func (s *toolsSuite) testFindToolsExact(c *gc.C, t common.ToolsStorageGetter, inStorage bool, develVersion bool) {
	var called bool
	s.PatchValue(common.EnvtoolsFindTools, func(e environs.Environ, major, minor int, stream string, filter coretools.Filter) (list coretools.List, err error) {
		called = true
		c.Assert(filter.Number, gc.Equals, version.Current.Number)
		c.Assert(filter.Series, gc.Equals, series.HostSeries())
		c.Assert(filter.Arch, gc.Equals, arch.HostArch())
		if develVersion {
			c.Assert(stream, gc.Equals, "devel")
		} else {
			c.Assert(stream, gc.Equals, "released")
		}
		return nil, errors.NotFoundf("tools")
	})
	toolsFinder := common.NewToolsFinder(s.State, t, sprintfURLGetter("tools:%s"))
	result, err := toolsFinder.FindTools(params.FindToolsParams{
		Number:       version.Current.Number,
		MajorVersion: -1,
		MinorVersion: -1,
		Series:       series.HostSeries(),
		Arch:         arch.HostArch(),
	})
	c.Assert(err, jc.ErrorIsNil)
	if inStorage {
		c.Assert(result.Error, gc.IsNil)
		c.Assert(called, jc.IsFalse)
	} else {
		c.Assert(result.Error, gc.ErrorMatches, "tools not found")
		c.Assert(called, jc.IsTrue)
	}
}

// Bootstrap is specified in the Environ interface.
func (env *localEnviron) Bootstrap(ctx environs.BootstrapContext, args environs.BootstrapParams) (string, string, environs.BootstrapFinalizer, error) {
	if err := ensureNotRoot(); err != nil {
		return "", "", nil, err
	}

	// Make sure there are tools available for the
	// host's architecture and series.
	if _, err := args.AvailableTools.Match(tools.Filter{
		Arch:   arch.HostArch(),
		Series: series.HostSeries(),
	}); err != nil {
		return "", "", nil, err
	}

	cfg, err := env.Config().Apply(map[string]interface{}{
		// Record the bootstrap IP, so the containers know where to go for storage.
		"bootstrap-ip": env.bridgeAddress,
	})
	if err == nil {
		err = env.SetConfig(cfg)
	}
	if err != nil {
		logger.Errorf("failed to apply bootstrap-ip to config: %v", err)
		return "", "", nil, err
	}
	return arch.HostArch(), series.HostSeries(), env.finishBootstrap, nil
}

func (s *format_1_18Suite) TestMissingAttributes(c *gc.C) {
	logDir, err := paths.LogDir(series.HostSeries())
	c.Assert(err, jc.ErrorIsNil)
	realDataDir, err := paths.DataDir(series.HostSeries())
	c.Assert(err, jc.ErrorIsNil)

	realDataDir = filepath.FromSlash(realDataDir)
	logPath := filepath.Join(logDir, "juju")
	logPath = filepath.FromSlash(logPath)

	dataDir := c.MkDir()
	configPath := filepath.Join(dataDir, agentConfigFilename)
	err = utils.AtomicWriteFile(configPath, []byte(configData1_18WithoutUpgradedToVersion), 0600)
	c.Assert(err, jc.ErrorIsNil)
	readConfig, err := ReadConfig(configPath)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(readConfig.UpgradedToVersion(), gc.Equals, version.MustParse("1.16.0"))
	configLogDir := filepath.FromSlash(readConfig.LogDir())
	configDataDir := filepath.FromSlash(readConfig.DataDir())
	c.Assert(configLogDir, gc.Equals, logPath)
	c.Assert(configDataDir, gc.Equals, realDataDir)
	c.Assert(readConfig.PreferIPv6(), jc.IsFalse)
	// The api info doesn't have the environment tag set.
	c.Assert(readConfig.APIInfo().EnvironTag.Id(), gc.Equals, "")
}

func (s *uploadSuite) TestUploadFakeSeries(c *gc.C) {
	seriesToUpload := "precise"
	if seriesToUpload == series.HostSeries() {
		seriesToUpload = "raring"
	}
	t, err := sync.Upload(s.targetStorage, "released", nil, "quantal", seriesToUpload)
	c.Assert(err, jc.ErrorIsNil)
	s.assertUploadedTools(c, t, []string{seriesToUpload, "quantal", series.HostSeries()}, "released")
}

func (s *uploadSuite) TestSyncToolsFakeSeries(c *gc.C) {
	seriesToUpload := "precise"
	if seriesToUpload == series.HostSeries() {
		seriesToUpload = "raring"
	}
	builtTools, err := sync.BuildToolsTarball(nil, "testing")
	c.Assert(err, jc.ErrorIsNil)

	t, err := sync.SyncBuiltTools(s.targetStorage, "testing", builtTools, "quantal", seriesToUpload)
	c.Assert(err, jc.ErrorIsNil)
	s.assertUploadedTools(c, t, []string{seriesToUpload, "quantal", series.HostSeries()}, "testing")
}

func (*CurrentSuite) TestCurrentSeries(c *gc.C) {
	s := series.HostSeries()
	if s == "unknown" {
		s = "n/a"
	}
	out, err := exec.Command("lsb_release", "-c").CombinedOutput()

	if err != nil {
		// If the command fails (for instance if we're running on some other
		// platform) then CurrentSeries should be unknown.
		switch runtime.GOOS {
		case "darwin":
			c.Check(s, gc.Matches, `mavericks|mountainlion|lion|snowleopard`)
		case "windows":
			c.Check(s, gc.Matches, `win2012hvr2|win2012hv|win2012|win2012r2|win8|win81|win7`)
		default:
			current_os, err := series.GetOSFromSeries(s)
			c.Assert(err, gc.IsNil)
			if s != "n/a" {
				// There is no lsb_release command on CentOS.
				if current_os == os.CentOS {
					c.Check(s, gc.Matches, `centos7`)
				}
			}
		}
	} else {
		c.Assert(string(out), gc.Equals, "Codename:\t"+s+"\n")
	}
}

func (s *prereqsSuite) SetUpTest(c *gc.C) {
	s.BaseSuite.SetUpTest(c)
	s.tmpdir = c.MkDir()
	s.testMongodPath = filepath.Join(s.tmpdir, "mongod")

	s.PatchEnvironment("PATH", s.tmpdir)

	s.PatchValue(&mongo.JujuMongodPath, "/somewhere/that/wont/exist")

	os.Setenv("JUJUTEST_LSB_RELEASE_ID", "Ubuntu")
	err := ioutil.WriteFile(filepath.Join(s.tmpdir, "lsb_release"), []byte(lsbrelease), 0777)
	c.Assert(err, jc.ErrorIsNil)

	// symlink $temp/dpkg-query to /bin/true, to
	// simulate package installation query responses.
	pm, err := testing.GetPackageManager()
	c.Assert(err, jc.ErrorIsNil)

	err = symlink.New("/bin/true", filepath.Join(s.tmpdir, pm.PackageQuery))
	c.Assert(err, jc.ErrorIsNil)
	s.PatchValue(&isPackageInstalled, func(pack string) bool {
		pacman, err := manager.NewPackageManager(series.HostSeries())
		c.Assert(err, jc.ErrorIsNil)
		return pacman.IsInstalled(pack)
	})
}

// ListServices lists all installed services on the running system
func ListServices() ([]string, error) {
	initName, err := VersionInitSystem(series.HostSeries())
	if err != nil {
		return nil, errors.Trace(err)
	}

	switch initName {
	case InitSystemWindows:
		services, err := windows.ListServices()
		if err != nil {
			return nil, errors.Annotatef(err, "failed to list %s services", initName)
		}
		return services, nil
	case InitSystemUpstart:
		services, err := upstart.ListServices()
		if err != nil {
			return nil, errors.Annotatef(err, "failed to list %s services", initName)
		}
		return services, nil
	case InitSystemSystemd:
		services, err := systemd.ListServices()
		if err != nil {
			return nil, errors.Annotatef(err, "failed to list %s services", initName)
		}
		return services, nil
	default:
		return nil, errors.NotFoundf("init system %q", initName)
	}
}

func (s *uploadSuite) TestUpload(c *gc.C) {
	t, err := sync.Upload(s.targetStorage, "released", nil)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(t.Version, gc.Equals, version.Current)
	c.Assert(t.URL, gc.Not(gc.Equals), "")
	s.assertUploadedTools(c, t, []string{series.HostSeries()}, "released")
}

func getContainerInstance() (cont []ContainerInstance, err error) {
	current_os, err := series.GetOSFromSeries(series.HostSeries())
	if err != nil {
		return nil, err
	}

	switch current_os {
	case jujuos.CentOS:
		cont = []ContainerInstance{
			{instance.LXC, [][]string{
				{"lxc"},
				{"cloud-image-utils"},
			}},
			{instance.KVM, [][]string{
				{"uvtool-libvirt"},
				{"uvtool"},
			}},
		}
	default:
		cont = []ContainerInstance{
			{instance.LXC, [][]string{
				{"--target-release", "precise-updates/cloud-tools", "lxc"},
				{"--target-release", "precise-updates/cloud-tools", "cloud-image-utils"},
			}},
			{instance.KVM, [][]string{
				{"uvtool-libvirt"},
				{"uvtool"},
			}},
		}
	}

	return cont, nil
}

func (e *bootstrapEnviron) Bootstrap(ctx environs.BootstrapContext, args environs.BootstrapParams) (string, string, environs.BootstrapFinalizer, error) {
	e.bootstrapCount++
	e.args = args
	finalizer := func(_ environs.BootstrapContext, icfg *instancecfg.InstanceConfig) error {
		e.finalizerCount++
		e.instanceConfig = icfg
		return nil
	}
	return arch.HostArch(), series.HostSeries(), finalizer, nil
}

// DiscoverService returns an interface to a service appropriate
// for the current system
func DiscoverService(name string, conf common.Conf) (Service, error) {
	initName, err := discoverInitSystem()
	if err != nil {
		return nil, errors.Trace(err)
	}

	service, err := newService(name, conf, initName, series.HostSeries())
	if err != nil {
		return nil, errors.Trace(err)
	}
	return service, nil
}

func (s *provisionerSuite) testFindTools(c *gc.C, matchArch bool, apiError, logicError error) {
	var toolsList = coretools.List{&coretools.Tools{Version: version.Current}}
	var called bool
	var a string
	if matchArch {
		// if matchArch is true, this will be overwriten with the host's arch, otherwise
		// leave a blank.
		a = arch.HostArch()
	}

	provisioner.PatchFacadeCall(s, s.provisioner, func(request string, args, response interface{}) error {
		called = true
		c.Assert(request, gc.Equals, "FindTools")
		expected := params.FindToolsParams{
			Number:       version.Current.Number,
			Series:       series.HostSeries(),
			Arch:         a,
			MinorVersion: -1,
			MajorVersion: -1,
		}
		c.Assert(args, gc.Equals, expected)
		result := response.(*params.FindToolsResult)
		result.List = toolsList
		if logicError != nil {
			result.Error = common.ServerError(logicError)
		}
		return apiError
	})
	apiList, err := s.provisioner.FindTools(version.Current.Number, series.HostSeries(), a)
	c.Assert(called, jc.IsTrue)
	if apiError != nil {
		c.Assert(err, gc.Equals, apiError)
	} else if logicError != nil {
		c.Assert(err.Error(), gc.Equals, logicError.Error())
	} else {
		c.Assert(err, jc.ErrorIsNil)
		c.Assert(apiList, jc.SameContents, toolsList)
	}
}

func (s *ProxyUpdaterSuite) TestInitialState(c *gc.C) {
	proxySettings, aptProxySettings := s.updateConfig(c)

	updater := proxyupdater.New(s.environmentAPI, true)
	defer worker.Stop(updater)

	s.waitProxySettings(c, proxySettings)
	s.waitForFile(c, s.proxyFile, proxySettings.AsScriptEnvironment()+"\n")

	paccmder, err := commands.NewPackageCommander(series.HostSeries())
	c.Assert(err, jc.ErrorIsNil)
	s.waitForFile(c, pacconfig.AptProxyConfigFile, paccmder.ProxyConfigContents(aptProxySettings)+"\n")
}

func (w *proxyWorker) writeEnvironment() error {
	// TODO(dfc) this should be replaced with a switch on os.HostOS()
	osystem, err := series.GetOSFromSeries(series.HostSeries())
	if err != nil {
		return err
	}
	switch osystem {
	case os.Windows:
		return w.writeEnvironmentToRegistry()
	default:
		return w.writeEnvironmentFile()
	}
}

func minimalConfig(c *gc.C) *config.Config {
	attrs := map[string]interface{}{
		"name":            "whatever",
		"type":            "anything, really",
		"uuid":            coretesting.EnvironmentTag.Id(),
		"ca-cert":         coretesting.CACert,
		"ca-private-key":  coretesting.CAKey,
		"authorized-keys": coretesting.FakeAuthKeys,
		"default-series":  series.HostSeries(),
	}
	cfg, err := config.New(config.UseDefaults, attrs)
	c.Assert(err, jc.ErrorIsNil)
	return cfg
}

func uploadFakeTools(stor storage.Storage, toolsDir, stream string) error {
	toolsSeries := set.NewStrings(toolsLtsSeries...)
	toolsSeries.Add(series.HostSeries())
	var versions []version.Binary
	for _, series := range toolsSeries.Values() {
		vers := version.Current
		vers.Series = series
		versions = append(versions, vers)
	}
	if _, err := UploadFakeToolsVersions(stor, toolsDir, stream, versions...); err != nil {
		return err
	}
	return nil
}

func (s *discoverySuite) TestDiscoverServiceLocalHost(c *gc.C) {
	var localInitSystem string
	var err error
	switch runtime.GOOS {
	case "windows":
		localInitSystem = service.InitSystemWindows
	case "linux":
		localInitSystem, err = service.VersionInitSystem(series.HostSeries())
	}
	c.Assert(err, gc.IsNil)

	test := discoveryTest{
		os:       version.Current.OS,
		series:   series.HostSeries(),
		expected: localInitSystem,
	}
	test.disableVersionDiscovery(s)

	svc, err := service.DiscoverService(s.name, s.conf)
	c.Assert(err, jc.ErrorIsNil)

	test.checkService(c, svc, err, s.name, s.conf)
}

func (s *BootstrapSuite) testToolsMetadata(c *gc.C, exploded bool) {
	envtesting.RemoveFakeToolsMetadata(c, s.toolsStorage)

	_, cmd, err := s.initBootstrapCommand(c, nil, "--env-config", s.b64yamlEnvcfg, "--instance-id", string(s.instanceId))
	c.Assert(err, jc.ErrorIsNil)
	err = cmd.Run(nil)
	c.Assert(err, jc.ErrorIsNil)

	// We don't write metadata at bootstrap anymore.
	simplestreamsMetadata, err := envtools.ReadMetadata(s.toolsStorage, "released")
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(simplestreamsMetadata, gc.HasLen, 0)

	// The tools should have been added to tools storage, and
	// exploded into each of the supported series of
	// the same operating system if the tools were uploaded.
	st, err := state.Open(testing.EnvironmentTag, &mongo.MongoInfo{
		Info: mongo.Info{
			Addrs:  []string{gitjujutesting.MgoServer.Addr()},
			CACert: testing.CACert,
		},
		Password: testPasswordHash(),
	}, mongo.DefaultDialOpts(), environs.NewStatePolicy())
	c.Assert(err, jc.ErrorIsNil)
	defer st.Close()
	expectedSeries := make(set.Strings)
	if exploded {
		for _, ser := range series.SupportedSeries() {
			os, err := series.GetOSFromSeries(ser)
			c.Assert(err, jc.ErrorIsNil)
			hostos, err := series.GetOSFromSeries(version.Current.Series)
			c.Assert(err, jc.ErrorIsNil)
			if os == hostos {
				expectedSeries.Add(ser)
			}
		}
	} else {
		expectedSeries.Add(series.HostSeries())
	}

	storage, err := st.ToolsStorage()
	c.Assert(err, jc.ErrorIsNil)
	defer storage.Close()
	metadata, err := storage.AllMetadata()
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(metadata, gc.HasLen, expectedSeries.Size())
	for _, m := range metadata {
		c.Assert(expectedSeries.Contains(m.Version.Series), jc.IsTrue)
	}
}

// RemoveFakeTools deletes the fake tools from the supplied storage.
func RemoveFakeTools(c *gc.C, stor storage.Storage, toolsDir string) {
	c.Logf("removing fake tools")
	toolsVersion := version.Current
	name := envtools.StorageName(toolsVersion, toolsDir)
	err := stor.Remove(name)
	c.Check(err, jc.ErrorIsNil)
	defaultSeries := coretesting.FakeDefaultSeries
	if series.HostSeries() != defaultSeries {
		toolsVersion.Series = defaultSeries
		name := envtools.StorageName(toolsVersion, toolsDir)
		err := stor.Remove(name)
		c.Check(err, jc.ErrorIsNil)
	}
	RemoveFakeToolsMetadata(c, stor)
}