ladybird/Libraries/LibJS/Tests/builtins/Boolean/Boolean.js

test("constructor properties", () => {
  expect(Boolean).toHaveLength(1);
  expect(Boolean.name).toBe("Boolean");
});

test("typeof", () => {
  expect(typeof new Boolean()).toBe("object");
  expect(typeof Boolean()).toBe("boolean");
  expect(typeof Boolean(true)).toBe("boolean");
});

test("basic functionality", () => {
  var foo = new Boolean(true);
  var bar = new Boolean(true);

  expect(foo).not.toBe(bar);
  expect(foo.valueOf()).toBe(bar.valueOf());

  expect(Boolean()).toBeFalse();
  expect(Boolean(false)).toBeFalse();
  expect(Boolean(null)).toBeFalse();
  expect(Boolean(undefined)).toBeFalse();
  expect(Boolean(NaN)).toBeFalse();
  expect(Boolean("")).toBeFalse();
  expect(Boolean(0.0)).toBeFalse();
  expect(Boolean(-0.0)).toBeFalse();
  expect(Boolean(true)).toBeTrue();
  expect(Boolean("0")).toBeTrue();
  expect(Boolean({})).toBeTrue();
  expect(Boolean([])).toBeTrue();
  expect(Boolean(1)).toBeTrue();
});