1<!DOCTYPE html>
2<title>window.event tests</title>
3<link rel="author" title="Mike Taylor" href="mailto:miketaylr@gmail.com">
4<script src="/resources/testharness.js"></script>
5<script src="/resources/testharnessreport.js"></script>
6<div id=log></div>
7<script>
8setup({allow_uncaught_exception: true});
9
10test(t => {
11  assert_own_property(window, "event");
12  assert_equals(window.event, undefined);
13}, "event exists on window, which is initially set to undefined");
14
15async_test(t => {
16  let target = document.createElement("div");
17  assert_equals(window.event, undefined, "undefined before dispatch");
18
19  let clickEvent = new Event("click");
20  target.addEventListener("click", t.step_func_done(e => {
21    assert_equals(window.event, clickEvent, "window.event set to current event during dispatch");
22  }));
23
24  target.dispatchEvent(clickEvent);
25  assert_equals(window.event, undefined, "undefined after dispatch");
26}, "window.event is only defined during dispatch");
27
28async_test(t => {
29  let parent = document.createElement("div");
30  let root = parent.attachShadow({mode: "closed"});
31  let span = document.createElement("span");
32  root.appendChild(span);
33
34  span.addEventListener("test", t.step_func(e => {
35    assert_equals(window.event, undefined);
36    assert_not_equals(window.event, e);
37  }));
38
39  parent.addEventListener("test", t.step_func_done(e => {
40    assert_equals(window.event, e);
41    assert_not_equals(window.event, undefined);
42  }));
43
44  parent.dispatchEvent(new Event("test", {composed: true}));
45}, "window.event is undefined if the target is in a shadow tree (event dispatched outside shadow tree)");
46
47async_test(t => {
48  let parent = document.createElement("div");
49  let root = parent.attachShadow({mode: "closed"});
50  let span = document.createElement("span");
51  root.appendChild(span);
52  let shadowNode = root.firstElementChild;
53
54  shadowNode.addEventListener("test", t.step_func((e) => {
55    assert_not_equals(window.event, e);
56    assert_equals(window.event, undefined);
57  }));
58
59  parent.addEventListener("test", t.step_func_done(e => {
60    assert_equals(window.event, e);
61    assert_not_equals(window.event, undefined);
62  }));
63
64  shadowNode.dispatchEvent(new Event("test", {composed: true, bubbles: true}));
65}, "window.event is undefined if the target is in a shadow tree (event dispatched inside shadow tree)");
66
67async_test(t => {
68  let parent = document.createElement("div");
69  let root = parent.attachShadow({mode: "open"});
70  document.body.append(parent)
71  let span = document.createElement("span");
72  root.append(span);
73  let shadowNode = root.firstElementChild;
74
75  shadowNode.addEventListener("error", t.step_func(e => {
76    assert_not_equals(window.event, e);
77    assert_equals(window.event, undefined);
78  }));
79
80  let windowOnErrorCalled = false;
81  window.onerror = t.step_func_done(() => {
82    windowOnErrorCalled = true;
83    assert_equals(typeof window.event, "object");
84    assert_equals(window.event.type, "error");
85  });
86
87  shadowNode.dispatchEvent(new ErrorEvent("error", {composed: true, bubbles: true}));
88  assert_true(windowOnErrorCalled);
89}, "window.event is undefined inside window.onerror if the target is in a shadow tree (ErrorEvent dispatched inside shadow tree)");
90
91async_test(t => {
92  let target1 = document.createElement("div");
93  let target2 = document.createElement("div");
94
95  target2.addEventListener("dude", t.step_func(() => {
96    assert_equals(window.event.type, "dude");
97  }));
98
99  target1.addEventListener("cool", t.step_func_done(() => {
100    assert_equals(window.event.type, "cool", "got expected event from global event during dispatch");
101    target2.dispatchEvent(new Event("dude"));
102    assert_equals(window.event.type, "cool", "got expected event from global event after handling a different event handler callback");
103  }));
104
105  target1.dispatchEvent(new Event("cool"));
106}, "window.event is set to the current event during dispatch");
107
108async_test(t => {
109  let target = document.createElement("div");
110
111  target.addEventListener("click", t.step_func_done(e => {
112    assert_equals(e, window.event);
113  }));
114
115  target.dispatchEvent(new Event("click"));
116}, "window.event is set to the current event, which is the event passed to dispatch");
117</script>
118