Example #1
0
func TestFlushChain(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Success.
			func() ([]byte, error) { return []byte{}, nil },
			// Failure.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec, ProtocolIpv4)
	// Success.
	err := runner.FlushChain(TableNAT, Chain("FOOBAR"))
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if fcmd.CombinedOutputCalls != 1 {
		t.Errorf("expected 1 CombinedOutput() call, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[0]...).HasAll("iptables", "-t", "nat", "-F", "FOOBAR") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[0])
	}
	// Failure.
	err = runner.FlushChain(TableNAT, Chain("FOOBAR"))
	if err == nil {
		t.Errorf("expected failure")
	}
}
Example #2
0
func TestDeleteRuleNew(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// iptables version check
			func() ([]byte, error) { return []byte("iptables v1.9.22"), nil },
			// Success on the first call.
			func() ([]byte, error) { return []byte{}, nil },
			// Success on the second call.
			func() ([]byte, error) { return []byte{}, nil },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// iptables version check
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			// The second Command() call is checking the rule.  Success of that means delete it.
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec, ProtocolIpv4)
	err := runner.DeleteRule(TableNAT, ChainOutput, "abc", "123")
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if fcmd.CombinedOutputCalls != 3 {
		t.Errorf("expected 3 CombinedOutput() calls, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[2]...).HasAll("iptables", "-t", "nat", "-D", "OUTPUT", "abc", "123") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[1])
	}
}
Example #3
0
func TestDeleteRuleErrorCreating(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// iptables version check
			func() ([]byte, error) { return []byte("iptables v1.9.22"), nil },
			// Success on the first call.
			func() ([]byte, error) { return []byte{}, nil },
			// Status 1 on the second call.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// iptables version check
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			// The second Command() call is checking the rule.  Success of that means delete it.
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec, ProtocolIpv4)
	err := runner.DeleteRule(TableNAT, ChainOutput, "abc", "123")
	if err == nil {
		t.Errorf("expected failure")
	}
	if fcmd.CombinedOutputCalls != 3 {
		t.Errorf("expected 3 CombinedOutput() calls, got %d", fcmd.CombinedOutputCalls)
	}
}
Example #4
0
func TestDeleteRuleAlreadyExists(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// iptables version check
			func() ([]byte, error) { return []byte("iptables v1.9.22"), nil },
			// Status 1 on the first call.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// iptables version check
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			// The second Command() call is checking the rule.  Failure of that exec means "does not exist".
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec, ProtocolIpv4)
	err := runner.DeleteRule(TableNAT, ChainOutput, "abc", "123")
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if fcmd.CombinedOutputCalls != 2 {
		t.Errorf("expected 2 CombinedOutput() call, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[1]...).HasAll("iptables", "-t", "nat", "-C", "OUTPUT", "abc", "123") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[0])
	}
}
func TestEnsureRuleErrorCreating(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Status 1 on the first call.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
			// Status 1 on the second call.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// The first Command() call is checking the rule.  Failure of that means create it.
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec)
	_, err := runner.EnsureRule(TableNAT, ChainOutput, "abc", "123")
	if err == nil {
		t.Errorf("expected failure")
	}
	if fcmd.CombinedOutputCalls != 2 {
		t.Errorf("expected 2 CombinedOutput() calls, got %d", fcmd.CombinedOutputCalls)
	}
}
func TestEnsureRuleNew(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Status 1 on the first call.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
			// Success on the second call.
			func() ([]byte, error) { return []byte{}, nil },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// The first Command() call is checking the rule.  Failure of that means create it.
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec)
	exists, err := runner.EnsureRule(TableNAT, ChainOutput, "abc", "123")
	if err != nil {
		t.Errorf("expected success, got %+v", err)
	}
	if exists {
		t.Errorf("expected exists = false")
	}
	if fcmd.CombinedOutputCalls != 2 {
		t.Errorf("expected 2 CombinedOutput() calls, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[1]...).HasAll("iptables", "-t", "nat", "-A", "OUTPUT", "abc", "123") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[1])
	}
}
Example #7
0
func TestGitVolume(t *testing.T) {
	var fcmd exec.FakeCmd
	fcmd = exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			func() ([]byte, error) {
				os.MkdirAll(path.Join(fcmd.Dirs[0], "kubernetes"), 0750)
				return []byte{}, nil
			},
			func() ([]byte, error) { return []byte{}, nil },
			func() ([]byte, error) { return []byte{}, nil },
		},
	}
	fake := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	dir := os.TempDir() + "/git"
	g := GitDir{
		Source:   "https://github.com/GoogleCloudPlatform/kubernetes.git",
		Revision: "2a30ce65c5ab586b98916d83385c5983edd353a1",
		PodID:    "foo",
		RootDir:  dir,
		Name:     "test-pod",
		exec:     &fake,
	}
	err := g.SetUp()
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	expectedCmds := [][]string{
		{"git", "clone", g.Source},
		{"git", "checkout", g.Revision},
		{"git", "reset", "--hard"},
	}
	if fake.CommandCalls != len(expectedCmds) {
		t.Errorf("unexpected command calls: expected 3, saw: %d", fake.CommandCalls)
	}
	if !reflect.DeepEqual(expectedCmds, fcmd.CombinedOutputLog) {
		t.Errorf("unexpected commands: %v, expected: %v", fcmd.CombinedOutputLog, expectedCmds)
	}
	expectedDirs := []string{g.GetPath(), g.GetPath() + "/kubernetes", g.GetPath() + "/kubernetes"}
	if len(fcmd.Dirs) != 3 || !reflect.DeepEqual(expectedDirs, fcmd.Dirs) {
		t.Errorf("unexpected directories: %v, expected: %v", fcmd.Dirs, expectedDirs)
	}
	err = g.TearDown()
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
}
Example #8
0
func testEnsureChain(t *testing.T, protocol Protocol) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Success.
			func() ([]byte, error) { return []byte{}, nil },
			// Exists.
			func() ([]byte, error) { return nil, &exec.FakeExitError{1} },
			// Failure.
			func() ([]byte, error) { return nil, &exec.FakeExitError{2} },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec, protocol)
	// Success.
	exists, err := runner.EnsureChain(TableNAT, Chain("FOOBAR"))
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if exists {
		t.Errorf("expected exists = false")
	}
	if fcmd.CombinedOutputCalls != 1 {
		t.Errorf("expected 1 CombinedOutput() call, got %d", fcmd.CombinedOutputCalls)
	}
	cmd := getIptablesCommand(protocol)
	if !util.NewStringSet(fcmd.CombinedOutputLog[0]...).HasAll(cmd, "-t", "nat", "-N", "FOOBAR") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[0])
	}
	// Exists.
	exists, err = runner.EnsureChain(TableNAT, Chain("FOOBAR"))
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if !exists {
		t.Errorf("expected exists = true")
	}
	// Failure.
	_, err = runner.EnsureChain(TableNAT, Chain("FOOBAR"))
	if err == nil {
		t.Errorf("expected failure")
	}
}
Example #9
0
func TestGetIptablesHasCheckCommand(t *testing.T) {
	testCases := []struct {
		Version  string
		Err      bool
		Expected bool
	}{
		{"iptables v1.4.7", false, false},
		{"iptables v1.4.11", false, true},
		{"iptables v1.4.19.1", false, true},
		{"iptables v2.0.0", false, true},
		{"total junk", true, false},
	}

	for _, testCase := range testCases {
		fcmd := exec.FakeCmd{
			CombinedOutputScript: []exec.FakeCombinedOutputAction{
				func() ([]byte, error) { return []byte(testCase.Version), nil },
			},
		}
		fexec := exec.FakeExec{
			CommandScript: []exec.FakeCommandAction{
				func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			},
		}
		check, err := getIptablesHasCheckCommand(&fexec)
		if (err != nil) != testCase.Err {
			t.Errorf("Expected error: %v, Got error: %v", testCase.Err, err)
		}
		if err == nil && testCase.Expected != check {
			t.Errorf("Expected result: %v, Got result: %v", testCase.Expected, check)
		}
	}
}
Example #10
0
func TestEnsureRuleAlreadyExists(t *testing.T) {
	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Success.
			func() ([]byte, error) { return []byte{}, nil },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// The first Command() call is checking the rule.  Success of that exec means "done".
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := New(&fexec)
	exists, err := runner.EnsureRule(TableNAT, ChainOutput, "abc", "123")
	if err != nil {
		t.Errorf("expected success, got %+v", err)
	}
	if !exists {
		t.Errorf("expected exists = true")
	}
	if fcmd.CombinedOutputCalls != 1 {
		t.Errorf("expected 1 CombinedOutput() call, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[0]...).HasAll("iptables", "-t", "nat", "-C", "OUTPUT", "abc", "123") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[0])
	}
}
Example #11
0
func TestSafeFormatAndMount(t *testing.T) {
	tests := []struct {
		fstype       string
		expectedArgs []string
		err          error
	}{
		{
			fstype:       "ext4",
			expectedArgs: []string{"/dev/foo", "/mnt/bar"},
		},
		{
			fstype:       "vfat",
			expectedArgs: []string{"-m", "mkfs.vfat", "/dev/foo", "/mnt/bar"},
		},
		{
			err: fmt.Errorf("test error"),
		},
	}
	for _, test := range tests {

		var cmdOut string
		var argsOut []string
		fake := exec.FakeExec{
			CommandScript: []exec.FakeCommandAction{
				func(cmd string, args ...string) exec.Cmd {
					cmdOut = cmd
					argsOut = args
					fake := exec.FakeCmd{
						CombinedOutputScript: []exec.FakeCombinedOutputAction{
							func() ([]byte, error) { return []byte{}, test.err },
						},
					}
					return exec.InitFakeCmd(&fake, cmd, args...)
				},
			},
		}

		mounter := gceSafeFormatAndMount{
			runner: &fake,
		}

		err := mounter.Mount("/dev/foo", "/mnt/bar", test.fstype, 0, "")
		if test.err == nil && err != nil {
			t.Errorf("unexpected error: %v", err)
		}
		if test.err != nil {
			if err == nil {
				t.Errorf("unexpected non-error")
			}
			return
		}
		if cmdOut != "/usr/share/google/safe_format_and_mount" {
			t.Errorf("unexpected command: %s", cmdOut)
		}
		if len(argsOut) != len(test.expectedArgs) {
			t.Errorf("unexpected args: %v, expected: %v", argsOut, test.expectedArgs)
		}
	}
}
Example #12
0
func testSetUp(plug volume.VolumePlugin, builder volume.Builder, t *testing.T) {
	var fcmd exec.FakeCmd
	fcmd = exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// git clone
			func() ([]byte, error) {
				os.MkdirAll(path.Join(fcmd.Dirs[0], "kubernetes"), 0750)
				return []byte{}, nil
			},
			// git checkout
			func() ([]byte, error) { return []byte{}, nil },
			// git reset
			func() ([]byte, error) { return []byte{}, nil },
		},
	}
	fake := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	g := builder.(*gitRepoVolumeBuilder)
	g.exec = &fake

	err := g.SetUp()
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	expectedCmds := [][]string{
		{"git", "clone", g.source},
		{"git", "checkout", g.revision},
		{"git", "reset", "--hard"},
	}
	if fake.CommandCalls != len(expectedCmds) {
		t.Errorf("unexpected command calls: expected 3, saw: %d", fake.CommandCalls)
	}
	if !reflect.DeepEqual(expectedCmds, fcmd.CombinedOutputLog) {
		t.Errorf("unexpected commands: %v, expected: %v", fcmd.CombinedOutputLog, expectedCmds)
	}
	expectedDirs := []string{g.GetPath(), g.GetPath() + "/kubernetes", g.GetPath() + "/kubernetes"}
	if len(fcmd.Dirs) != 3 || !reflect.DeepEqual(expectedDirs, fcmd.Dirs) {
		t.Errorf("unexpected directories: %v, expected: %v", fcmd.Dirs, expectedDirs)
	}
}
Example #13
0
func TestCheckRuleWithoutCheckAbsent(t *testing.T) {
	iptables_save_output := `# Generated by iptables-save v1.4.7 on Wed Oct 29 14:56:01 2014
*nat
:PREROUTING ACCEPT [2136997:197881818]
:POSTROUTING ACCEPT [4284525:258542680]
:OUTPUT ACCEPT [5901660:357267963]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER 
COMMIT
# Completed on Wed Oct 29 14:56:01 2014`

	fcmd := exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// Success.
			func() ([]byte, error) { return []byte(iptables_save_output), nil },
		},
	}
	fexec := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			// The first Command() call is checking the rule.  Success of that exec means "done".
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	runner := &runner{exec: &fexec}
	exists, err := runner.checkRuleWithoutCheck(TableNAT, ChainPrerouting, "-m", "addrtype", "-j", "DOCKER")
	if err != nil {
		t.Errorf("expected success, got %v", err)
	}
	if exists {
		t.Errorf("expected exists = false")
	}
	if fcmd.CombinedOutputCalls != 1 {
		t.Errorf("expected 1 CombinedOutput() call, got %d", fcmd.CombinedOutputCalls)
	}
	if !util.NewStringSet(fcmd.CombinedOutputLog[0]...).HasAll("iptables-save", "-t", "nat") {
		t.Errorf("wrong CombinedOutput() log, got %s", fcmd.CombinedOutputLog[0])
	}
}
func TestPlugin(t *testing.T) {
	plugMgr := volume.VolumePluginMgr{}
	plugMgr.InitPlugins(ProbeVolumePlugins(), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
	plug, err := plugMgr.FindPluginByName("kubernetes.io/glusterfs")
	if err != nil {
		t.Errorf("Can't find the plugin by name")
	}
	spec := &api.Volume{
		Name:         "vol1",
		VolumeSource: api.VolumeSource{Glusterfs: &api.GlusterfsVolumeSource{"ep", "vol", false}},
	}
	ep := &api.Endpoints{ObjectMeta: api.ObjectMeta{Name: "foo"}, Subsets: []api.EndpointSubset{{
		Addresses: []api.EndpointAddress{{IP: "127.0.0.1"}}}}}
	var fcmd exec.FakeCmd
	fcmd = exec.FakeCmd{
		CombinedOutputScript: []exec.FakeCombinedOutputAction{
			// mount
			func() ([]byte, error) {
				return []byte{}, nil
			},
		},
	}
	fake := exec.FakeExec{
		CommandScript: []exec.FakeCommandAction{
			func(cmd string, args ...string) exec.Cmd { return exec.InitFakeCmd(&fcmd, cmd, args...) },
		},
	}
	builder, err := plug.(*glusterfsPlugin).newBuilderInternal(volume.NewSpecFromVolume(spec), ep, &api.ObjectReference{UID: types.UID("poduid")}, &mount.FakeMounter{}, &fake)
	volumePath := builder.GetPath()
	if err != nil {
		t.Errorf("Failed to make a new Builder: %v", err)
	}
	if builder == nil {
		t.Errorf("Got a nil Builder: %v")
	}
	path := builder.GetPath()
	if path != "/tmp/fake/pods/poduid/volumes/kubernetes.io~glusterfs/vol1" {
		t.Errorf("Got unexpected path: %s", path)
	}
	if err := builder.SetUp(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volumePath); err != nil {
		if os.IsNotExist(err) {
			t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
		} else {
			t.Errorf("SetUp() failed: %v", err)
		}
	}
	cleaner, err := plug.(*glusterfsPlugin).newCleanerInternal("vol1", types.UID("poduid"), &mount.FakeMounter{})
	if err != nil {
		t.Errorf("Failed to make a new Cleaner: %v", err)
	}
	if cleaner == nil {
		t.Errorf("Got a nil Cleaner: %v")
	}
	if err := cleaner.TearDown(); err != nil {
		t.Errorf("Expected success, got: %v", err)
	}
	if _, err := os.Stat(volumePath); err == nil {
		t.Errorf("TearDown() failed, volume path still exists: %s", volumePath)
	} else if !os.IsNotExist(err) {
		t.Errorf("SetUp() failed: %v", err)
	}
}
func TestSafeFormatAndMount(t *testing.T) {
	tests := []struct {
		fstype        string
		mountOptions  []string
		execScripts   []ExecArgs
		mountErrs     []error
		expectedError error
	}{
		{ // Test a read only mount
			fstype:       "ext4",
			mountOptions: []string{"ro"},
		},
		{ // Test a normal mount
			fstype: "ext4",
		},

		{ // Test that 'file' is called and fails
			fstype:    "ext4",
			mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
			execScripts: []ExecArgs{
				{"file", []string{"-L", "--special-files", "/dev/foo"}, "ext4 filesystem", nil},
			},
			expectedError: fmt.Errorf("unknown filesystem type '(null)'"),
		},
		{ // Test that 'file' is called and confirms unformatted disk, format fails
			fstype:    "ext4",
			mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
			execScripts: []ExecArgs{
				{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
				{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", fmt.Errorf("formatting failed")},
			},
			expectedError: fmt.Errorf("formatting failed"),
		},
		{ // Test that 'file' is called and confirms unformatted disk, format passes, second mount fails
			fstype:    "ext4",
			mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), fmt.Errorf("Still cannot mount")},
			execScripts: []ExecArgs{
				{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
				{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
			},
			expectedError: fmt.Errorf("Still cannot mount"),
		},
		{ // Test that 'file' is called and confirms unformatted disk, format passes, second mount passes
			fstype:    "ext4",
			mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
			execScripts: []ExecArgs{
				{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
				{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
			},
			expectedError: nil,
		},
		{ // Test that 'file' is called and confirms unformatted disk, format passes, second mount passes with ext3
			fstype:    "ext3",
			mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
			execScripts: []ExecArgs{
				{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
				{"mkfs.ext3", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
			},
			expectedError: nil,
		},
	}

	for _, test := range tests {
		commandScripts := []exec.FakeCommandAction{}
		for _, expected := range test.execScripts {
			ecmd := expected.command
			eargs := expected.args
			output := expected.output
			err := expected.err
			commandScript := func(cmd string, args ...string) exec.Cmd {
				if cmd != ecmd {
					t.Errorf("Unexpected command %s. Expecting %s", cmd, ecmd)
				}

				for j := range args {
					if args[j] != eargs[j] {
						t.Errorf("Unexpected args %v. Expecting %v", args, eargs)
					}
				}
				fake := exec.FakeCmd{
					CombinedOutputScript: []exec.FakeCombinedOutputAction{
						func() ([]byte, error) { return []byte(output), err },
					},
				}
				return exec.InitFakeCmd(&fake, cmd, args...)
			}
			commandScripts = append(commandScripts, commandScript)
		}

		fake := exec.FakeExec{
			CommandScript: commandScripts,
		}

		fakeMounter := ErrorMounter{&FakeMounter{}, 0, test.mountErrs}
		mounter := SafeFormatAndMount{
			Interface: &fakeMounter,
			Runner:    &fake,
		}

		device := "/dev/foo"
		dest := "/mnt/bar"
		err := mounter.Mount(device, dest, test.fstype, test.mountOptions)
		if test.expectedError == nil {
			if err != nil {
				t.Errorf("unexpected non-error: %v", err)
			}

			// Check that something was mounted on the directory
			isMountPoint, err := fakeMounter.IsMountPoint(dest)
			if err != nil || !isMountPoint {
				t.Errorf("the directory was not mounted")
			}

			//check that the correct device was mounted
			mountedDevice, _, err := GetDeviceNameFromMount(fakeMounter.FakeMounter, dest)
			if err != nil || mountedDevice != device {
				t.Errorf("the correct device was not mounted")
			}
		} else {
			if err == nil || test.expectedError.Error() != err.Error() {
				t.Errorf("unexpected error: %v. Expecting %v", err, test.expectedError)
			}
		}
	}
}