1 files changed, 38 insertions, 0 deletions
diff --git a/spec/frontend/ref/format_refs_spec.js b/spec/frontend/ref/format_refs_spec.js
new file mode 100644
index 00000000000..6dd49574721
--- /dev/null
+++ b/spec/frontend/ref/format_refs_spec.js
@@ -0,0 +1,38 @@
+import { formatListBoxItems, formatErrors } from '~/ref/format_refs';
+import { DEFAULT_I18N } from '~/ref/constants';
+import {
+  MOCK_BRANCHES,
+  MOCK_COMMITS,
+  MOCK_ERROR,
+  MOCK_TAGS,
+  FORMATTED_BRANCHES,
+  FORMATTED_TAGS,
+  FORMATTED_COMMITS,
+} from './mock_data';
+
+describe('formatListBoxItems', () => {
+  it.each`
+    branches         | tags         | commits         | expectedResult
+    ${MOCK_BRANCHES} | ${MOCK_TAGS} | ${MOCK_COMMITS} | ${[FORMATTED_BRANCHES, FORMATTED_TAGS, FORMATTED_COMMITS]}
+    ${MOCK_BRANCHES} | ${[]}        | ${MOCK_COMMITS} | ${[FORMATTED_BRANCHES, FORMATTED_COMMITS]}
+    ${[]}            | ${[]}        | ${MOCK_COMMITS} | ${[FORMATTED_COMMITS]}
+    ${undefined}     | ${undefined} | ${MOCK_COMMITS} | ${[FORMATTED_COMMITS]}
+    ${MOCK_BRANCHES} | ${undefined} | ${null}         | ${[FORMATTED_BRANCHES]}
+  `('should correctly format listbox items', ({ branches, tags, commits, expectedResult }) => {
+    expect(formatListBoxItems(branches, tags, commits)).toEqual(expectedResult);
+  });
+});
+
+describe('formatErrors', () => {
+  const { branchesErrorMessage, tagsErrorMessage, commitsErrorMessage } = DEFAULT_I18N;
+  it.each`
+    branches      | tags          | commits       | expectedResult
+    ${MOCK_ERROR} | ${MOCK_ERROR} | ${MOCK_ERROR} | ${[branchesErrorMessage, tagsErrorMessage, commitsErrorMessage]}
+    ${MOCK_ERROR} | ${[]}         | ${MOCK_ERROR} | ${[branchesErrorMessage, commitsErrorMessage]}
+    ${[]}         | ${[]}         | ${MOCK_ERROR} | ${[commitsErrorMessage]}
+    ${undefined}  | ${undefined}  | ${MOCK_ERROR} | ${[commitsErrorMessage]}
+    ${MOCK_ERROR} | ${undefined}  | ${null}       | ${[branchesErrorMessage]}
+  `('should correctly format listbox errors', ({ branches, tags, commits, expectedResult }) => {
+    expect(formatErrors(branches, tags, commits)).toEqual(expectedResult);
+  });
+});