ladybird/Libraries/LibJS/Tests/variable-undefined.js

14 lines
265 B
JavaScript

test("basic functionality", () => {
function foo(a) {
return a;
}
var x = undefined;
expect(x).toBeUndefined();
expect(foo(x)).toBeUndefined();
var o = {};
o.x = x;
expect(o.x).toBeUndefined();
expect(o.x).toBe(x);
});