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gaia/shared/test/integration/manager_mock.js

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+/* global module, __dirname */
+'use strict';
+
+var fs = require('fs');
+
+/**
+ * MockManager is in charge of finding and injecting the mock files. They can be
+ * located either at the app level in apps/$APP/test/marionette/mocks/ or at the
+ * global level in shared/test/integration
+ * @param {Marionette.Client} client Marionette client to use.
+ * @param {String} app App folder to look into
+ * @constructor
+*/
+function MockManager(client, appName) {
+  this.client = client;
+  this.potentialDirs = [
+    __dirname + '/../../../apps/' + appName + '/test/marionette/mocks/',
+    __dirname + '/' // points to shared/test/integration/
+  ];
+}
+
+MockManager.prototype = {
+  inject: function(mocks) {
+    mocks = Array.isArray(mocks) ? mocks : [mocks];
+    mocks.forEach(function(mockName) {
+      this._injectSingle(mockName);
+    }, this);
+  },
+
+  _injectSingle: function(mockName) {
+    var fileName = 'mock_' + mockName + '.js';
+    var filePath = this._findFilePath(fileName);
+    this.client.contentScript.inject(filePath);
+  },
+
+  _findFilePath: function(fileName) {
+    var index = this.potentialDirs.findIndex(function(dir) {
+      return this._isFileAccessible(dir + fileName);
+    }, this);
+
+    if(index === -1) {
+      throw new Error(fileName + ' was not found');
+    }
+
+    return this.potentialDirs[index] + fileName;
+  },
+
+  _isFileAccessible: function(filePath) {
+    try {
+      fs.accessSync(filePath);
+      return true;
+    } catch(e) {
+      return false;
+    }
+  }
+};
+
+module.exports = MockManager;