Add an action log to FakeMounter.

# *** ERROR: *** docs are out of sync between cli and markdown
# run hack/run-gendocs.sh > docs/kubectl.md to regenerate

#
# Your commit will be aborted unless you regenerate docs.
    COMMIT_BLOCKED_ON_GENDOCS

pkg/util/mount/fake.go

@@ -16,16 +16,35 @@ limitations under the License.
 
 package mount
 
-// FakeMounter implements mount.Interface.
+// FakeMounter implements mount.Interface for tests.
 type FakeMounter struct {
 	MountPoints []MountPoint
+	Log         []FakeAction
+}
+
+// Values for FakeAction.Action
+const FakeActionMount = "mount"
+const FakeActionUnmount = "unmount"
+
+// FakeAction objects are logged every time a fake mount or unmount is called.
+type FakeAction struct {
+	Action string // "mount" or "unmount"
+	Target string // applies to both mount and unmount actions
+	Source string // applies only to "mount" actions
+	FSType string // applies only to "mount" actions
+}
+
+func (f *FakeMounter) ResetLog() {
+	f.Log = []FakeAction{}
 }
 
 func (f *FakeMounter) Mount(source string, target string, fstype string, flags uintptr, data string) error {
+	f.Log = append(f.Log, FakeAction{Action: FakeActionMount, Target: target, Source: source, FSType: fstype})
 	return nil
 }
 
 func (f *FakeMounter) Unmount(target string, flags int) error {
+	f.Log = append(f.Log, FakeAction{Action: FakeActionUnmount, Target: target})
 	return nil
 }
 

pkg/util/mount/mount_linux_test.go

@@ -94,7 +94,7 @@ func slicesEqual(a, b []string) bool {
 
 func TestGetMountRefs(t *testing.T) {
 	fm := &FakeMounter{
-		[]MountPoint{
+		MountPoints: []MountPoint{
 			{Device: "/dev/sdb", Path: "/var/lib/kubelet/plugins/kubernetes.io/gce-pd/mounts/gce-pd"},
 			{Device: "/dev/sdb", Path: "/var/lib/kubelet/pods/some-pod/volumes/kubernetes.io~gce-pd/gce-pd-in-pod"},
 			{Device: "/dev/sdc", Path: "/var/lib/kubelet/plugins/kubernetes.io/gce-pd/mounts/gce-pd2"},