@protonapp/react-native-material-ui/src/utils/__test__/isFunction.test.js

React Native Material Design Components

import isFunction from '../isFunction';

describe('isFunction()', () => {
  it('isFunction', () => {
    expect(isFunction()).toBeFalsy();
    expect(isFunction('a')).toBeFalsy();
    expect(isFunction(() => {})).toBeTruthy();
  });
});