text: const newsletter = require('./newsletter.js');
  const messageStub = require('../stub/messageStub');
  
  
  test('Sends newletter link to channel', async () => {
  	// Arrange
  	const message = new messageStub();
  
  	// Act
  	const responseMessage = await newsletter.execute(null, message);
  
  	// Assert
  	const expectedResponse = 'The newest newsletter from...';
  	expect(responseMessage[0]).toBe(expectedResponse[0]);
  });