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globals_test.ts
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globals_test.ts
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// deno-lint-ignore-file no-window-prefix
import { assert, assertEquals, assertRejects } from "./test_util.ts";
Deno.test(function globalThisExists() {
assert(globalThis != null);
});
Deno.test(function noInternalGlobals() {
// globalThis.__bootstrap should not be there.
for (const key of Object.keys(globalThis)) {
assert(!key.startsWith("_"));
}
});
Deno.test(function windowExists() {
assert(window != null);
});
Deno.test(function selfExists() {
assert(self != null);
});
Deno.test(function windowWindowExists() {
assert(window.window === window);
});
Deno.test(function windowSelfExists() {
assert(window.self === window);
});
Deno.test(function globalThisEqualsWindow() {
assert(globalThis === window);
});
Deno.test(function globalThisEqualsSelf() {
assert(globalThis === self);
});
Deno.test(function globalThisInstanceofWindow() {
assert(globalThis instanceof Window);
});
Deno.test(function globalThisConstructorLength() {
assert(globalThis.constructor.length === 0);
});
Deno.test(function globalThisInstanceofEventTarget() {
assert(globalThis instanceof EventTarget);
});
Deno.test(function navigatorInstanceofNavigator() {
// TODO(nayeemrmn): Add `Navigator` to deno_lint globals.
// deno-lint-ignore no-undef
assert(navigator instanceof Navigator);
});
Deno.test(function DenoNamespaceExists() {
assert(Deno != null);
});
Deno.test(function DenoNamespaceEqualsWindowDeno() {
assert(Deno === window.Deno);
});
Deno.test(function DenoNamespaceIsNotFrozen() {
assert(!Object.isFrozen(Deno));
});
Deno.test(function webAssemblyExists() {
assert(typeof WebAssembly.compile === "function");
});
// @ts-ignore This is not publicly typed namespace, but it's there for sure.
const core = Deno[Deno.internal].core;
Deno.test(function DenoNamespaceConfigurable() {
const desc = Object.getOwnPropertyDescriptor(globalThis, "Deno");
assert(desc);
assert(desc.configurable);
assert(!desc.writable);
});
Deno.test(function DenoCoreNamespaceIsImmutable() {
const { print } = core;
try {
core.print = 1;
} catch {
// pass
}
assert(print === core.print);
try {
delete core.print;
} catch {
// pass
}
assert(print === core.print);
});
Deno.test(async function windowQueueMicrotask() {
let resolve1: () => void | undefined;
let resolve2: () => void | undefined;
let microtaskDone = false;
const p1 = new Promise<void>((res) => {
resolve1 = () => {
microtaskDone = true;
res();
};
});
const p2 = new Promise<void>((res) => {
resolve2 = () => {
assert(microtaskDone);
res();
};
});
window.queueMicrotask(resolve1!);
setTimeout(resolve2!, 0);
await p1;
await p2;
});
Deno.test(function webApiGlobalThis() {
assert(globalThis.FormData !== null);
assert(globalThis.TextEncoder !== null);
assert(globalThis.TextEncoderStream !== null);
assert(globalThis.TextDecoder !== null);
assert(globalThis.TextDecoderStream !== null);
assert(globalThis.CountQueuingStrategy !== null);
assert(globalThis.ByteLengthQueuingStrategy !== null);
});
Deno.test(function windowNameIsDefined() {
assertEquals(typeof globalThis.name, "string");
assertEquals(name, "");
assertEquals(window.name, name);
name = "foobar";
assertEquals(window.name, "foobar");
assertEquals(name, "foobar");
name = "";
assertEquals(window.name, "");
assertEquals(name, "");
});
Deno.test(async function promiseWithResolvers() {
{
const { promise, resolve } = Promise.withResolvers();
resolve(true);
assert(await promise);
}
{
const { promise, reject } = Promise.withResolvers();
reject(new Error("boom!"));
await assertRejects(() => promise, Error, "boom!");
}
});