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gaia/tests/jsmarionette/runner/marionette-js-runner/test/helper.js

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+'use strict';
+var EventEmitter = require('events').EventEmitter;
+var assert = require('chai').assert;
+var spawn = require('child_process').spawn;
+
+global.assert = assert;
+global.sinon = require('sinon');
+
+// so we can call assert.calledWith
+global.sinon.assert.expose(assert, { prefix: '' });
+
+function env() {
+  var vars = {};
+  for (var key in process.env) vars[key] = process.env[key];
+  vars.MOCHA_COLORS = '0';
+  return vars;
+}
+
+function spawnMocha(argv) {
+  var mocha = __dirname + '/../../.bin/mocha';
+  return spawn(mocha, argv, { env: env() });
+}
+
+function spawnMarionette(argv) {
+  var bin = __dirname + '/../bin/marionette-mocha';
+  argv.push('--runtime');
+  argv.push(__dirname + '/../../../b2g/b2g-bin');
+  return spawn(bin, argv, { env: env() });
+}
+
+function mockProcessSend() {
+  var refs = {},
+      originalSend;
+
+  // spy on process.send
+  setup(function() {
+    var sent = refs.sent = new EventEmitter();
+    originalSend = process.send;
+
+    process.send = function(event) {
+      if (Array.isArray(event) && typeof event[0] === 'string') {
+        sent.emit.apply(sent, event);
+      }
+
+      // if there is a send method use it.
+      if (originalSend) {
+        originalSend.apply(this, arguments);
+      }
+    };
+  });
+
+  teardown(function() {
+    process.send = originalSend;
+  });
+
+  return refs;
+}
+
+global.mockProcessSend = mockProcessSend;
+global.spawnMocha = spawnMocha;
+global.spawnMarionette = spawnMarionette;