abort_controller.ts•2.13 kB
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assert } from "chai";
import { wrapInTests } from "./testHelpers";
import { query } from "../_generated/server";
export default query(async () => {
return await wrapInTests({
basicAbortController,
signalCallsOnabort,
signalEventListener,
onlyAbortsOnce,
controllerHasProperToString,
// abortReason,
});
});
function basicAbortController() {
const controller = new AbortController();
assert(controller);
const { signal } = controller;
assert(signal);
assert.strictEqual(signal.aborted, false);
controller.abort();
assert.strictEqual(signal.aborted, true);
}
function signalCallsOnabort() {
const controller = new AbortController();
const { signal } = controller;
let called = false;
signal.onabort = (evt) => {
assert(evt);
assert.strictEqual(evt.type, "abort");
called = true;
};
controller.abort();
assert(called);
}
function signalEventListener() {
const controller = new AbortController();
const { signal } = controller;
let called = false;
signal.addEventListener("abort", function (ev) {
assert(this === signal);
assert.strictEqual(ev.type, "abort");
called = true;
});
controller.abort();
assert(called);
}
function onlyAbortsOnce() {
const controller = new AbortController();
const { signal } = controller;
let called = 0;
signal.addEventListener("abort", () => called++);
signal.onabort = () => {
called++;
};
controller.abort();
assert.strictEqual(called, 2);
// TODO: the AbortController polyfill doesn't have the aborts-once guarantee.
// controller.abort();
// assert.strictEqual(called, 2);
}
function controllerHasProperToString() {
const actual = Object.prototype.toString.call(new AbortController());
assert.strictEqual(actual, "[object AbortController]");
}
// TODO: the AbortSignal polyfill doesn't implement abort().
// function abortReason() {
// const signal = AbortSignal.abort("hey!");
// assert.strictEqual(signal.aborted, true);
// assert.strictEqual(signal.reason, "hey!");
// }