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-// Copyright 2008 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * @fileoverview This file defines base classes used for creating mocks in
- * JavaScript. The API was inspired by EasyMock.
- *
- * The basic API is:
- * <ul>
- *   <li>Create an object to be mocked
- *   <li>Create a mock object, passing in the above object to the constructor
- *   <li>Set expectations by calling methods on the mock object
- *   <li>Call $replay() on the mock object
- *   <li>Pass the mock to code that will make real calls on it
- *   <li>Call $verify() to make sure that expectations were met
- * </ul>
- *
- * For examples, please see the unit tests for LooseMock and StrictMock.
- *
- * Still TODO
- *   implement better (and pluggable) argument matching
- *   Have the exceptions for LooseMock show the number of expected/actual calls
- *   loose and strict mocks share a lot of code - move it to the base class
- *
- */
-
-goog.provide('goog.testing.Mock');
-goog.provide('goog.testing.MockExpectation');
-
-goog.require('goog.array');
-goog.require('goog.object');
-goog.require('goog.testing.JsUnitException');
-goog.require('goog.testing.MockInterface');
-goog.require('goog.testing.mockmatchers');
-
-
-
-/**
- * This is a class that represents an expectation.
- * @param {string} name The name of the method for this expectation.
- * @constructor
- */
-goog.testing.MockExpectation = function(name) {
-  /**
-   * The name of the method that is expected to be called.
-   * @type {string}
-   */
-  this.name = name;
-
-  /**
-   * An array of error messages for expectations not met.
-   * @type {Array}
-   */
-  this.errorMessages = [];
-};
-
-
-/**
- * The minimum number of times this method should be called.
- * @type {number}
- */
-goog.testing.MockExpectation.prototype.minCalls = 1;
-
-
-/**
-  * The maximum number of times this method should be called.
-  * @type {number}
-  */
-goog.testing.MockExpectation.prototype.maxCalls = 1;
-
-
-/**
- * The value that this method should return.
- * @type {*}
- */
-goog.testing.MockExpectation.prototype.returnValue;
-
-
-/**
- * The value that will be thrown when the method is called
- * @type {*}
- */
-goog.testing.MockExpectation.prototype.exceptionToThrow;
-
-
-/**
- * The arguments that are expected to be passed to this function
- * @type {Array.<*>}
- */
-goog.testing.MockExpectation.prototype.argumentList;
-
-
-/**
- * The number of times this method is called by real code.
- * @type {number}
- */
-goog.testing.MockExpectation.prototype.actualCalls = 0;
-
-
-/**
- * The number of times this method is called during the verification phase.
- * @type {number}
- */
-goog.testing.MockExpectation.prototype.verificationCalls = 0;
-
-
-/**
- * The function which will be executed when this method is called.
- * Method arguments will be passed to this function, and return value
- * of this function will be returned by the method.
- * @type {Function}
- */
-goog.testing.MockExpectation.prototype.toDo;
-
-
-/**
- * Allow expectation failures to include messages.
- * @param {string} message The failure message.
- */
-goog.testing.MockExpectation.prototype.addErrorMessage = function(message) {
-  this.errorMessages.push(message);
-};
-
-
-/**
- * Get the error messages seen so far.
- * @return {string} Error messages separated by \n.
- */
-goog.testing.MockExpectation.prototype.getErrorMessage = function() {
-  return this.errorMessages.join('\n');
-};
-
-
-/**
- * Get how many error messages have been seen so far.
- * @return {number} Count of error messages.
- */
-goog.testing.MockExpectation.prototype.getErrorMessageCount = function() {
-  return this.errorMessages.length;
-};
-
-
-
-/**
- * The base class for a mock object.
- * @param {Object|Function} objectToMock The object that should be mocked, or
- *    the constructor of an object to mock.
- * @param {boolean=} opt_mockStaticMethods An optional argument denoting that
- *     a mock should be constructed from the static functions of a class.
- * @param {boolean=} opt_createProxy An optional argument denoting that
- *     a proxy for the target mock should be created.
- * @constructor
- * @implements {goog.testing.MockInterface}
- */
-goog.testing.Mock = function(objectToMock, opt_mockStaticMethods,
-    opt_createProxy) {
-  if (!goog.isObject(objectToMock) && !goog.isFunction(objectToMock)) {
-    throw new Error('objectToMock must be an object or constructor.');
-  }
-  if (opt_createProxy && !opt_mockStaticMethods &&
-      goog.isFunction(objectToMock)) {
-    /** @constructor */
-    function tempCtor() {};
-    goog.inherits(tempCtor, objectToMock);
-    this.$proxy = new tempCtor();
-  } else if (opt_createProxy && opt_mockStaticMethods &&
-      goog.isFunction(objectToMock)) {
-    throw Error('Cannot create a proxy when opt_mockStaticMethods is true');
-  } else if (opt_createProxy && !goog.isFunction(objectToMock)) {
-    throw Error('Must have a constructor to create a proxy');
-  }
-
-  if (goog.isFunction(objectToMock) && !opt_mockStaticMethods) {
-    this.$initializeFunctions_(objectToMock.prototype);
-  } else {
-    this.$initializeFunctions_(objectToMock);
-  }
-  this.$argumentListVerifiers_ = {};
-};
-
-
-/**
- * Option that may be passed when constructing function, method, and
- * constructor mocks. Indicates that the expected calls should be accepted in
- * any order.
- * @const
- * @type {number}
- */
-goog.testing.Mock.LOOSE = 1;
-
-
-/**
- * Option that may be passed when constructing function, method, and
- * constructor mocks. Indicates that the expected calls should be accepted in
- * the recorded order only.
- * @const
- * @type {number}
- */
-goog.testing.Mock.STRICT = 0;
-
-
-/**
- * This array contains the name of the functions that are part of the base
- * Object prototype.
- * Basically a copy of goog.object.PROTOTYPE_FIELDS_.
- * @const
- * @type {!Array.<string>}
- * @private
- */
-goog.testing.Mock.PROTOTYPE_FIELDS_ = [
-  'constructor',
-  'hasOwnProperty',
-  'isPrototypeOf',
-  'propertyIsEnumerable',
-  'toLocaleString',
-  'toString',
-  'valueOf'
-];
-
-
-/**
- * A proxy for the mock.  This can be used for dependency injection in lieu of
- * the mock if the test requires a strict instanceof check.
- * @type {Object}
- */
-goog.testing.Mock.prototype.$proxy = null;
-
-
-/**
- * Map of argument name to optional argument list verifier function.
- * @type {Object}
- */
-goog.testing.Mock.prototype.$argumentListVerifiers_;
-
-
-/**
- * Whether or not we are in recording mode.
- * @type {boolean}
- * @private
- */
-goog.testing.Mock.prototype.$recording_ = true;
-
-
-/**
- * The expectation currently being created. All methods that modify the
- * current expectation return the Mock object for easy chaining, so this is
- * where we keep track of the expectation that's currently being modified.
- * @type {goog.testing.MockExpectation}
- * @protected
- */
-goog.testing.Mock.prototype.$pendingExpectation;
-
-
-/**
- * First exception thrown by this mock; used in $verify.
- * @type {Object}
- * @private
- */
-goog.testing.Mock.prototype.$threwException_ = null;
-
-
-/**
- * Initializes the functions on the mock object.
- * @param {Object} objectToMock The object being mocked.
- * @private
- */
-goog.testing.Mock.prototype.$initializeFunctions_ = function(objectToMock) {
-  // Gets the object properties.
-  var enumerableProperties = goog.object.getKeys(objectToMock);
-
-  // The non enumerable properties are added if they override the ones in the
-  // Object prototype. This is due to the fact that IE8 does not enumerate any
-  // of the prototype Object functions even when overriden and mocking these is
-  // sometimes needed.
-  for (var i = 0; i < goog.testing.Mock.PROTOTYPE_FIELDS_.length; i++) {
-    var prop = goog.testing.Mock.PROTOTYPE_FIELDS_[i];
-    // Look at b/6758711 if you're considering adding ALL properties to ALL
-    // mocks.
-    if (objectToMock[prop] !== Object.prototype[prop]) {
-      enumerableProperties.push(prop);
-    }
-  }
-
-  // Adds the properties to the mock.
-  for (var i = 0; i < enumerableProperties.length; i++) {
-    var prop = enumerableProperties[i];
-    if (typeof objectToMock[prop] == 'function') {
-      this[prop] = goog.bind(this.$mockMethod, this, prop);
-      if (this.$proxy) {
-        this.$proxy[prop] = goog.bind(this.$mockMethod, this, prop);
-      }
-    }
-  }
-};
-
-
-/**
- * Registers a verfifier function to use when verifying method argument lists.
- * @param {string} methodName The name of the method for which the verifierFn
- *     should be used.
- * @param {Function} fn Argument list verifier function.  Should take 2 argument
- *     arrays as arguments, and return true if they are considered equivalent.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$registerArgumentListVerifier = function(methodName,
-                                                                     fn) {
-  this.$argumentListVerifiers_[methodName] = fn;
-  return this;
-};
-
-
-/**
- * The function that replaces all methods on the mock object.
- * @param {string} name The name of the method being mocked.
- * @return {*} In record mode, returns the mock object. In replay mode, returns
- *    whatever the creator of the mock set as the return value.
- */
-goog.testing.Mock.prototype.$mockMethod = function(name) {
-  try {
-    // Shift off the name argument so that args contains the arguments to
-    // the mocked method.
-    var args = goog.array.slice(arguments, 1);
-    if (this.$recording_) {
-      this.$pendingExpectation = new goog.testing.MockExpectation(name);
-      this.$pendingExpectation.argumentList = args;
-      this.$recordExpectation();
-      return this;
-    } else {
-      return this.$recordCall(name, args);
-    }
-  } catch (ex) {
-    this.$recordAndThrow(ex);
-  }
-};
-
-
-/**
- * Records the currently pending expectation, intended to be overridden by a
- * subclass.
- * @protected
- */
-goog.testing.Mock.prototype.$recordExpectation = function() {};
-
-
-/**
- * Records an actual method call, intended to be overridden by a
- * subclass. The subclass must find the pending expectation and return the
- * correct value.
- * @param {string} name The name of the method being called.
- * @param {Array} args The arguments to the method.
- * @return {*} The return expected by the mock.
- * @protected
- */
-goog.testing.Mock.prototype.$recordCall = function(name, args) {
-  return undefined;
-};
-
-
-/**
- * If the expectation expects to throw, this method will throw.
- * @param {goog.testing.MockExpectation} expectation The expectation.
- */
-goog.testing.Mock.prototype.$maybeThrow = function(expectation) {
-  if (typeof expectation.exceptionToThrow != 'undefined') {
-    throw expectation.exceptionToThrow;
-  }
-};
-
-
-/**
- * If this expectation defines a function to be called,
- * it will be called and its result will be returned.
- * Otherwise, if the expectation expects to throw, it will throw.
- * Otherwise, this method will return defined value.
- * @param {goog.testing.MockExpectation} expectation The expectation.
- * @param {Array} args The arguments to the method.
- * @return {*} The return value expected by the mock.
- */
-goog.testing.Mock.prototype.$do = function(expectation, args) {
-  if (typeof expectation.toDo == 'undefined') {
-    this.$maybeThrow(expectation);
-    return expectation.returnValue;
-  } else {
-    return expectation.toDo.apply(this, args);
-  }
-};
-
-
-/**
- * Specifies a return value for the currently pending expectation.
- * @param {*} val The return value.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$returns = function(val) {
-  this.$pendingExpectation.returnValue = val;
-  return this;
-};
-
-
-/**
- * Specifies a value for the currently pending expectation to throw.
- * @param {*} val The value to throw.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$throws = function(val) {
-  this.$pendingExpectation.exceptionToThrow = val;
-  return this;
-};
-
-
-/**
- * Specifies a function to call for currently pending expectation.
- * Note, that using this method overrides declarations made
- * using $returns() and $throws() methods.
- * @param {Function} func The function to call.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$does = function(func) {
-  this.$pendingExpectation.toDo = func;
-  return this;
-};
-
-
-/**
- * Allows the expectation to be called 0 or 1 times.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$atMostOnce = function() {
-  this.$pendingExpectation.minCalls = 0;
-  this.$pendingExpectation.maxCalls = 1;
-  return this;
-};
-
-
-/**
- * Allows the expectation to be called any number of times, as long as it's
- * called once.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$atLeastOnce = function() {
-  this.$pendingExpectation.maxCalls = Infinity;
-  return this;
-};
-
-
-/**
- * Allows the expectation to be called any number of times.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$anyTimes = function() {
-  this.$pendingExpectation.minCalls = 0;
-  this.$pendingExpectation.maxCalls = Infinity;
-  return this;
-};
-
-
-/**
- * Specifies the number of times the expectation should be called.
- * @param {number} times The number of times this method will be called.
- * @return {goog.testing.Mock} This mock object.
- */
-goog.testing.Mock.prototype.$times = function(times) {
-  this.$pendingExpectation.minCalls = times;
-  this.$pendingExpectation.maxCalls = times;
-  return this;
-};
-
-
-/**
- * Switches from recording to replay mode.
- * @override
- */
-goog.testing.Mock.prototype.$replay = function() {
-  this.$recording_ = false;
-};
-
-
-/**
- * Resets the state of this mock object. This clears all pending expectations
- * without verifying, and puts the mock in recording mode.
- * @override
- */
-goog.testing.Mock.prototype.$reset = function() {
-  this.$recording_ = true;
-  this.$threwException_ = null;
-  delete this.$pendingExpectation;
-};
-
-
-/**
- * Throws an exception and records that an exception was thrown.
- * @param {string} comment A short comment about the exception.
- * @param {?string=} opt_message A longer message about the exception.
- * @throws {Object} JsUnitException object.
- * @protected
- */
-goog.testing.Mock.prototype.$throwException = function(comment, opt_message) {
-  this.$recordAndThrow(new goog.testing.JsUnitException(comment, opt_message));
-};
-
-
-/**
- * Throws an exception and records that an exception was thrown.
- * @param {Object} ex Exception.
- * @throws {Object} #ex.
- * @protected
- */
-goog.testing.Mock.prototype.$recordAndThrow = function(ex) {
-  // If it's an assert exception, record it.
-  if (ex['isJsUnitException']) {
-    var testRunner = goog.global['G_testRunner'];
-    if (testRunner) {
-      var logTestFailureFunction = testRunner['logTestFailure'];
-      if (logTestFailureFunction) {
-        logTestFailureFunction.call(testRunner, ex);
-      }
-    }
-
-    if (!this.$threwException_) {
-      // Only remember first exception thrown.
-      this.$threwException_ = ex;
-    }
-  }
-  throw ex;
-};
-
-
-/**
- * Verify that all of the expectations were met. Should be overridden by
- * subclasses.
- * @override
- */
-goog.testing.Mock.prototype.$verify = function() {
-  if (this.$threwException_) {
-    throw this.$threwException_;
-  }
-};
-
-
-/**
- * Verifies that a method call matches an expectation.
- * @param {goog.testing.MockExpectation} expectation The expectation to check.
- * @param {string} name The name of the called method.
- * @param {Array.<*>?} args The arguments passed to the mock.
- * @return {boolean} Whether the call matches the expectation.
- */
-goog.testing.Mock.prototype.$verifyCall = function(expectation, name, args) {
-  if (expectation.name != name) {
-    return false;
-  }
-  var verifierFn =
-      this.$argumentListVerifiers_.hasOwnProperty(expectation.name) ?
-      this.$argumentListVerifiers_[expectation.name] :
-      goog.testing.mockmatchers.flexibleArrayMatcher;
-
-  return verifierFn(expectation.argumentList, args, expectation);
-};
-
-
-/**
- * Render the provided argument array to a string to help
- * clients with debugging tests.
- * @param {Array.<*>?} args The arguments passed to the mock.
- * @return {string} Human-readable string.
- */
-goog.testing.Mock.prototype.$argumentsAsString = function(args) {
-  var retVal = [];
-  for (var i = 0; i < args.length; i++) {
-    try {
-      retVal.push(goog.typeOf(args[i]));
-    } catch (e) {
-      retVal.push('[unknown]');
-    }
-  }
-  return '(' + retVal.join(', ') + ')';
-};
-
-
-/**
- * Throw an exception based on an incorrect method call.
- * @param {string} name Name of method called.
- * @param {Array.<*>?} args Arguments passed to the mock.
- * @param {goog.testing.MockExpectation=} opt_expectation Expected next call,
- *     if any.
- */
-goog.testing.Mock.prototype.$throwCallException = function(name, args,
-                                                           opt_expectation) {
-  var errorStringBuffer = [];
-  var actualArgsString = this.$argumentsAsString(args);
-  var expectedArgsString = opt_expectation ?
-      this.$argumentsAsString(opt_expectation.argumentList) : '';
-
-  if (opt_expectation && opt_expectation.name == name) {
-    errorStringBuffer.push('Bad arguments to ', name, '().\n',
-                           'Actual: ', actualArgsString, '\n',
-                           'Expected: ', expectedArgsString, '\n',
-                           opt_expectation.getErrorMessage());
-  } else {
-    errorStringBuffer.push('Unexpected call to ', name,
-                           actualArgsString, '.');
-    if (opt_expectation) {
-      errorStringBuffer.push('\nNext expected call was to ',
-                             opt_expectation.name,
-                             expectedArgsString);
-    }
-  }
-  this.$throwException(errorStringBuffer.join(''));
-};