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// Copyright 2018 the Deno authors. All rights reserved. MIT license.
import { test, assertEqual } from "./test_util.ts";
function deferred() {
let resolve;
let reject;
const promise = new Promise((res, rej) => {
resolve = res;
reject = rej;
});
return {
promise,
resolve,
reject
};
}
function waitForMs(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
test(async function timeoutSuccess() {
const { promise, resolve } = deferred();
let count = 0;
setTimeout(() => {
count++;
resolve();
}, 500);
await promise;
// count should increment
assertEqual(count, 1);
});
test(async function timeoutArgs() {
const { promise, resolve } = deferred();
const arg = 1;
setTimeout(
(a, b, c) => {
assertEqual(a, arg);
assertEqual(b, arg.toString());
assertEqual(c, [arg]);
resolve();
},
10,
arg,
arg.toString(),
[arg]
);
await promise;
});
test(async function timeoutCancelSuccess() {
let count = 0;
const id = setTimeout(() => {
count++;
}, 500);
// Cancelled, count should not increment
clearTimeout(id);
// Wait a bit longer than 500ms
await waitForMs(600);
assertEqual(count, 0);
});
test(async function timeoutCancelMultiple() {
// Set timers and cancel them in the same order.
const t1 = setTimeout(uncalled, 10);
const t2 = setTimeout(uncalled, 10);
const t3 = setTimeout(uncalled, 10);
clearTimeout(t1);
clearTimeout(t2);
clearTimeout(t3);
// Set timers and cancel them in reverse order.
const t4 = setTimeout(uncalled, 20);
const t5 = setTimeout(uncalled, 20);
const t6 = setTimeout(uncalled, 20);
clearTimeout(t6);
clearTimeout(t5);
clearTimeout(t4);
// Sleep until we're certain that the cancelled timers aren't gonna fire.
await waitForMs(50);
function uncalled() {
throw new Error("This function should not be called.");
}
});
test(async function timeoutCancelInvalidSilentFail() {
// Expect no panic
const { promise, resolve } = deferred();
let count = 0;
const id = setTimeout(() => {
count++;
// Should have no effect
clearTimeout(id);
resolve();
}, 500);
await promise;
assertEqual(count, 1);
// Should silently fail (no panic)
clearTimeout(2147483647);
});
test(async function intervalSuccess() {
const { promise, resolve } = deferred();
let count = 0;
const id = setInterval(() => {
count++;
if (count === 2) {
// TODO: clearInterval(id) here alone seems not working
// causing unit_tests.ts to block forever
// Requires further investigation...
clearInterval(id);
resolve();
}
}, 200);
await promise;
// Clear interval
clearInterval(id);
// count should increment twice
assertEqual(count, 2);
});
test(async function intervalCancelSuccess() {
let count = 0;
const id = setInterval(() => {
count++;
}, 500);
// Cancelled, count should not increment
clearInterval(id);
// Wait a bit longer than 500ms
await waitForMs(600);
assertEqual(count, 0);
});
test(async function intervalOrdering() {
const timers = [];
let timeouts = 0;
for (let i = 0; i < 10; i++) {
timers[i] = setTimeout(onTimeout, 20);
}
function onTimeout() {
++timeouts;
for (let i = 1; i < timers.length; i++) {
clearTimeout(timers[i]);
}
}
await waitForMs(100);
assertEqual(timeouts, 1);
});
test(async function intervalCancelInvalidSilentFail() {
// Should silently fail (no panic)
clearInterval(2147483647);
});
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