import { compose } from '../compose';

describe('utils -> compose', () => {
  it('compose', () => {
    const original = param => `original${param}`;
    const middlewares = [(next) => (param) => {
      console.log('111');
      return next(param);
    }, (next) => (param) => {
      console.log('222');
      return next(param);
    }, (next) => (param) => {
      console.log('333');
      return next(param);
    }];
    const enhanced = compose(...middlewares)(original);
    expect(enhanced('test')).toBe('originaltest');
  });

  it('compose one middleware', () => {
    const original = param => `original${param}`;
    const middlewares = [(next) => (param) => {
      console.log('111');
      return next(param);
    }];
    const enhanced = compose(...middlewares)(original);
    expect(enhanced('test')).toBe('originaltest');
  });

  it('compose no middleware', () => {
    const original = param => `original${param}`;
    const middlewares = [];
    const enhanced = compose(...middlewares)(original);
    expect(enhanced('test')).toBe('originaltest');
  });
});