react-hook-form/src/__tests__/utils/isEmptyObject.test.ts

import isEmptyObject from '../../utils/isEmptyObject';

describe('isEmptyObject', () => {
  it('should return true when value is an empty object', () => {
    expect(isEmptyObject({})).toBeTruthy();
  });

  it('should return false when value is not an empty object', () => {
    expect(isEmptyObject(null)).toBeFalsy();
    expect(isEmptyObject(undefined)).toBeFalsy();
    expect(isEmptyObject(-1)).toBeFalsy();
    expect(isEmptyObject(0)).toBeFalsy();
    expect(isEmptyObject(1)).toBeFalsy();
    expect(isEmptyObject('')).toBeFalsy();
    expect(isEmptyObject(() => null)).toBeFalsy();
    expect(isEmptyObject({ foo: 'bar' })).toBeFalsy();
    expect(isEmptyObject([])).toBeFalsy();
    expect(isEmptyObject(['foo', 'bar'])).toBeFalsy();
  });
});