Userland/Libraries/LibJS/Tests/functions/function-length.js at master

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serenity / Userland / Libraries / LibJS / Tests / functions / function-length.js

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 1test("basic functionality", () => {
 2    function foo() {}
 3    expect(foo).toHaveLength(0);
 4    expect((foo.length = 5)).toBe(5);
 5    expect(foo).toHaveLength(0);
 6
 7    function bar(a, b, c) {}
 8    expect(bar).toHaveLength(3);
 9    expect((bar.length = 5)).toBe(5);
10    expect(bar).toHaveLength(3);
11});
12
13test("functions with special parameter lists", () => {
14    function baz(a, b = 1, c) {}
15    expect(baz).toHaveLength(1);
16    expect((baz.length = 5)).toBe(5);
17    expect(baz).toHaveLength(1);
18
19    function qux(a, b, ...c) {}
20    expect(qux).toHaveLength(2);
21    expect((qux.length = 2)).toBe(2);
22    expect(qux).toHaveLength(2);
23});