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// 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() {
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 eventIsTrustedGetterName() {
const { get } = Object.getOwnPropertyDescriptor(new Event("x"), "isTrusted");
assert(get.name === "get isTrusted");
try {
Reflect.construct(get);
throw new Error("Should not have reached here");
} catch (e) {
assert(e.message.includes("not a constructor"));
}
}
function eventAbortSignal() {
let count = 0;
function handler() {
count++;
}
const et = new EventTarget();
const controller = new AbortController();
et.addEventListener("test", handler, { signal: controller.signal });
et.dispatchEvent(new Event("test"));
assert(count === 1);
et.dispatchEvent(new Event("test"));
assert(count === 2);
controller.abort();
et.dispatchEvent(new Event("test"));
assert(count === 2);
et.addEventListener("test", handler, { signal: controller.signal });
et.dispatchEvent(new Event("test"));
assert(count === 2);
}
function main() {
eventInitializedWithType();
eventInitializedWithTypeAndDict();
eventComposedPathSuccess();
eventStopPropagationSuccess();
eventStopImmediatePropagationSuccess();
eventPreventDefaultSuccess();
eventInitializedWithNonStringType();
eventIsTrusted();
eventIsTrustedGetterName();
eventAbortSignal();
}
main();
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