1 files changed, 31 insertions, 0 deletions
diff --git a/spec/frontend/blob_edit/edit_blob_spec.js b/spec/frontend/blob_edit/edit_blob_spec.js
new file mode 100644
index 00000000000..9642b55b9b4
--- /dev/null
+++ b/spec/frontend/blob_edit/edit_blob_spec.js
@@ -0,0 +1,31 @@
+import EditBlob from '~/blob_edit/edit_blob';
+import EditorLite from '~/editor/editor_lite';
+import MarkdownExtension from '~/editor/editor_markdown_ext';
+
+jest.mock('~/editor/editor_lite');
+jest.mock('~/editor/editor_markdown_ext');
+
+describe('Blob Editing', () => {
+  beforeEach(() => {
+    setFixtures(
+      `<div class="js-edit-blob-form"><div id="file_path"></div><div id="iditor"></div><input id="file-content"></div>`,
+    );
+  });
+
+  const initEditor = (isMarkdown = false) => {
+    return new EditBlob({
+      isMarkdown,
+      monacoEnabled: true,
+    });
+  };
+
+  it('does not load MarkdownExtension by default', async () => {
+    await initEditor();
+    expect(EditorLite.prototype.use).not.toHaveBeenCalled();
+  });
+
+  it('loads MarkdownExtension only for the markdown files', async () => {
+    await initEditor(true);
+    expect(EditorLite.prototype.use).toHaveBeenCalledWith(MarkdownExtension);
+  });
+});