ladybird/Libraries/LibJS/Tests/functions/function-this-in-arguments.js

test("basic functionality", () => {
  expect(typeof this).toBe("object");
  expect(this).toBe(globalThis);
});

test("this inside instantiated functions is not globalThis", () => {
  let functionThis;
  function Foo() {
    this.x = 5;
    functionThis = this;
  }

  new Foo();
  expect(typeof functionThis).toBe("object");
  expect(functionThis.x).toBe(5);
});