[#674] Prepare for p4 implementation of RollbackLastCommit()

- renamed test cases from restore to revert_local
- renamed git test case from revert to rollback_last_commit
- added p4 rollback_last_commit test case (wip)

src/vcs/git/git_impl_test.go

@@ -429,7 +429,7 @@ func Test_git_commit(t *testing.T) {
 	}
 }
 
-func Test_git_restore(t *testing.T) {
+func Test_git_revert_local(t *testing.T) {
 	testFlags := []struct {
 		desc        string
 		gitError    error
@@ -463,7 +463,7 @@ func Test_git_restore(t *testing.T) {
 	}
 }
 
-func Test_git_revert(t *testing.T) {
+func Test_git_rollback_last_commit(t *testing.T) {
 	testFlags := []struct {
 		desc         string
 		gitError     error

src/vcs/p4/p4_impl.go

@@ -173,8 +173,7 @@ func (p *p4Impl) RevertLocal(path string) error {
 	return p.traceP4("revert", path)
 }
 
-// Revert runs a p4 revert operation.
-// TODO: VCS Revert - p4 revert
+// RollbackLastCommit runs a p4 revert operation.
 func (*p4Impl) RollbackLastCommit() error {
 	return errors.New("VCS revert operation not yet available for p4")
 }

src/vcs/p4/p4_impl_test.go

@@ -508,7 +508,7 @@ func Test_p4_submit(t *testing.T) {
 	}
 }
 
-func Test_p4_restore(t *testing.T) {
+func Test_p4_revert_local(t *testing.T) {
 	testFlags := []struct {
 		desc         string
 		p4Error      error
@@ -556,6 +556,48 @@ func Test_p4_restore(t *testing.T) {
 	}
 }
 
+func Test_p4_rollback_last_commit(t *testing.T) {
+	t.Skip("Work in progress")
+
+	testFlags := []struct {
+		desc         string
+		p4Error      error
+		expectError  bool
+		expectedArgs []string
+	}{
+		{
+			"p4 undo command call succeeds",
+			nil,
+			false,
+			[]string{"undo", "--no-gpg-sign", "--no-edit", "--no-commit", "HEAD"},
+		},
+		{
+			"git revert command call fails",
+			errors.New("git revert error"),
+			true,
+			[]string{"revert", "--no-gpg-sign", "--no-edit", "--no-commit", "HEAD"},
+		},
+	}
+	for _, tt := range testFlags {
+		t.Run(tt.desc, func(t *testing.T) {
+			var actualArgs []string
+			p, _ := newP4Impl(inMemoryDepotInit, "", true)
+			p.traceP4Function = func(args ...string) (err error) {
+				actualArgs = args[2:]
+				return tt.p4Error
+			}
+
+			err := p.RollbackLastCommit()
+			if tt.expectError {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+			assert.Equal(t, tt.expectedArgs, actualArgs)
+		})
+	}
+}
+
 func Test_convert_to_p4_client_path(t *testing.T) {
 	testFlags := []struct {
 		desc          string