1 files changed, 70 insertions, 0 deletions
diff --git a/spec/frontend/ide/lib/errors_spec.js b/spec/frontend/ide/lib/errors_spec.js
new file mode 100644
index 00000000000..8c3fb378302
--- /dev/null
+++ b/spec/frontend/ide/lib/errors_spec.js
@@ -0,0 +1,70 @@
+import {
+  createUnexpectedCommitError,
+  createCodeownersCommitError,
+  createBranchChangedCommitError,
+  parseCommitError,
+} from '~/ide/lib/errors';
+
+const TEST_SPECIAL = '&special<';
+const TEST_SPECIAL_ESCAPED = '&amp;special&lt;';
+const TEST_MESSAGE = 'Test message.';
+const CODEOWNERS_MESSAGE =
+  'Push to protected branches that contain changes to files matching CODEOWNERS is not allowed';
+const CHANGED_MESSAGE = 'Things changed since you started editing';
+
+describe('~/ide/lib/errors', () => {
+  const createResponseError = message => ({
+    response: {
+      data: {
+        message,
+      },
+    },
+  });
+
+  describe('createCodeownersCommitError', () => {
+    it('uses given message', () => {
+      expect(createCodeownersCommitError(TEST_MESSAGE)).toEqual({
+        title: 'CODEOWNERS rule violation',
+        messageHTML: TEST_MESSAGE,
+        canCreateBranch: true,
+      });
+    });
+
+    it('escapes special chars', () => {
+      expect(createCodeownersCommitError(TEST_SPECIAL)).toEqual({
+        title: 'CODEOWNERS rule violation',
+        messageHTML: TEST_SPECIAL_ESCAPED,
+        canCreateBranch: true,
+      });
+    });
+  });
+
+  describe('createBranchChangedCommitError', () => {
+    it.each`
+      message         | expectedMessage
+      ${TEST_MESSAGE} | ${`${TEST_MESSAGE}<br/><br/>Would you like to create a new branch?`}
+      ${TEST_SPECIAL} | ${`${TEST_SPECIAL_ESCAPED}<br/><br/>Would you like to create a new branch?`}
+    `('uses given message="$message"', ({ message, expectedMessage }) => {
+      expect(createBranchChangedCommitError(message)).toEqual({
+        title: 'Branch changed',
+        messageHTML: expectedMessage,
+        canCreateBranch: true,
+      });
+    });
+  });
+
+  describe('parseCommitError', () => {
+    it.each`
+      message                                    | expectation
+      ${null}                                    | ${createUnexpectedCommitError()}
+      ${{}}                                      | ${createUnexpectedCommitError()}
+      ${{ response: {} }}                        | ${createUnexpectedCommitError()}
+      ${{ response: { data: {} } }}              | ${createUnexpectedCommitError()}
+      ${createResponseError('test')}             | ${createUnexpectedCommitError()}
+      ${createResponseError(CODEOWNERS_MESSAGE)} | ${createCodeownersCommitError(CODEOWNERS_MESSAGE)}
+      ${createResponseError(CHANGED_MESSAGE)}    | ${createBranchChangedCommitError(CHANGED_MESSAGE)}
+    `('parses message into error object with "$message"', ({ message, expectation }) => {
+      expect(parseCommitError(message)).toEqual(expectation);
+    });
+  });
+});