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state_test.go
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state_test.go
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// Copyright 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package common_test
import (
"io/ioutil"
"os"
"path/filepath"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
goyaml "gopkg.in/yaml.v2"
"github.com/juju/juju/core/instance"
"github.com/juju/juju/environs"
"github.com/juju/juju/environs/storage"
envtesting "github.com/juju/juju/environs/testing"
"github.com/juju/juju/provider/common"
coretesting "github.com/juju/juju/testing"
)
type StateSuite struct {
coretesting.BaseSuite
}
var _ = gc.Suite(&StateSuite{})
func (suite *StateSuite) newStorageWithDataDir(c *gc.C) (storage.Storage, string) {
closer, stor, dataDir := envtesting.CreateLocalTestStorage(c)
suite.AddCleanup(func(*gc.C) { closer.Close() })
envtesting.UploadFakeTools(c, stor, "released", "released")
return stor, dataDir
}
func (suite *StateSuite) newStorage(c *gc.C) storage.Storage {
stor, _ := suite.newStorageWithDataDir(c)
return stor
}
func (suite *StateSuite) TestCreateStateFileWritesEmptyStateFile(c *gc.C) {
stor := suite.newStorage(c)
url, err := common.CreateStateFile(stor)
c.Assert(err, jc.ErrorIsNil)
reader, err := storage.Get(stor, common.StateFile)
c.Assert(err, jc.ErrorIsNil)
data, err := ioutil.ReadAll(reader)
c.Assert(err, jc.ErrorIsNil)
c.Check(string(data), gc.Equals, "")
c.Assert(url, gc.NotNil)
expectedURL, err := stor.URL(common.StateFile)
c.Assert(err, jc.ErrorIsNil)
c.Check(url, gc.Equals, expectedURL)
}
func (suite *StateSuite) TestDeleteStateFile(c *gc.C) {
closer, stor, dataDir := envtesting.CreateLocalTestStorage(c)
defer closer.Close()
err := common.DeleteStateFile(stor)
c.Assert(err, jc.ErrorIsNil) // doesn't exist, juju don't care
_, err = common.CreateStateFile(stor)
c.Assert(err, jc.ErrorIsNil)
_, err = os.Stat(filepath.Join(dataDir, common.StateFile))
c.Assert(err, jc.ErrorIsNil)
err = common.DeleteStateFile(stor)
c.Assert(err, jc.ErrorIsNil)
_, err = os.Stat(filepath.Join(dataDir, common.StateFile))
c.Assert(err, jc.Satisfies, os.IsNotExist)
}
func (suite *StateSuite) TestSaveStateWritesStateFile(c *gc.C) {
stor := suite.newStorage(c)
state := common.BootstrapState{
StateInstances: []instance.Id{instance.Id("an-instance-id")},
}
marshaledState, err := goyaml.Marshal(state)
c.Assert(err, jc.ErrorIsNil)
err = common.SaveState(stor, &state)
c.Assert(err, jc.ErrorIsNil)
loadedState, err := storage.Get(stor, common.StateFile)
c.Assert(err, jc.ErrorIsNil)
content, err := ioutil.ReadAll(loadedState)
c.Assert(err, jc.ErrorIsNil)
c.Check(content, gc.DeepEquals, marshaledState)
}
func (suite *StateSuite) setUpSavedState(c *gc.C, dataDir string) common.BootstrapState {
state := common.BootstrapState{
StateInstances: []instance.Id{instance.Id("an-instance-id")},
}
content, err := goyaml.Marshal(state)
c.Assert(err, jc.ErrorIsNil)
err = ioutil.WriteFile(filepath.Join(dataDir, common.StateFile), content, 0644)
c.Assert(err, jc.ErrorIsNil)
return state
}
func (suite *StateSuite) TestLoadStateReadsStateFile(c *gc.C) {
storage, dataDir := suite.newStorageWithDataDir(c)
state := suite.setUpSavedState(c, dataDir)
storedState, err := common.LoadState(storage)
c.Assert(err, jc.ErrorIsNil)
c.Check(*storedState, gc.DeepEquals, state)
}
func (suite *StateSuite) TestLoadStateMissingFile(c *gc.C) {
stor := suite.newStorage(c)
_, err := common.LoadState(stor)
c.Check(err, gc.Equals, environs.ErrNotBootstrapped)
}
func (suite *StateSuite) TestLoadStateIntegratesWithSaveState(c *gc.C) {
storage := suite.newStorage(c)
state := common.BootstrapState{
StateInstances: []instance.Id{instance.Id("an-instance-id")},
}
err := common.SaveState(storage, &state)
c.Assert(err, jc.ErrorIsNil)
storedState, err := common.LoadState(storage)
c.Assert(err, jc.ErrorIsNil)
c.Check(*storedState, gc.DeepEquals, state)
}
func (suite *StateSuite) TestAddStateInstance(c *gc.C) {
storage := suite.newStorage(c)
for _, str := range []string{"a", "b", "c"} {
id := instance.Id(str)
err := common.AddStateInstance(storage, id)
c.Assert(err, jc.ErrorIsNil)
}
storedState, err := common.LoadState(storage)
c.Assert(err, jc.ErrorIsNil)
c.Check(storedState, gc.DeepEquals, &common.BootstrapState{
StateInstances: []instance.Id{
instance.Id("a"),
instance.Id("b"),
instance.Id("c"),
},
})
}
func (suite *StateSuite) TestRemoveStateInstancesPartial(c *gc.C) {
storage := suite.newStorage(c)
state := common.BootstrapState{
StateInstances: []instance.Id{
instance.Id("a"),
instance.Id("b"),
instance.Id("c"),
},
}
err := common.SaveState(storage, &state)
c.Assert(err, jc.ErrorIsNil)
err = common.RemoveStateInstances(
storage,
state.StateInstances[0],
instance.Id("not-there"),
state.StateInstances[2],
)
c.Assert(err, jc.ErrorIsNil)
storedState, err := common.LoadState(storage)
c.Assert(err, jc.ErrorIsNil)
c.Assert(storedState, gc.DeepEquals, &common.BootstrapState{
StateInstances: []instance.Id{
state.StateInstances[1],
},
})
}
func (suite *StateSuite) TestRemoveStateInstancesNone(c *gc.C) {
storage := suite.newStorage(c)
state := common.BootstrapState{
StateInstances: []instance.Id{instance.Id("an-instance-id")},
}
err := common.SaveState(storage, &state)
c.Assert(err, jc.ErrorIsNil)
err = common.RemoveStateInstances(
storage,
instance.Id("not-there"),
)
c.Assert(err, jc.ErrorIsNil)
storedState, err := common.LoadState(storage)
c.Assert(err, jc.ErrorIsNil)
c.Assert(storedState, gc.DeepEquals, &state)
}
func (suite *StateSuite) TestRemoveStateInstancesNoProviderState(c *gc.C) {
storage := suite.newStorage(c)
err := common.RemoveStateInstances(storage, instance.Id("id"))
// No error if the id is missing, so no error if the entire
// provider-state file is missing. This is the case if
// bootstrap failed.
c.Assert(err, jc.ErrorIsNil)
}