40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
|
import { assert, assertArrayEquals, assertThrows } from "./assert.js";
|
||
|
|
|
||
|
|
function test_types() {
|
||
|
|
assertThrows(TypeError, () => queueMicrotask(), "no argument");
|
||
|
|
assertThrows(TypeError, () => queueMicrotask(undefined), "undefined");
|
||
|
|
assertThrows(TypeError, () => queueMicrotask(null), "null");
|
||
|
|
assertThrows(TypeError, () => queueMicrotask(0), "0");
|
||
|
|
assertThrows(TypeError, () => queueMicrotask({ handleEvent() { } }), "an event handler object");
|
||
|
|
assertThrows(TypeError, () => queueMicrotask("window.x = 5;"), "a string");
|
||
|
|
}
|
||
|
|
|
||
|
|
function test_async() {
|
||
|
|
let called = false;
|
||
|
|
queueMicrotask(() => {
|
||
|
|
called = true;
|
||
|
|
});
|
||
|
|
assert(!called);
|
||
|
|
}
|
||
|
|
|
||
|
|
function test_arguments() {
|
||
|
|
queueMicrotask(function () { // note: intentionally not an arrow function
|
||
|
|
assert(arguments.length === 0);
|
||
|
|
}, "x", "y");
|
||
|
|
};
|
||
|
|
|
||
|
|
function test_async_order() {
|
||
|
|
const happenings = [];
|
||
|
|
Promise.resolve().then(() => happenings.push("a"));
|
||
|
|
queueMicrotask(() => happenings.push("b"));
|
||
|
|
Promise.reject().catch(() => happenings.push("c"));
|
||
|
|
queueMicrotask(() => {
|
||
|
|
assertArrayEquals(happenings, ["a", "b", "c"]);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
test_types();
|
||
|
|
test_async();
|
||
|
|
test_arguments();
|
||
|
|
test_async_order();
|