[test] Add useful mocks

This adds basic mocks for:

  * `ChildProcess`
  * `Stream`
  * `forever.Monitor`

test/helpers/mocks/child-process.js

@@ -0,0 +1,12 @@
+var util = require('util'),
+    EventEmitter2 = require('eventemitter2').EventEmitter2,
+    StreamMock = require('./stream').StreamMock;
+
+var ChildProcessMock = exports.ChildProcessMock = function () {
+  EventEmitter2.call(this);
+
+  this.stdout = new StreamMock();
+  this.stderr = new StreamMock();
+};
+util.inherits(ChildProcessMock, EventEmitter2);
+

test/helpers/mocks/monitor.js

@@ -0,0 +1,11 @@
+var util = require('util'),
+    broadway = require('broadway'),
+    ChildProcessMock = require('./child-process').ChildProcessMock;
+
+var MonitorMock = exports.MonitorMock = function (options) {
+  broadway.App.call(this, options);
+
+  this.child = new ChildProcessMock();
+};
+util.inherits(MonitorMock, broadway.App);
+

test/helpers/mocks/stream.js

@@ -0,0 +1,19 @@
+var util = require('util'),
+    EventEmitter2 = require('eventemitter2').EventEmitter2;
+
+var StreamMock = exports.StreamMock = function () {
+  EventEmitter2.call(this);
+
+  this.contents = [];
+  this.closed = false;
+};
+util.inherits(StreamMock, EventEmitter2);
+
+StreamMock.prototype.write = function (data) {
+  this.contents.push(data);
+};
+
+StreamMock.prototype.close = function () {
+  this.closed = true;
+};
+