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<!DOCTYPE html>
<html>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(function() {
assert_true('orientation' in window.screen);
assert_true('angle' in window.screen.orientation);
assert_true('type' in window.screen.orientation);
assert_true('lock' in window.screen.orientation);
assert_true('unlock' in window.screen.orientation);
assert_true('onchange' in window.screen.orientation);
}, "Test that the Screen Orientation API is present.")
test(function() {
assert_equals(typeof(screen.orientation), "object");
assert_equals(typeof(screen.orientation.angle), "number");
assert_equals(typeof(screen.orientation.type), "string");
assert_equals(typeof(screen.orientation.lock), "function");
assert_equals(typeof(screen.orientation.unlock), "function");
assert_equals(typeof(screen.orientation.onchange), "object");
}, "Test Screen Orientation API property types.");
test(function() {
assert_true('addEventListener' in screen.orientation);
assert_true('removeEventListener' in screen.orientation);
assert_true('dispatchEvent' in screen.orientation);
assert_true(screen.orientation instanceof EventTarget)
}, "Test that screen.orientation is an EventTarget.");
</script>
</body>
</html>
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