1 files changed, 92 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_multiple_windows_and_tabs.js b/devtools/client/webconsole/test/browser/browser_webconsole_multiple_windows_and_tabs.js
new file mode 100644
index 0000000000..d2a9b3d32e
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_multiple_windows_and_tabs.js
@@ -0,0 +1,92 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that the Web Console doesn't leak when multiple tabs and windows are
+// opened and then closed. See Bug 595350.
+
+"use strict";
+
+const TEST_URI =
+  "data:text/html;charset=utf-8,<!DOCTYPE html>Web Console test for bug 595350";
+
+add_task(async function () {
+  requestLongerTimeout(3);
+  // Bug 1518138: GC heuristics are broken for this test, so that the test
+  // ends up running out of memory. Try to work-around the problem by GCing
+  // before the test begins.
+  Cu.forceShrinkingGC();
+
+  const win1 = window;
+
+  info("Add test tabs in first window");
+  const tab1 = await addTab(TEST_URI, { window: win1 });
+  const tab2 = await addTab(TEST_URI, { window: win1 });
+  info("Test tabs added in first window");
+
+  info("Open a second window");
+  const windowOpenedPromise = BrowserTestUtils.waitForNewWindow();
+  const win2 = OpenBrowserWindow();
+  await windowOpenedPromise;
+
+  info("Add test tabs in second window");
+  const tab3 = await addTab(TEST_URI, { window: win2 });
+  const tab4 = await addTab(TEST_URI, { window: win2 });
+
+  info("Opening console in each test tab");
+  const tabs = [tab1, tab2, tab3, tab4];
+  for (const tab of tabs) {
+    // Open the console in tab${i}.
+    const hud = await openConsole(tab);
+    const browser = hud.commands.descriptorFront.localTab.linkedBrowser;
+    const message = "message for tab " + tabs.indexOf(tab);
+
+    // Log a message in the newly opened console.
+    const onMessage = waitForMessageByType(hud, message, ".console-api");
+    await SpecialPowers.spawn(browser, [message], function (msg) {
+      content.console.log(msg);
+    });
+    await onMessage;
+
+    await hud.toolbox.sourceMapURLService.waitForSourcesLoading();
+  }
+
+  const onConsolesDestroyed = waitForNEvents("web-console-destroyed", 4);
+
+  info("Close the second window");
+  win2.close();
+
+  info("Close the test tabs in the first window");
+  win1.gBrowser.removeTab(tab1);
+  win1.gBrowser.removeTab(tab2);
+
+  info("Wait for 4 web-console-destroyed events");
+  await onConsolesDestroyed;
+
+  ok(true, "Received web-console-destroyed for each console opened");
+});
+
+/**
+ * Wait for N events helper customized to work with Services.obs.add/removeObserver.
+ */
+function waitForNEvents(expectedTopic, times) {
+  return new Promise(resolve => {
+    let count = 0;
+
+    function onEvent(subject, topic) {
+      if (topic !== expectedTopic) {
+        return;
+      }
+
+      count++;
+      info(`Received ${expectedTopic} ${count} time(s).`);
+      if (count == times) {
+        resolve();
+      }
+    }
+
+    registerCleanupFunction(() => {
+      Services.obs.removeObserver(onEvent, expectedTopic);
+    });
+    Services.obs.addObserver(onEvent, expectedTopic);
+  });
+}