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node_modules/event-emitter/test/pipe.js 972 Bytes
aaac7fed   liuqimichale   add
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  'use strict';
  
  var ee = require('../');
  
  module.exports = function (t, a) {
  	var x = {}, y = {}, z = {}, count, count2, count3, pipe;
  
  	ee(x);
  	x = Object.create(x);
  	ee(y);
  	ee(z);
  
  	count = 0;
  	count2 = 0;
  	count3 = 0;
  	x.on('foo', function () {
  		++count;
  	});
  	y.on('foo', function () {
  		++count2;
  	});
  	z.on('foo', function () {
  		++count3;
  	});
  
  	x.emit('foo');
  	a(count, 1, "Pre pipe, x");
  	a(count2, 0, "Pre pipe, y");
  	a(count3, 0, "Pre pipe, z");
  
  	pipe = t(x, y);
  	x.emit('foo');
  	a(count, 2, "Post pipe, x");
  	a(count2, 1, "Post pipe, y");
  	a(count3, 0, "Post pipe, z");
  
  	y.emit('foo');
  	a(count, 2, "Post pipe, on y, x");
  	a(count2, 2, "Post pipe, on y, y");
  	a(count3, 0, "Post pipe, on y, z");
  
  	t(x, z);
  	x.emit('foo');
  	a(count, 3, "Post pipe z, x");
  	a(count2, 3, "Post pipe z, y");
  	a(count3, 1, "Post pipe z, z");
  
  	pipe.close();
  	x.emit('foo');
  	a(count, 4, "Close pipe y, x");
  	a(count2, 3, "Close pipe y, y");
  	a(count3, 2, "Close pipe y, z");
  };