import { isEmpty } from './isEmpty';

describe('isEmpty', () => {
  test('should return true for null', () => {
    const result = isEmpty(null);
    expect(result).toBe(true);
  });

  test('should return true for undefined', () => {
    const result = isEmpty(undefined);
    expect(result).toBe(true);
  });

  test('should return true for an empty string', () => {
    const result = isEmpty('');
    expect(result).toBe(true);
  });

  test('should return true for an empty array', () => {
    const result = isEmpty([]);
    expect(result).toBe(true);
  });

  test('should return true for an empty object', () => {
    const result = isEmpty({});
    expect(result).toBe(true);
  });

  test('should return false for a non-empty string', () => {
    const result = isEmpty('Hello');
    expect(result).toBe(false);
  });

  test('should return false for a non-empty array', () => {
    const result = isEmpty([1, 2, 3]);
    expect(result).toBe(false);
  });

  test('should return false for a non-empty object', () => {
    const result = isEmpty({ a: 1 });
    expect(result).toBe(false);
  });
});