diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_break-on-dom-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_break-on-dom-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,126 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that event listeners are fetched when the events tab is selected
+ * or while sources are fetched and the events tab is focused.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_event-listeners-02.html";
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    let gDebugger = aPanel.panelWin;
+    let gView = gDebugger.DebuggerView;
+    let gEvents = gView.EventListeners;
+
+    Task.spawn(function() {
+      yield waitForSourceShown(aPanel, ".html");
+      yield testFetchOnFocus();
+      yield testFetchOnReloadWhenFocused();
+      yield testFetchOnReloadWhenNotFocused();
+      yield closeDebuggerAndFinish(aPanel);
+    });
+
+    function testFetchOnFocus() {
+      return Task.spawn(function() {
+        let fetched = waitForDebuggerEvents(aPanel, gDebugger.EVENTS.EVENT_LISTENERS_FETCHED);
+
+        gView.toggleInstrumentsPane({ visible: true, animated: false }, 1);
+        is(gView.instrumentsPaneHidden, false,
+          "The instruments pane should be visible now.");
+        is(gView.instrumentsPaneTab, "events-tab",
+          "The events tab should be selected.");
+
+        yield fetched;
+
+        ok(true,
+          "Event listeners were fetched when the events tab was selected");
+        is(gEvents.itemCount, 4,
+          "There should be 4 events displayed in the view.");
+      });
+    }
+
+    function testFetchOnReloadWhenFocused() {
+      return Task.spawn(function() {
+        let fetched = waitForDebuggerEvents(aPanel, gDebugger.EVENTS.EVENT_LISTENERS_FETCHED);
+
+        let reloading = once(gDebugger.gTarget, "will-navigate");
+        let reloaded = waitForSourcesAfterReload();
+        gDebugger.DebuggerController._target.activeTab.reload();
+
+        yield reloading;
+
+        is(gEvents.itemCount, 0,
+          "There should be no events displayed in the view while reloading.");
+        ok(true,
+          "Event listeners were removed when the target started navigating.");
+
+        yield reloaded;
+
+        is(gView.instrumentsPaneHidden, false,
+          "The instruments pane should still be visible.");
+        is(gView.instrumentsPaneTab, "events-tab",
+          "The events tab should still be selected.");
+
+        yield fetched;
+
+        is(gEvents.itemCount, 4,
+          "There should be 4 events displayed in the view after reloading.");
+        ok(true,
+          "Event listeners were added back after the target finished navigating.");
+      });
+    }
+
+    function testFetchOnReloadWhenNotFocused() {
+      return Task.spawn(function() {
+        gDebugger.on(gDebugger.EVENTS.EVENT_LISTENERS_FETCHED, () => {
+          ok(false, "Shouldn't have fetched any event listeners.");
+        });
+        gDebugger.on(gDebugger.EVENTS.EVENT_BREAKPOINTS_UPDATED, () => {
+          ok(false, "Shouldn't have updated any event breakpoints.");
+        });
+
+        gView.toggleInstrumentsPane({ visible: true, animated: false }, 0);
+        is(gView.instrumentsPaneHidden, false,
+          "The instruments pane should still be visible.");
+        is(gView.instrumentsPaneTab, "variables-tab",
+          "The variables tab should be selected.");
+
+        let reloading = once(gDebugger.gTarget, "will-navigate");
+        let reloaded = waitForSourcesAfterReload();
+        gDebugger.DebuggerController._target.activeTab.reload();
+
+        yield reloading;
+
+        is(gEvents.itemCount, 0,
+          "There should be no events displayed in the view while reloading.");
+        ok(true,
+          "Event listeners were removed when the target started navigating.");
+
+        yield reloaded;
+
+        is(gView.instrumentsPaneHidden, false,
+          "The instruments pane should still be visible.");
+        is(gView.instrumentsPaneTab, "variables-tab",
+          "The variables tab should still be selected.");
+
+        // Just to be really sure that the events will never ever fire.
+        yield waitForTime(1000);
+
+        is(gEvents.itemCount, 0,
+          "There should be no events displayed in the view after reloading.");
+        ok(true,
+          "Event listeners were not added after the target finished navigating.");
+      });
+    }
+
+    function waitForSourcesAfterReload() {
+      return promise.all([
+        waitForDebuggerEvents(aPanel, gDebugger.EVENTS.NEW_SOURCE),
+        waitForDebuggerEvents(aPanel, gDebugger.EVENTS.SOURCES_ADDED),
+        waitForDebuggerEvents(aPanel, gDebugger.EVENTS.SOURCE_SHOWN)
+      ]);
+    }
+  });
+}