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

import isObject from '../../utils/isObject';

describe('isObject', () => {
  it('should return true when value is an object', () => {
    expect(isObject({})).toBeTruthy();
    expect(isObject({ foo: 'bar' })).toBeTruthy();
    expect(isObject(new Blob())).toBeTruthy();
  });

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