1 files changed, 53 insertions, 0 deletions
diff --git a/browser/devtools/webconsole/test/browser_longstring_hang.js b/browser/devtools/webconsole/test/browser_longstring_hang.js
new file mode 100644
index 000000000..5d8dc04cc
--- /dev/null
+++ b/browser/devtools/webconsole/test/browser_longstring_hang.js
@@ -0,0 +1,53 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that very long strings do not hang the browser.
+
+const TEST_URI = "http://example.com/browser/browser/devtools/webconsole/test/test-bug-859170-longstring-hang.html";
+
+let test = asyncTest(function* () {
+  yield loadTab(TEST_URI);
+
+  let hud = yield openConsole();
+
+  info("wait for the initial long string");
+
+  let results = yield waitForMessages({
+    webconsole: hud,
+    messages: [
+      {
+        name: "find 'foobar', no 'foobaz', in long string output",
+        text: "foobar",
+        noText: "foobaz",
+        category: CATEGORY_WEBDEV,
+        longString: true,
+      },
+    ],
+  });
+
+  let clickable = results[0].longStrings[0];
+  ok(clickable, "long string ellipsis is shown");
+  clickable.scrollIntoView(false);
+
+  EventUtils.synthesizeMouse(clickable, 2, 2, {}, hud.iframeWindow);
+
+  info("wait for long string expansion");
+
+  yield waitForMessages({
+    webconsole: hud,
+    messages: [
+      {
+        name: "find 'foobaz' after expand, but no 'boom!' at the end",
+        text: "foobaz",
+        noText: "boom!",
+        category: CATEGORY_WEBDEV,
+        longString: false,
+      },
+      {
+        text: "too long to be displayed",
+        longString: false,
+      },
+    ],
+  });
+});