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-rw-r--r--testing/web-platform/tests/screen-orientation/onchange-event.html80
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diff --git a/testing/web-platform/tests/screen-orientation/onchange-event.html b/testing/web-platform/tests/screen-orientation/onchange-event.html
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+++ b/testing/web-platform/tests/screen-orientation/onchange-event.html
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+<!DOCTYPE html>
+<html>
+<body>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+
+var changeTest = async_test("Test that orientationchange event is fired when the orientation changes.");
+var noChangeTest = async_test("Test that orientationchange event is not fired when the orientation does not change.");
+
+var orientations = [
+ 'portrait-primary',
+ 'portrait-secondary',
+ 'landscape-primary',
+ 'landscape-secondary'
+];
+
+var currentIndex = orientations.indexOf(window.screen.orientation.type);
+// Count the number of calls received from the EventHandler set on screen.orientation.onchange.
+var orientationChangeEventHandlerCalls = 0;
+// Count the number of calls received from the listener set with screen.orientation.addEventListene().
+var orientationChangeEventListenerCalls = 0;
+
+var orientationChangeContinuation = null;
+
+function getNextIndex() {
+ return (currentIndex + 1) % orientations.length;
+}
+
+window.screen.orientation.onchange = function() {
+ orientationChangeEventHandlerCalls++;
+ if (orientationChangeEventContinuation) {
+ setTimeout(orientationChangeEventContinuation);
+ orientationChangeEventContinuation = null;
+ }
+};
+
+window.screen.orientation.addEventListener('change', function() {
+ orientationChangeEventListenerCalls++;
+});
+
+function runNoChangeTest() {
+ screen.orientation.lock(orientations[currentIndex]).then(function() {}, function() {});
+
+ noChangeTest.step(function() {
+ assert_equals(screen.orientation.type, orientations[currentIndex]);
+ assert_equals(orientationChangeEventHandlerCalls, orientations.length);
+ assert_equals(orientationChangeEventListenerCalls, orientations.length);
+ });
+
+ noChangeTest.done();
+}
+
+var i = 0;
+function runChangeTest() {
+ screen.orientation.lock(orientations[getNextIndex()]).then(function() {}, function() {});
+ currentIndex = getNextIndex();
+
+ orientationChangeEventContinuation = function() {
+ changeTest.step(function() {
+ assert_equals(screen.orientation.type, orientations[currentIndex]);
+ assert_equals(orientationChangeEventHandlerCalls, i + 1);
+ assert_equals(orientationChangeEventListenerCalls, i + 1);
+ });
+
+ ++i;
+ if (i == orientations.length) {
+ changeTest.done();
+ runNoChangeTest();
+ } else {
+ runChangeTest();
+ }
+ };
+}
+
+runChangeTest();
+
+</script>
+</body>
+</html>