1 files changed, 48 insertions, 0 deletions
diff --git a/LayoutTests/fast/dom/DeviceOrientation/script-tests/add-listener-from-callback.js b/LayoutTests/fast/dom/DeviceOrientation/script-tests/add-listener-from-callback.js
new file mode 100644
index 0000000..381b89c
--- /dev/null
+++ b/LayoutTests/fast/dom/DeviceOrientation/script-tests/add-listener-from-callback.js
@@ -0,0 +1,48 @@
+description('Tests that adding a new event listener from a callback works as expected.');
+
+var mockEvent;
+function setMockOrientation(alpha, beta, gamma) {
+    mockEvent = {alpha: alpha, beta: beta, gamma: gamma};
+    if (window.layoutTestController)
+        layoutTestController.setMockDeviceOrientation(true, mockEvent.alpha, true, mockEvent.beta, true, mockEvent.gamma);
+    else
+        debug('This test can not be run without the LayoutTestController');
+}
+
+var deviceOrientationEvent;
+function checkOrientation(event) {
+    deviceOrientationEvent = event;
+    shouldBe('deviceOrientationEvent.alpha', 'mockEvent.alpha');
+    shouldBe('deviceOrientationEvent.beta', 'mockEvent.beta');
+    shouldBe('deviceOrientationEvent.gamma', 'mockEvent.gamma');
+}
+
+var firstListenerEvents = 0;
+function firstListener(event) {
+    checkOrientation(event);
+    if (++firstListenerEvents == 1)
+        setMockOrientation(11.1, 22.2, 33.3);
+    else if (firstListenerEvents > 2)
+        testFailed('Too many events for first listener.');
+    window.addEventListener('deviceorientation', secondListener);
+    maybeFinishTest();
+}
+
+var secondListenerEvents = 0;
+function secondListener(event) {
+    checkOrientation(event);
+    if (++secondListenerEvents > 1)
+        testFailed('Too many events for second listener.');
+    maybeFinishTest();
+}
+
+function maybeFinishTest() {
+    if (firstListenerEvents == 2 && secondListenerEvents == 1)
+        finishJSTest();
+}
+
+setMockOrientation(1.1, 2.2, 3.3);
+window.addEventListener('deviceorientation', firstListener);
+
+window.jsTestIsAsync = true;
+window.successfullyParsed = true;