)
    51  	c.Assert(err, IsNil)
    52  
    53  	s.systemctlRestorer = systemd.MockSystemctl(func(cmd ...string) ([]byte, error) {
    54  		return []byte("ActiveState=inactive\n"), nil
    55  	})
    56  	s.umount = testutil.MockCommand(c, "umount", "")
    57  }
    58  
    59  func (s *mountunitSuite) TearDownTest(c *C) {
    60  	dirs.SetRootDir("")
    61  	s.umount.Restore()
    62  	s.systemctlRestorer()
    63  }
    64  
    65  func (s *mountunitSuite) TestAddMountUnit(c *C) {
    66  	restore := squashfs.MockNeedsFuse(false)
    67  	defer restore()
    68  
    69  	info := &snap.Info{
    70  		SideInfo: snap.SideInfo{
    71  			RealName: "foo",
    72  			Revision: snap.R(13),
    73  		},
    74  		Version:       "1.1",
    75  		Architectures: []string{"all"},
    76  	}
    77  	err := backend.AddMountUnit(info, progress.Null)
    78  	c.Assert(err, IsNil)
    79  
    80  	// ensure correct mount unit
    81  	un := fmt.Sprintf("%s.mount", systemd.EscapeUnitNamePath(filepath.Join(dirs.StripRootDir(dirs.SnapMountDir), "foo", "13")))
    82  	c.Assert(filepath.Join(dirs.SnapServicesDir, un), testutil.FileEquals, fmt.Sprintf(`
    83  [Unit]
    84  Description=Mount unit for foo, revision 13
    85  Before=snapd.service
    86  
    87  [Mount]
    88  What=/var/lib/snapd/snaps/foo_13.snap
    89  Where=%s/foo/13
    90  Type=squashfs
    91  Options=nodev,ro,x-gdu.hide
    92  LazyUnmount=yes
    93  
    94  [Install]
    95  WantedBy=multi-user.target
    96  `[1:], dirs.StripRootDir(dirs.SnapMountDir)))
    97  }
    98  
    99  func (s *mountunitSuite) TestRemoveMountUnit(c *C) {
   100  	info := &snap.Info{
   101  		SideInfo: snap.SideInfo{
   102  			RealName: "foo",
   103  			Revision: snap.R(13),
   104  		},
   105  		Version:       "1.1",
   106  		Architectures: []string{"all"},
   107  	}
   108  
   109  	err := backend.AddMountUnit(info, progress.Null)
   110  	c.Assert(err, IsNil)
   111  
   112  	// ensure we have the files
   113  	un := fmt.Sprintf("%s.mount", systemd.EscapeUnitNamePath(filepath.Join(dirs.StripRootDir(dirs.SnapMountDir), "foo", "13")))
   114  	p := filepath.Join(dirs.SnapServicesDir, un)
   115  	c.Assert(osutil.FileExists(p), Equals, true)
   116  
   117  	// now call remove and ensure they are gone
   118  	err = backend.RemoveMountUnit(info.MountDir(), progress.Null)
   119  	c.Assert(err, IsNil)
   120  	p = filepath.Join(dirs.SnapServicesDir, un)
   121  	c.Assert(osutil.FileExists(p), Equals, false)
   122  }