1 files changed, 26 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_jsterm_eager_evaluation_warnings.js b/devtools/client/webconsole/test/browser/browser_jsterm_eager_evaluation_warnings.js
new file mode 100644
index 0000000000..446024c7b9
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_jsterm_eager_evaluation_warnings.js
@@ -0,0 +1,26 @@
+/* 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/. */
+
+"use strict";
+
+const TEST_URI = `data:text/html;charset=utf-8,<!DOCTYPE html>Test that eager evaluation can't log warnings in the output`;
+add_task(async function () {
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  setInputValue(hud, `document.getElementById("")`);
+  await waitForEagerEvaluationResult(hud, "null");
+
+  info("Wait for a bit so a warning message could be displayed");
+  await wait(2000);
+  is(
+    findWarningMessage(hud, "getElementById"),
+    undefined,
+    "The eager evaluation did not triggered a warning message"
+  );
+
+  info("Sanity check for the warning message when the expression is evaluated");
+  EventUtils.synthesizeKey("KEY_Enter");
+  await waitFor(() => findWarningMessage(hud, "getElementById"));
+  ok(true, "Evaluation of the expression does trigger the warning message");
+});