1 files changed, 49 insertions, 0 deletions
diff --git a/spec/javascripts/copy_as_gfm_spec.js b/spec/javascripts/copy_as_gfm_spec.js
new file mode 100644
index 00000000000..ded450749d3
--- /dev/null
+++ b/spec/javascripts/copy_as_gfm_spec.js
@@ -0,0 +1,49 @@
+import '~/copy_as_gfm';
+
+(() => {
+  describe('gl.CopyAsGFM', () => {
+    describe('gl.CopyAsGFM.pasteGFM', () => {
+      function callPasteGFM() {
+        const e = {
+          originalEvent: {
+            clipboardData: {
+              getData(mimeType) {
+                // When GFM code is copied, we put the regular plain text
+                // on the clipboard as `text/plain`, and the GFM as `text/x-gfm`.
+                // This emulates the behavior of `getData` with that data.
+                if (mimeType === 'text/plain') {
+                  return 'code';
+                }
+                if (mimeType === 'text/x-gfm') {
+                  return '`code`';
+                }
+                return null;
+              },
+            },
+          },
+          preventDefault() {},
+        };
+
+        window.gl.CopyAsGFM.pasteGFM(e);
+      }
+
+      it('wraps pasted code when not already in code tags', () => {
+        spyOn(window.gl.utils, 'insertText').and.callFake((el, textFunc) => {
+          const insertedText = textFunc('This is code: ', '');
+          expect(insertedText).toEqual('`code`');
+        });
+
+        callPasteGFM();
+      });
+
+      it('does not wrap pasted code when already in code tags', () => {
+        spyOn(window.gl.utils, 'insertText').and.callFake((el, textFunc) => {
+          const insertedText = textFunc('This is code: `', '`');
+          expect(insertedText).toEqual('code');
+        });
+
+        callPasteGFM();
+      });
+    });
+  });
+})();