import { assertEquals } from "https://deno.land/std/testing/asserts.ts";
import { bool, cmp, is } from "./comparison.ts";

Deno.test("cmp", () => {
  assertEquals([8, 3, 5].sort(cmp()), [3, 5, 8]);
  assertEquals([8, 3, 5, 8].sort(cmp({ reverse: true })), [8, 8, 5, 3]);
  assertEquals([-2, 8, -7].sort(cmp({ key: Math.abs })), [-2, -7, 8]);
  assertEquals(["c", "a", "b"].sort(cmp()), ["a", "b", "c"]);
});

Deno.test("is", () => {
  const f1 = is(5);
  assertEquals(f1(5), true);
  assertEquals(f1(4), false);
  assertEquals(f1("a" as any), false);
  assertEquals(f1(null as any), false);
  assertEquals(f1(undefined as any), false);

  const obj: { x: number } = { x: 1 };
  let f2 = is(obj);
  assertEquals(f2(obj), true);
  assertEquals(f2({ x: 1 }), false);
  assertEquals(f2({ y: 1 } as any), false);
});

Deno.test("bool", () => {
  assertEquals(bool(null), false);
  assertEquals(bool(undefined), false);

  assertEquals(bool(false), false);
  assertEquals(bool(true), true);

  assertEquals(bool(-1), true);
  assertEquals(bool(0), false);
  assertEquals(bool(1), true);

  assertEquals(bool(""), false);
  assertEquals(bool(" "), true);
  assertEquals(bool("abc"), true);

  assertEquals(bool([]), false);
  assertEquals(bool([0]), true);
  assertEquals(bool([1, 2, 3]), true);

  assertEquals(bool(new Set()), false);
  assertEquals(bool(new Set([0])), true);
  assertEquals(bool(new Set([1, 2, 3])), true);

  assertEquals(bool({}), false);
  assertEquals(bool({ a: 5 }), true);

  class Obj1 {}
  class Obj2 {
    private x = 0;
  }
  assertEquals(bool(new Obj1()), false);
  assertEquals(bool(new Obj2()), true);
});