1 files changed, 111 insertions, 0 deletions
diff --git a/op_crates/web/event_test.js b/op_crates/web/event_test.js
new file mode 100644
index 000000000..4f9f94fa9
--- /dev/null
+++ b/op_crates/web/event_test.js
@@ -0,0 +1,111 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+function assert(cond) {
+  if (!cond) {
+    throw Error("assert");
+  }
+}
+
+function eventInitializedWithType() {
+  const type = "click";
+  const event = new Event(type);
+
+  assert(event.isTrusted === false);
+  assert(event.target === null);
+  assert(event.currentTarget === null);
+  assert(event.type === "click");
+  assert(event.bubbles === false);
+  assert(event.cancelable === false);
+}
+
+function eventInitializedWithTypeAndDict() {
+  const init = "submit";
+  const eventInit = { bubbles: true, cancelable: true };
+  const event = new Event(init, eventInit);
+
+  assert(event.isTrusted === false);
+  assert(event.target === null);
+  assert(event.currentTarget === null);
+  assert(event.type === "submit");
+  assert(event.bubbles === true);
+  assert(event.cancelable === true);
+}
+
+function eventComposedPathSuccess() {
+  const type = "click";
+  const event = new Event(type);
+  const composedPath = event.composedPath();
+
+  assert(composedPath.length === 0);
+}
+
+function eventStopPropagationSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assert(event.cancelBubble === false);
+  event.stopPropagation();
+  assert(event.cancelBubble === true);
+}
+
+function eventStopImmediatePropagationSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assert(event.cancelBubble === false);
+  event.stopImmediatePropagation();
+  assert(event.cancelBubble === true);
+}
+
+function eventPreventDefaultSuccess() {
+  const type = "click";
+  const event = new Event(type);
+
+  assert(event.defaultPrevented === false);
+  event.preventDefault();
+  assert(event.defaultPrevented === false);
+
+  const eventInit = { bubbles: true, cancelable: true };
+  const cancelableEvent = new Event(type, eventInit);
+  assert(cancelableEvent.defaultPrevented === false);
+  cancelableEvent.preventDefault();
+  assert(cancelableEvent.defaultPrevented === true);
+}
+
+function eventInitializedWithNonStringType() {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const type = undefined;
+  const event = new Event(type);
+
+  assert(event.isTrusted === false);
+  assert(event.target === null);
+  assert(event.currentTarget === null);
+  assert(event.type === "undefined");
+  assert(event.bubbles === false);
+  assert(event.cancelable === false);
+}
+
+// ref https://github.com/web-platform-tests/wpt/blob/master/dom/events/Event-isTrusted.any.js
+function eventIsTrusted() {
+  const desc1 = Object.getOwnPropertyDescriptor(new Event("x"), "isTrusted");
+  assert(desc1);
+  assert(typeof desc1.get === "function");
+
+  const desc2 = Object.getOwnPropertyDescriptor(new Event("x"), "isTrusted");
+  assert(desc2);
+  assert(typeof desc2.get === "function");
+
+  assert(desc1.get === desc2.get);
+}
+
+function main() {
+  eventInitializedWithType();
+  eventInitializedWithTypeAndDict();
+  eventComposedPathSuccess();
+  eventStopPropagationSuccess();
+  eventStopImmediatePropagationSuccess();
+  eventPreventDefaultSuccess();
+  eventInitializedWithNonStringType();
+  eventIsTrusted();
+}
+
+main();