Userland/Libraries/LibJS/Tests/operators/void-basic.js at master

jcs.org / serenity

fork atom

Serenity Operating System

fork atom

serenity / Userland / Libraries / LibJS / Tests / operators / void-basic.js

at master 26 lines 1.1 kB view raw

wrap content

davidot LibJS: Don't treat yield after void as identifier in generator functions 4y ago

c8e80690

 1test("basic functionality", () => {
 2    expect(void "").toBeUndefined();
 3    expect(void "foo").toBeUndefined();
 4    expect(void 1).toBeUndefined();
 5    expect(void 42).toBeUndefined();
 6    expect(void true).toBeUndefined();
 7    expect(void false).toBeUndefined();
 8    expect(void null).toBeUndefined();
 9    expect(void undefined).toBeUndefined();
10    expect(void function () {}).toBeUndefined();
11    expect(void (() => {})).toBeUndefined();
12    expect(void (() => "hello friends")()).toBeUndefined();
13    expect((() => void "hello friends")()).toBeUndefined();
14});
15
16describe("errors", () => {
17    test("treats yield in generator as non variable", () => {
18        expect("function f() { void yield; }").toEval();
19        expect("async function f() { void yield; }").toEval();
20        expect("function *f() { void yield; }").not.toEval();
21        expect("async function *f() { void yield; }").not.toEval();
22
23        expect("class C { *f() { void yield; } }").not.toEval();
24        expect("var obj = { async function *f() { void yield; } }").not.toEval();
25    });
26});