import { describe, expect, test } from "bun:test";
import { isPlainObject } from "../is-plain-object";

describe("isPlainObject", () => {
  test("accepts plain objects", () => {
    expect(isPlainObject({})).toBe(true);
    expect(isPlainObject({ a: 1 })).toBe(true);
  });

  test("rejects null, arrays, and primitives", () => {
    expect(isPlainObject(null)).toBe(false);
    expect(isPlainObject([])).toBe(false);
    expect(isPlainObject("x")).toBe(false);
    expect(isPlainObject(42)).toBe(false);
  });
});