github.com/rigado/snapd@v2.42.5-go-mod+incompatible/features/features_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  package features_test
    20  
    21  import (
    22  	"io/ioutil"
    23  	"os"
    24  	"path/filepath"
    25  	"testing"
    26  
    27  	. "gopkg.in/check.v1"
    28  
    29  	"github.com/snapcore/snapd/dirs"
    30  	"github.com/snapcore/snapd/features"
    31  )
    32  
    33  func Test(t *testing.T) { TestingT(t) }
    34  
    35  type featureSuite struct{}
    36  
    37  var _ = Suite(&featureSuite{})
    38  
    39  func (*featureSuite) TestName(c *C) {
    40  	c.Check(features.Layouts.String(), Equals, "layouts")
    41  	c.Check(features.ParallelInstances.String(), Equals, "parallel-instances")
    42  	c.Check(features.Hotplug.String(), Equals, "hotplug")
    43  	c.Check(features.SnapdSnap.String(), Equals, "snapd-snap")
    44  	c.Check(features.PerUserMountNamespace.String(), Equals, "per-user-mount-namespace")
    45  	c.Check(features.RefreshAppAwareness.String(), Equals, "refresh-app-awareness")
    46  	c.Check(features.RobustMountNamespaceUpdates.String(), Equals, "robust-mount-namespace-updates")
    47  	c.Check(func() { _ = features.SnapdFeature(1000).String() }, PanicMatches, "unknown feature flag code 1000")
    48  }
    49  
    50  func (*featureSuite) TestKnownFeatures(c *C) {
    51  	// Check that known features have names.
    52  	known := features.KnownFeatures()
    53  	for _, f := range known {
    54  		c.Check(f.String(), Not(Equals), "", Commentf("feature code: %d", int(f)))
    55  	}
    56  	c.Check(known, HasLen, features.NumberOfFeatures())
    57  }
    58  
    59  func (*featureSuite) TestIsExported(c *C) {
    60  	c.Check(features.Layouts.IsExported(), Equals, false)
    61  	c.Check(features.Hotplug.IsExported(), Equals, false)
    62  	c.Check(features.SnapdSnap.IsExported(), Equals, false)
    63  
    64  	c.Check(features.ParallelInstances.IsExported(), Equals, true)
    65  	c.Check(features.PerUserMountNamespace.IsExported(), Equals, true)
    66  	c.Check(features.RefreshAppAwareness.IsExported(), Equals, true)
    67  }
    68  
    69  func (*featureSuite) TestIsEnabled(c *C) {
    70  	dirs.SetRootDir(c.MkDir())
    71  	defer dirs.SetRootDir("")
    72  
    73  	// If the feature file is absent then the feature is disabled.
    74  	f := features.PerUserMountNamespace
    75  	c.Check(f.IsEnabled(), Equals, false)
    76  
    77  	// If the feature file is a regular file then the feature is enabled.
    78  	err := os.MkdirAll(dirs.FeaturesDir, 0755)
    79  	c.Assert(err, IsNil)
    80  	err = ioutil.WriteFile(filepath.Join(dirs.FeaturesDir, f.String()), nil, 0644)
    81  	c.Assert(err, IsNil)
    82  	c.Check(f.IsEnabled(), Equals, true)
    83  
    84  	// Features that are not exported cannot be queried.
    85  	c.Check(features.Layouts.IsEnabled, PanicMatches, `cannot check if feature "layouts" is enabled because that feature is not exported`)
    86  }
    87  
    88  func (*featureSuite) TestIsEnabledWhenUnset(c *C) {
    89  	c.Check(features.Layouts.IsEnabledWhenUnset(), Equals, true)
    90  	c.Check(features.ParallelInstances.IsEnabledWhenUnset(), Equals, false)
    91  	c.Check(features.Hotplug.IsEnabledWhenUnset(), Equals, false)
    92  	c.Check(features.SnapdSnap.IsEnabledWhenUnset(), Equals, false)
    93  	c.Check(features.PerUserMountNamespace.IsEnabledWhenUnset(), Equals, false)
    94  	c.Check(features.RefreshAppAwareness.IsEnabledWhenUnset(), Equals, false)
    95  	c.Check(features.RobustMountNamespaceUpdates.IsEnabledWhenUnset(), Equals, false)
    96  }
    97  
    98  func (*featureSuite) TestControlFile(c *C) {
    99  	c.Check(features.PerUserMountNamespace.ControlFile(), Equals, "/var/lib/snapd/features/per-user-mount-namespace")
   100  	c.Check(features.RefreshAppAwareness.ControlFile(), Equals, "/var/lib/snapd/features/refresh-app-awareness")
   101  	c.Check(features.ParallelInstances.ControlFile(), Equals, "/var/lib/snapd/features/parallel-instances")
   102  	c.Check(features.RobustMountNamespaceUpdates.ControlFile(), Equals, "/var/lib/snapd/features/robust-mount-namespace-updates")
   103  	// Features that are not exported don't have a control file.
   104  	c.Check(features.Layouts.ControlFile, PanicMatches, `cannot compute the control file of feature "layouts" because that feature is not exported`)
   105  }
   106  
   107  func (*featureSuite) TestConfigOptionLayouts(c *C) {
   108  	snapName, configName := features.Layouts.ConfigOption()
   109  	c.Check(snapName, Equals, "core")
   110  	c.Check(configName, Equals, "experimental.layouts")
   111  }
   112  
   113  func (*featureSuite) TestConfigOptionRefreshAppAwareness(c *C) {
   114  	snapName, configName := features.RefreshAppAwareness.ConfigOption()
   115  	c.Check(snapName, Equals, "core")
   116  	c.Check(configName, Equals, "experimental.refresh-app-awareness")
   117  }