1 files changed, 45 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/utils/tests/clipboard.spec.js b/devtools/client/debugger/src/utils/tests/clipboard.spec.js
new file mode 100644
index 0000000000..dcba730149
--- /dev/null
+++ b/devtools/client/debugger/src/utils/tests/clipboard.spec.js
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+import { copyToTheClipboard } from "../clipboard";
+
+let clipboardTestCopyString, expectedCopyEvent;
+const addEventListener = jest.fn();
+const execCommand = jest.fn();
+const removeEventListener = jest.fn();
+
+describe("copyToTheClipboard()", () => {
+  beforeEach(() => {
+    expectedCopyEvent = "copy";
+    clipboardTestCopyString = "content intended for clipboard";
+
+    global.document.addEventListener = addEventListener;
+    global.document.execCommand = execCommand;
+    global.document.removeEventListener = removeEventListener;
+  });
+
+  it("listens for 'copy' event", () => {
+    copyToTheClipboard(clipboardTestCopyString);
+
+    expect(document.addEventListener).toHaveBeenCalledWith(
+      expectedCopyEvent,
+      expect.anything()
+    );
+  });
+
+  it("calls document.execCommand() with 'copy' command", () => {
+    copyToTheClipboard(clipboardTestCopyString);
+
+    expect(execCommand).toHaveBeenCalledWith(expectedCopyEvent, false, null);
+  });
+
+  it("removes event listener for 'copy' event", () => {
+    copyToTheClipboard(clipboardTestCopyString);
+
+    expect(document.removeEventListener).toHaveBeenCalledWith(
+      expectedCopyEvent,
+      expect.anything()
+    );
+  });
+});