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<!DOCTYPE html><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"><meta http-equiv="Content-Language" content="en"><meta http-equiv="X-UA-Compatible" content="IE=edge"><title>recordfunction.js</title><link href="../../../../dossier.css" rel="stylesheet" type="text/css"><header><div><form><div><input type="search" placeholder="Search" tabindex="1"></div></form></div></header><main><article class="srcfile"><h1>lib/goog/testing/recordfunction.js</h1><div><table><tr><td><a id="l1"></a><a href="#l1">1</a><td>// Copyright 2010 The Closure Library Authors. All Rights Reserved.<tr><td><a id="l2"></a><a href="#l2">2</a><td>//<tr><td><a id="l3"></a><a href="#l3">3</a><td>// Licensed under the Apache License, Version 2.0 (the "License");<tr><td><a id="l4"></a><a href="#l4">4</a><td>// you may not use this file except in compliance with the License.<tr><td><a id="l5"></a><a href="#l5">5</a><td>// You may obtain a copy of the License at<tr><td><a id="l6"></a><a href="#l6">6</a><td>//<tr><td><a id="l7"></a><a href="#l7">7</a><td>// http://www.apache.org/licenses/LICENSE-2.0<tr><td><a id="l8"></a><a href="#l8">8</a><td>//<tr><td><a id="l9"></a><a href="#l9">9</a><td>// Unless required by applicable law or agreed to in writing, software<tr><td><a id="l10"></a><a href="#l10">10</a><td>// distributed under the License is distributed on an "AS-IS" BASIS,<tr><td><a id="l11"></a><a href="#l11">11</a><td>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<tr><td><a id="l12"></a><a href="#l12">12</a><td>// See the License for the specific language governing permissions and<tr><td><a id="l13"></a><a href="#l13">13</a><td>// limitations under the License.<tr><td><a id="l14"></a><a href="#l14">14</a><td><tr><td><a id="l15"></a><a href="#l15">15</a><td>/**<tr><td><a id="l16"></a><a href="#l16">16</a><td> * @fileoverview Helper class for recording the calls of a function.<tr><td><a id="l17"></a><a href="#l17">17</a><td> *<tr><td><a id="l18"></a><a href="#l18">18</a><td> * Example:<tr><td><a id="l19"></a><a href="#l19">19</a><td> * <pre><tr><td><a id="l20"></a><a href="#l20">20</a><td> * var stubs = new goog.testing.PropertyReplacer();<tr><td><a id="l21"></a><a href="#l21">21</a><td> *<tr><td><a id="l22"></a><a href="#l22">22</a><td> * function tearDown() {<tr><td><a id="l23"></a><a href="#l23">23</a><td> * stubs.reset();<tr><td><a id="l24"></a><a href="#l24">24</a><td> * }<tr><td><a id="l25"></a><a href="#l25">25</a><td> *<tr><td><a id="l26"></a><a href="#l26">26</a><td> * function testShuffle() {<tr><td><a id="l27"></a><a href="#l27">27</a><td> * stubs.set(Math, 'random', goog.testing.recordFunction(Math.random));<tr><td><a id="l28"></a><a href="#l28">28</a><td> * var arr = shuffle([1, 2, 3, 4, 5]);<tr><td><a id="l29"></a><a href="#l29">29</a><td> * assertSameElements([1, 2, 3, 4, 5], arr);<tr><td><a id="l30"></a><a href="#l30">30</a><td> * assertEquals(4, Math.random.getCallCount());<tr><td><a id="l31"></a><a href="#l31">31</a><td> * }<tr><td><a id="l32"></a><a href="#l32">32</a><td> *<tr><td><a id="l33"></a><a href="#l33">33</a><td> * function testOpenDialog() {<tr><td><a id="l34"></a><a href="#l34">34</a><td> * stubs.set(goog.ui, 'Dialog',<tr><td><a id="l35"></a><a href="#l35">35</a><td> * goog.testing.recordConstructor(goog.ui.Dialog));<tr><td><a id="l36"></a><a href="#l36">36</a><td> * openConfirmDialog();<tr><td><a id="l37"></a><a href="#l37">37</a><td> * var lastDialogInstance = goog.ui.Dialog.getLastCall().getThis();<tr><td><a id="l38"></a><a href="#l38">38</a><td> * assertEquals('confirm', lastDialogInstance.getTitle());<tr><td><a id="l39"></a><a href="#l39">39</a><td> * }<tr><td><a id="l40"></a><a href="#l40">40</a><td> * </pre><tr><td><a id="l41"></a><a href="#l41">41</a><td> *<tr><td><a id="l42"></a><a href="#l42">42</a><td> */<tr><td><a id="l43"></a><a href="#l43">43</a><td><tr><td><a id="l44"></a><a href="#l44">44</a><td>goog.provide('goog.testing.FunctionCall');<tr><td><a id="l45"></a><a href="#l45">45</a><td>goog.provide('goog.testing.recordConstructor');<tr><td><a id="l46"></a><a href="#l46">46</a><td>goog.provide('goog.testing.recordFunction');<tr><td><a id="l47"></a><a href="#l47">47</a><td><tr><td><a id="l48"></a><a href="#l48">48</a><td>goog.require('goog.testing.asserts');<tr><td><a id="l49"></a><a href="#l49">49</a><td><tr><td><a id="l50"></a><a href="#l50">50</a><td><tr><td><a id="l51"></a><a href="#l51">51</a><td>/**<tr><td><a id="l52"></a><a href="#l52">52</a><td> * Wraps the function into another one which calls the inner function and<tr><td><a id="l53"></a><a href="#l53">53</a><td> * records its calls. The recorded function will have 3 static methods:<tr><td><a id="l54"></a><a href="#l54">54</a><td> * {@code getCallCount}, {@code getCalls} and {@code getLastCall} but won't<tr><td><a id="l55"></a><a href="#l55">55</a><td> * inherit the original function's prototype and static fields.<tr><td><a id="l56"></a><a href="#l56">56</a><td> *<tr><td><a id="l57"></a><a href="#l57">57</a><td> * @param {!Function=} opt_f The function to wrap and record. Defaults to<tr><td><a id="l58"></a><a href="#l58">58</a><td> * {@link goog.nullFunction}.<tr><td><a id="l59"></a><a href="#l59">59</a><td> * @return {!Function} The wrapped function.<tr><td><a id="l60"></a><a href="#l60">60</a><td> */<tr><td><a id="l61"></a><a href="#l61">61</a><td>goog.testing.recordFunction = function(opt_f) {<tr><td><a id="l62"></a><a href="#l62">62</a><td> var f = opt_f || goog.nullFunction;<tr><td><a id="l63"></a><a href="#l63">63</a><td> var calls = [];<tr><td><a id="l64"></a><a href="#l64">64</a><td><tr><td><a id="l65"></a><a href="#l65">65</a><td> function recordedFunction() {<tr><td><a id="l66"></a><a href="#l66">66</a><td> try {<tr><td><a id="l67"></a><a href="#l67">67</a><td> var ret = f.apply(this, arguments);<tr><td><a id="l68"></a><a href="#l68">68</a><td> calls.push(new goog.testing.FunctionCall(f, this, arguments, ret, null));<tr><td><a id="l69"></a><a href="#l69">69</a><td> return ret;<tr><td><a id="l70"></a><a href="#l70">70</a><td> } catch (err) {<tr><td><a id="l71"></a><a href="#l71">71</a><td> calls.push(new goog.testing.FunctionCall(f, this, arguments, undefined,<tr><td><a id="l72"></a><a href="#l72">72</a><td> err));<tr><td><a id="l73"></a><a href="#l73">73</a><td> throw err;<tr><td><a id="l74"></a><a href="#l74">74</a><td> }<tr><td><a id="l75"></a><a href="#l75">75</a><td> }<tr><td><a id="l76"></a><a href="#l76">76</a><td><tr><td><a id="l77"></a><a href="#l77">77</a><td> /**<tr><td><a id="l78"></a><a href="#l78">78</a><td> * @return {number} Total number of calls.<tr><td><a id="l79"></a><a href="#l79">79</a><td> */<tr><td><a id="l80"></a><a href="#l80">80</a><td> recordedFunction.getCallCount = function() {<tr><td><a id="l81"></a><a href="#l81">81</a><td> return calls.length;<tr><td><a id="l82"></a><a href="#l82">82</a><td> };<tr><td><a id="l83"></a><a href="#l83">83</a><td><tr><td><a id="l84"></a><a href="#l84">84</a><td> /**<tr><td><a id="l85"></a><a href="#l85">85</a><td> * Asserts that the function was called {@code expected} times.<tr><td><a id="l86"></a><a href="#l86">86</a><td> * @param {number} expected The expected number of calls.<tr><td><a id="l87"></a><a href="#l87">87</a><td> */<tr><td><a id="l88"></a><a href="#l88">88</a><td> recordedFunction.assertCallCount = function(expected) {<tr><td><a id="l89"></a><a href="#l89">89</a><td> var actual = calls.length;<tr><td><a id="l90"></a><a href="#l90">90</a><td> assertEquals(<tr><td><a id="l91"></a><a href="#l91">91</a><td> 'Expected ' + expected + ' call(s), but was ' + actual + '.',<tr><td><a id="l92"></a><a href="#l92">92</a><td> expected, actual);<tr><td><a id="l93"></a><a href="#l93">93</a><td> };<tr><td><a id="l94"></a><a href="#l94">94</a><td><tr><td><a id="l95"></a><a href="#l95">95</a><td> /**<tr><td><a id="l96"></a><a href="#l96">96</a><td> * @return {!Array<!goog.testing.FunctionCall>} All calls of the recorded<tr><td><a id="l97"></a><a href="#l97">97</a><td> * function.<tr><td><a id="l98"></a><a href="#l98">98</a><td> */<tr><td><a id="l99"></a><a href="#l99">99</a><td> recordedFunction.getCalls = function() {<tr><td><a id="l100"></a><a href="#l100">100</a><td> return calls;<tr><td><a id="l101"></a><a href="#l101">101</a><td> };<tr><td><a id="l102"></a><a href="#l102">102</a><td><tr><td><a id="l103"></a><a href="#l103">103</a><td><tr><td><a id="l104"></a><a href="#l104">104</a><td> /**<tr><td><a id="l105"></a><a href="#l105">105</a><td> * @return {goog.testing.FunctionCall} Last call of the recorded function or<tr><td><a id="l106"></a><a href="#l106">106</a><td> * null if it hasn't been called.<tr><td><a id="l107"></a><a href="#l107">107</a><td> */<tr><td><a id="l108"></a><a href="#l108">108</a><td> recordedFunction.getLastCall = function() {<tr><td><a id="l109"></a><a href="#l109">109</a><td> return calls[calls.length - 1] || null;<tr><td><a id="l110"></a><a href="#l110">110</a><td> };<tr><td><a id="l111"></a><a href="#l111">111</a><td><tr><td><a id="l112"></a><a href="#l112">112</a><td> /**<tr><td><a id="l113"></a><a href="#l113">113</a><td> * Returns and removes the last call of the recorded function.<tr><td><a id="l114"></a><a href="#l114">114</a><td> * @return {goog.testing.FunctionCall} Last call of the recorded function or<tr><td><a id="l115"></a><a href="#l115">115</a><td> * null if it hasn't been called.<tr><td><a id="l116"></a><a href="#l116">116</a><td> */<tr><td><a id="l117"></a><a href="#l117">117</a><td> recordedFunction.popLastCall = function() {<tr><td><a id="l118"></a><a href="#l118">118</a><td> return calls.pop() || null;<tr><td><a id="l119"></a><a href="#l119">119</a><td> };<tr><td><a id="l120"></a><a href="#l120">120</a><td><tr><td><a id="l121"></a><a href="#l121">121</a><td> /**<tr><td><a id="l122"></a><a href="#l122">122</a><td> * Resets the recorded function and removes all calls.<tr><td><a id="l123"></a><a href="#l123">123</a><td> */<tr><td><a id="l124"></a><a href="#l124">124</a><td> recordedFunction.reset = function() {<tr><td><a id="l125"></a><a href="#l125">125</a><td> calls.length = 0;<tr><td><a id="l126"></a><a href="#l126">126</a><td> };<tr><td><a id="l127"></a><a href="#l127">127</a><td><tr><td><a id="l128"></a><a href="#l128">128</a><td> return recordedFunction;<tr><td><a id="l129"></a><a href="#l129">129</a><td>};<tr><td><a id="l130"></a><a href="#l130">130</a><td><tr><td><a id="l131"></a><a href="#l131">131</a><td><tr><td><a id="l132"></a><a href="#l132">132</a><td>/**<tr><td><a id="l133"></a><a href="#l133">133</a><td> * Same as {@link goog.testing.recordFunction} but the recorded function will<tr><td><a id="l134"></a><a href="#l134">134</a><td> * have the same prototype and static fields as the original one. It can be<tr><td><a id="l135"></a><a href="#l135">135</a><td> * used with constructors.<tr><td><a id="l136"></a><a href="#l136">136</a><td> *<tr><td><a id="l137"></a><a href="#l137">137</a><td> * @param {!Function} ctor The function to wrap and record.<tr><td><a id="l138"></a><a href="#l138">138</a><td> * @return {!Function} The wrapped function.<tr><td><a id="l139"></a><a href="#l139">139</a><td> */<tr><td><a id="l140"></a><a href="#l140">140</a><td>goog.testing.recordConstructor = function(ctor) {<tr><td><a id="l141"></a><a href="#l141">141</a><td> var recordedConstructor = goog.testing.recordFunction(ctor);<tr><td><a id="l142"></a><a href="#l142">142</a><td> recordedConstructor.prototype = ctor.prototype;<tr><td><a id="l143"></a><a href="#l143">143</a><td> goog.mixin(recordedConstructor, ctor);<tr><td><a id="l144"></a><a href="#l144">144</a><td> return recordedConstructor;<tr><td><a id="l145"></a><a href="#l145">145</a><td>};<tr><td><a id="l146"></a><a href="#l146">146</a><td><tr><td><a id="l147"></a><a href="#l147">147</a><td><tr><td><a id="l148"></a><a href="#l148">148</a><td><tr><td><a id="l149"></a><a href="#l149">149</a><td>/**<tr><td><a id="l150"></a><a href="#l150">150</a><td> * Struct for a single function call.<tr><td><a id="l151"></a><a href="#l151">151</a><td> * @param {!Function} func The called function.<tr><td><a id="l152"></a><a href="#l152">152</a><td> * @param {!Object} thisContext {@code this} context of called function.<tr><td><a id="l153"></a><a href="#l153">153</a><td> * @param {!Arguments} args Arguments of the called function.<tr><td><a id="l154"></a><a href="#l154">154</a><td> * @param {*} ret Return value of the function or undefined in case of error.<tr><td><a id="l155"></a><a href="#l155">155</a><td> * @param {*} error The error thrown by the function or null if none.<tr><td><a id="l156"></a><a href="#l156">156</a><td> * @constructor<tr><td><a id="l157"></a><a href="#l157">157</a><td> */<tr><td><a id="l158"></a><a href="#l158">158</a><td>goog.testing.FunctionCall = function(func, thisContext, args, ret, error) {<tr><td><a id="l159"></a><a href="#l159">159</a><td> this.function_ = func;<tr><td><a id="l160"></a><a href="#l160">160</a><td> this.thisContext_ = thisContext;<tr><td><a id="l161"></a><a href="#l161">161</a><td> this.arguments_ = Array.prototype.slice.call(args);<tr><td><a id="l162"></a><a href="#l162">162</a><td> this.returnValue_ = ret;<tr><td><a id="l163"></a><a href="#l163">163</a><td> this.error_ = error;<tr><td><a id="l164"></a><a href="#l164">164</a><td>};<tr><td><a id="l165"></a><a href="#l165">165</a><td><tr><td><a id="l166"></a><a href="#l166">166</a><td><tr><td><a id="l167"></a><a href="#l167">167</a><td>/**<tr><td><a id="l168"></a><a href="#l168">168</a><td> * @return {!Function} The called function.<tr><td><a id="l169"></a><a href="#l169">169</a><td> */<tr><td><a id="l170"></a><a href="#l170">170</a><td>goog.testing.FunctionCall.prototype.getFunction = function() {<tr><td><a id="l171"></a><a href="#l171">171</a><td> return this.function_;<tr><td><a id="l172"></a><a href="#l172">172</a><td>};<tr><td><a id="l173"></a><a href="#l173">173</a><td><tr><td><a id="l174"></a><a href="#l174">174</a><td><tr><td><a id="l175"></a><a href="#l175">175</a><td>/**<tr><td><a id="l176"></a><a href="#l176">176</a><td> * @return {!Object} {@code this} context of called function. It is the same as<tr><td><a id="l177"></a><a href="#l177">177</a><td> * the created object if the function is a constructor.<tr><td><a id="l178"></a><a href="#l178">178</a><td> */<tr><td><a id="l179"></a><a href="#l179">179</a><td>goog.testing.FunctionCall.prototype.getThis = function() {<tr><td><a id="l180"></a><a href="#l180">180</a><td> return this.thisContext_;<tr><td><a id="l181"></a><a href="#l181">181</a><td>};<tr><td><a id="l182"></a><a href="#l182">182</a><td><tr><td><a id="l183"></a><a href="#l183">183</a><td><tr><td><a id="l184"></a><a href="#l184">184</a><td>/**<tr><td><a id="l185"></a><a href="#l185">185</a><td> * @return {!Array<?>} Arguments of the called function.<tr><td><a id="l186"></a><a href="#l186">186</a><td> */<tr><td><a id="l187"></a><a href="#l187">187</a><td>goog.testing.FunctionCall.prototype.getArguments = function() {<tr><td><a id="l188"></a><a href="#l188">188</a><td> return this.arguments_;<tr><td><a id="l189"></a><a href="#l189">189</a><td>};<tr><td><a id="l190"></a><a href="#l190">190</a><td><tr><td><a id="l191"></a><a href="#l191">191</a><td><tr><td><a id="l192"></a><a href="#l192">192</a><td>/**<tr><td><a id="l193"></a><a href="#l193">193</a><td> * Returns the nth argument of the called function.<tr><td><a id="l194"></a><a href="#l194">194</a><td> * @param {number} index 0-based index of the argument.<tr><td><a id="l195"></a><a href="#l195">195</a><td> * @return {*} The argument value or undefined if there is no such argument.<tr><td><a id="l196"></a><a href="#l196">196</a><td> */<tr><td><a id="l197"></a><a href="#l197">197</a><td>goog.testing.FunctionCall.prototype.getArgument = function(index) {<tr><td><a id="l198"></a><a href="#l198">198</a><td> return this.arguments_[index];<tr><td><a id="l199"></a><a href="#l199">199</a><td>};<tr><td><a id="l200"></a><a href="#l200">200</a><td><tr><td><a id="l201"></a><a href="#l201">201</a><td><tr><td><a id="l202"></a><a href="#l202">202</a><td>/**<tr><td><a id="l203"></a><a href="#l203">203</a><td> * @return {*} Return value of the function or undefined in case of error.<tr><td><a id="l204"></a><a href="#l204">204</a><td> */<tr><td><a id="l205"></a><a href="#l205">205</a><td>goog.testing.FunctionCall.prototype.getReturnValue = function() {<tr><td><a id="l206"></a><a href="#l206">206</a><td> return this.returnValue_;<tr><td><a id="l207"></a><a href="#l207">207</a><td>};<tr><td><a id="l208"></a><a href="#l208">208</a><td><tr><td><a id="l209"></a><a href="#l209">209</a><td><tr><td><a id="l210"></a><a href="#l210">210</a><td>/**<tr><td><a id="l211"></a><a href="#l211">211</a><td> * @return {*} The error thrown by the function or null if none.<tr><td><a id="l212"></a><a href="#l212">212</a><td> */<tr><td><a id="l213"></a><a href="#l213">213</a><td>goog.testing.FunctionCall.prototype.getError = function() {<tr><td><a id="l214"></a><a href="#l214">214</a><td> return this.error_;<tr><td><a id="l215"></a><a href="#l215">215</a><td>};</table></div></article><nav><h3><a href="../../../../index.html" tabindex="2">Overview</a></h3><div><input type="checkbox" id="nav-modules" checked/><label for="nav-modules"><h3><span class="selectable" tabindex="2">Modules</span></h3></label><div id="nav-modules-view"></div></div><div><input type="checkbox" id="nav-types" checked/><label for="nav-types"><h3><span class="selectable" tabindex="2">Types</span></h3></label><div id="nav-types-view"></div></div><h3><a href="../../../../Changes.html" tabindex="2">Changes</a></h3></nav></main><footer><div><a href="https://github.com/jleyba/js-dossier">Generated by dossier</a></div></footer><script src="../../../../types.js"></script><script src="../../../../dossier.js"></script>