Bugfix: Updates Diff Hashes (#106)

Rather than using branch names we are using the hashes provided directly in the Gitlab API response, to compare the point at which the branch diverged from the target to the head commit. We are additionally flashing a warning if the MR contains a merge conflict.

cmd/git_test.go

@@ -10,6 +10,9 @@ func TestExtractGitInfo_Success(t *testing.T) {
 	getCurrentBranchName := func() (string, error) {
 		return "feature/abc", nil
 	}
+	refreshGitInfo := func() error {
+		return nil
+	}
 	testCases := []struct {
 		getProjectRemoteUrl func() (string, error)
 		expected            GitProjectInfo
@@ -150,7 +153,7 @@ func TestExtractGitInfo_Success(t *testing.T) {
 	}
 	for _, tC := range testCases {
 		t.Run(tC.desc, func(t *testing.T) {
-			actual, err := ExtractGitInfo(tC.getProjectRemoteUrl, getCurrentBranchName)
+			actual, err := ExtractGitInfo(refreshGitInfo, tC.getProjectRemoteUrl, getCurrentBranchName)
 			if err != nil {
 				t.Errorf("No error was expected, got %s", err)
 			}
@@ -165,7 +168,9 @@ func TestExtractGitInfo_FailToGetProjectRemoteUrl(t *testing.T) {
 	getCurrentBranchName := func() (string, error) {
 		return "feature/abc", nil
 	}
-
+	refreshGitInfo := func() error {
+		return nil
+	}
 	testCases := []struct {
 		getProjectRemoteUrl  func() (string, error)
 		expectedErrorMessage string
@@ -188,7 +193,7 @@ func TestExtractGitInfo_FailToGetProjectRemoteUrl(t *testing.T) {
 	}
 	for _, tC := range testCases {
 		t.Run(tC.desc, func(t *testing.T) {
-			_, actualErr := ExtractGitInfo(tC.getProjectRemoteUrl, getCurrentBranchName)
+			_, actualErr := ExtractGitInfo(refreshGitInfo, tC.getProjectRemoteUrl, getCurrentBranchName)
 			if actualErr == nil {
 				t.Errorf("Expected an error, got none")
 			}
@@ -201,11 +206,17 @@ func TestExtractGitInfo_FailToGetProjectRemoteUrl(t *testing.T) {
 
 func TestExtractGitInfo_FailToGetCurrentBranchName(t *testing.T) {
 	expectedErrNestedMsg := "error when getting current branch name"
-	_, actualErr := ExtractGitInfo(func() (string, error) {
-		return "git@custom-gitlab.com:namespace/project.git", nil
-	}, func() (string, error) {
-		return "", errors.New(expectedErrNestedMsg)
-	})
+
+	refreshGitInfo := func() error {
+		return nil
+	}
+	_, actualErr := ExtractGitInfo(refreshGitInfo,
+		func() (string, error) {
+			return "git@custom-gitlab.com:namespace/project.git", nil
+		},
+		func() (string, error) {
+			return "", errors.New(expectedErrNestedMsg)
+		})
 
 	if actualErr == nil {
 		t.Errorf("Expected an error, got none")
@@ -215,3 +226,26 @@ func TestExtractGitInfo_FailToGetCurrentBranchName(t *testing.T) {
 		t.Errorf("\nExpected: %s\nActual:   %s", expectedErr, actualErr)
 	}
 }
+
+func TestRefreshGitRemote_FailToRefreshRemote(t *testing.T) {
+	expectedErrNestedMsg := "error when fetching origin commits"
+	_, actualErr := ExtractGitInfo(
+		func() error {
+			return errors.New(expectedErrNestedMsg)
+		},
+		func() (string, error) {
+			return "git@custom-gitlab.com:namespace/project.git", nil
+		},
+		func() (string, error) {
+			return "feature/abc", nil
+		},
+	)
+
+	if actualErr == nil {
+		t.Errorf("Expected an error, got none")
+	}
+	expectedErr := fmt.Errorf("Could not get latest information from remote: %s", expectedErrNestedMsg)
+	if actualErr.Error() != expectedErr.Error() {
+		t.Errorf("\nExpected: %s\nActual:   %s", expectedErr, actualErr)
+	}
+}