1 files changed, 13 insertions, 0 deletions
diff --git a/spec/frontend/vue_shared/components/source_viewer/plugins/utils/gemfile_linker_spec.js b/spec/frontend/vue_shared/components/source_viewer/plugins/utils/gemfile_linker_spec.js
new file mode 100644
index 00000000000..4e188c9af7e
--- /dev/null
+++ b/spec/frontend/vue_shared/components/source_viewer/plugins/utils/gemfile_linker_spec.js
@@ -0,0 +1,13 @@
+import gemfileLinker from '~/vue_shared/components/source_viewer/plugins/utils/gemfile_linker';
+
+describe('Highlight.js plugin for linking gemfile dependencies', () => {
+  it('mutates the input value by wrapping dependency names in anchors', () => {
+    const inputValue = 'gem </span><span class="hljs-string">&#39;paranoia&#39;';
+    const outputValue =
+      'gem </span><span class="hljs-string">&#39;<a href="https://rubygems.org/gems/paranoia" target="_blank" rel="nofollow noreferrer noopener">paranoia</a>&#39;';
+    const hljsResultMock = { value: inputValue };
+
+    const output = gemfileLinker(hljsResultMock);
+    expect(output).toBe(outputValue);
+  });
+});