1 files changed, 34 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_duplicate_errors.js b/devtools/client/webconsole/test/browser/browser_webconsole_duplicate_errors.js
new file mode 100644
index 0000000000..4c467784b8
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_duplicate_errors.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that exceptions thrown by content don't show up twice in the Web
+// Console. See Bug 582201.
+
+"use strict";
+
+const TEST_URI =
+  "http://example.com/browser/devtools/client/webconsole/" +
+  "test/browser/test-duplicate-error.html";
+
+add_task(async function () {
+  // On e10s, the exception is triggered in child process
+  // and is ignored by test harness
+  if (!Services.appinfo.browserTabsRemoteAutostart) {
+    expectUncaughtException();
+  }
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  await waitFor(() => findErrorMessage(hud, "fooDuplicateError1"));
+
+  const errorMessages = hud.ui.outputNode.querySelectorAll(".message.error");
+  is(
+    errorMessages.length,
+    1,
+    "There's only one error message for fooDuplicateError1"
+  );
+  is(
+    errorMessages[0].querySelector(".message-repeats"),
+    null,
+    "There is no repeat bubble on the error message"
+  );
+});