import { setupWatch } from '../src/fileWatch';
import { expect } from 'chai';
import { stub, createStubInstance } from 'sinon';
import CheapWatch from 'cheap-watch';
import signal from 'signal-js';

describe('fileWatch', () => {
  describe('setupWatch', () => {
    it('should exist', () => {
      expect(setupWatch).to.exist;
    });

    it('should instantiate and initialize CheapWatch', async () => {
      const consoleStub = stub(console, 'log');
      const watchInstance = createStubInstance(CheapWatch);
      const watchConstructorStub = stub().returns(watchInstance);
      Object.setPrototypeOf(CheapWatch, watchConstructorStub);

      const result = await setupWatch(signal);

      expect(result).to.eq(watchInstance);
      expect(watchConstructorStub).to.have.been.called;
      expect(watchInstance.init).to.have.been.called;
      expect(watchInstance.on).to.have.been.calledTwice;

      consoleStub.restore();
    });
  });
});