import { expect, it } from "./deps.testing.ts";
import { attr, defined, options } from "./objects.ts";

it("attr", () => {
  const getx = attr("x");
  expect(getx({ x: 4, y: 5 })).toBe(4);
  expect(getx({ x: undefined, y: 5 })).toBeUndefined();
});

it("defined", () => {
  expect(defined({})).toEqual({});
  expect(defined({ x: 1 })).toEqual({ x: 1 });
  expect(defined({ x: 1, y: undefined })).toEqual({ x: 1 });

  const obj = defined({ x: 1, y: undefined });
  // @ts-expect-error
  expect(obj.y).toBeUndefined();
});

it("options", () => {
  expect(options({})).toEqual({});
  expect(options({ x: 1, y: 2 }, { x: 3 })).toEqual({ x: 3, y: 2 });
  expect(options({ x: 1, y: 2 }, { x: 3 }, { x: 4 })).toEqual({ x: 4, y: 2 });
  expect(options({ x: 1, y: 2 }, { x: 3 }, { y: 0 })).toEqual({ x: 3, y: 0 });
  expect(options({ x: 1, y: 2 }, { x: undefined, y: 3 })).toEqual({
    x: 1,
    y: 3,
  });
  // @ts-expect-error
  expect(options({ x: 1 }, { y: 2 })).toEqual({ x: 1, y: 2 });
});