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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
function assert(cond) {
if (!cond) {
throw Error("assert");
}
}
function assertEquals(left, right) {
assert(left === right);
}
function assertThrows(fn) {
let error = null;
try {
fn();
} catch (error_) {
error = error_;
}
if (error == null) {
throw new Error("Didn't throw.");
}
return error;
}
function basicAbortController() {
const controller = new AbortController();
assert(controller);
const { signal } = controller;
assert(signal);
assertEquals(signal.aborted, false);
controller.abort();
assertEquals(signal.aborted, true);
}
function signalCallsOnabort() {
const controller = new AbortController();
const { signal } = controller;
let called = false;
signal.onabort = (evt) => {
assert(evt);
assertEquals(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);
assertEquals(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();
assertEquals(called, 2);
controller.abort();
assertEquals(called, 2);
}
function controllerHasProperToString() {
const actual = Object.prototype.toString.call(new AbortController());
assertEquals(actual, "[object AbortController]");
}
function abortSignalIllegalConstructor() {
const error = assertThrows(() => new AbortSignal());
assert(error instanceof TypeError);
assertEquals(error.message, "Illegal constructor.");
}
function abortSignalEventOrder() {
const arr = [];
const controller = new AbortController();
const { signal } = controller;
signal.addEventListener("abort", () => arr.push(1));
signal.onabort = () => arr.push(2);
signal.addEventListener("abort", () => arr.push(3));
controller.abort();
assertEquals(arr[0], 1);
assertEquals(arr[1], 2);
assertEquals(arr[2], 3);
}
function abortSignalEventOrderComplex() {
const arr = [];
const controller = new AbortController();
const { signal } = controller;
signal.addEventListener("abort", () => arr.push(1));
signal.onabort = () => {
throw new Error();
};
signal.addEventListener("abort", () => arr.push(3));
signal.onabort = () => arr.push(2);
controller.abort();
assertEquals(arr[0], 1);
assertEquals(arr[1], 2);
assertEquals(arr[2], 3);
}
function abortSignalHandlerLocation() {
const controller = new AbortController();
const { signal } = controller;
const abortHandler = Object.getOwnPropertyDescriptor(signal, "onabort");
assertEquals(abortHandler, undefined);
}
function main() {
basicAbortController();
signalCallsOnabort();
signalEventListener();
onlyAbortsOnce();
controllerHasProperToString();
abortSignalIllegalConstructor();
abortSignalEventOrder();
abortSignalEventOrderComplex();
abortSignalHandlerLocation();
}
main();
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