Add Event web API (#1059)

1 files changed, 70 insertions, 0 deletions

diff --git a/js/event_test.ts b/js/event_test.ts
new file mode 100644
index 000000000..3a1254956
--- /dev/null
+++ b/js/event_test.ts
@@ -0,0 +1,70 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import { test, assertEqual } from "./test_util.ts";
+
+test(function eventInitializedWithType() {
+  const type = "click";
+  const event = new Event(type);
+
+  assertEqual(event.isTrusted, false);
+  assertEqual(event.target, null);
+  assertEqual(event.currentTarget, null);
+  assertEqual(event.type, "click");
+  assertEqual(event.bubbles, false);
+  assertEqual(event.cancelable, false);
+});
+
+test(function eventInitializedWithTypeAndDict() {
+  const init = "submit";
+  const eventInitDict = new EventInit({ bubbles: true, cancelable: true });
+  const event = new Event(init, eventInitDict);
+
+  assertEqual(event.isTrusted, false);
+  assertEqual(event.target, null);
+  assertEqual(event.currentTarget, null);
+  assertEqual(event.type, "submit");
+  assertEqual(event.bubbles, true);
+  assertEqual(event.cancelable, true);
+});
+
+test(function eventComposedPathSuccess() {
+  const type = "click";
+  const event = new Event(type);
+  const composedPath = event.composedPath();
+
+  assertEqual(composedPath, []);
+});
+
+test(function eventStopPropagationSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assertEqual(event.cancelBubble, false);
+  event.stopPropagation();
+  assertEqual(event.cancelBubble, true);
+});
+
+test(function eventStopImmediatePropagationSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assertEqual(event.cancelBubble, false);
+  assertEqual(event.cancelBubbleImmediately, false);
+  event.stopImmediatePropagation();
+  assertEqual(event.cancelBubble, true);
+  assertEqual(event.cancelBubbleImmediately, true);
+});
+
+test(function eventPreventDefaultSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assertEqual(event.defaultPrevented, false);
+  event.preventDefault();
+  assertEqual(event.defaultPrevented, false);
+
+  const eventInitDict = new EventInit({ bubbles: true, cancelable: true });
+  const cancelableEvent = new Event(type, eventInitDict);
+  assertEqual(cancelableEvent.defaultPrevented, false);
+  cancelableEvent.preventDefault();
+  assertEqual(cancelableEvent.defaultPrevented, true);
+});