import { describe, expect, it } from "vitest";
import { isPlainObject } from "./plain-object.js";

describe("isPlainObject", () => {
  it.each([{}, { a: 1 }, Object.create(null), new (class X {})()])(
    "accepts object-tag values: %j",
    (value) => {
      expect(isPlainObject(value)).toBe(true);
    },
  );

  it.each([null, [], new Date(), /re/, "x", 42, () => null, new Map()])(
    "rejects non-plain values: %j",
    (value) => {
      expect(isPlainObject(value)).toBe(false);
    },
  );
});