39 lines
1.4 KiB
JavaScript
39 lines
1.4 KiB
JavaScript
// META: global=window,worker
|
|
"use strict";
|
|
|
|
test(() => {
|
|
assert_equals(typeof queueMicrotask, "function");
|
|
}, "It exists and is a function");
|
|
|
|
test(() => {
|
|
assert_throws_js(TypeError, () => queueMicrotask(), "no argument");
|
|
assert_throws_js(TypeError, () => queueMicrotask(undefined), "undefined");
|
|
assert_throws_js(TypeError, () => queueMicrotask(null), "null");
|
|
assert_throws_js(TypeError, () => queueMicrotask(0), "0");
|
|
assert_throws_js(TypeError, () => queueMicrotask({ handleEvent() { } }), "an event handler object");
|
|
assert_throws_js(TypeError, () => queueMicrotask("window.x = 5;"), "a string");
|
|
}, "It throws when given non-functions");
|
|
|
|
async_test(t => {
|
|
let called = false;
|
|
queueMicrotask(t.step_func_done(() => {
|
|
called = true;
|
|
}));
|
|
assert_false(called);
|
|
}, "It calls the callback asynchronously");
|
|
|
|
async_test(t => {
|
|
queueMicrotask(t.step_func_done(function () { // note: intentionally not an arrow function
|
|
assert_array_equals(arguments, []);
|
|
}), "x", "y");
|
|
}, "It does not pass any arguments");
|
|
|
|
async_test(t => {
|
|
const happenings = [];
|
|
Promise.resolve().then(() => happenings.push("a"));
|
|
queueMicrotask(() => happenings.push("b"));
|
|
Promise.reject().catch(() => happenings.push("c"));
|
|
queueMicrotask(t.step_func_done(() => {
|
|
assert_array_equals(happenings, ["a", "b", "c"]);
|
|
}));
|
|
}, "It interleaves with promises as expected");
|