transformtest.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" /><title>TransformTest xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><pre><a name="1" href="#1">1</a> <strong>package</strong> <a href="../../../../org/archive/crawler/util/package-summary.html">org.archive.crawler.util</a>;<a name="2" href="#2">2</a> <a name="3" href="#3">3</a> <strong>import</strong> java.util.ArrayList;<a name="4" href="#4">4</a> <strong>import</strong> java.util.Arrays;<a name="5" href="#5">5</a> <strong>import</strong> java.util.Collection;<a name="6" href="#6">6</a> <strong>import</strong> java.util.HashSet;<a name="7" href="#7">7</a> <strong>import</strong> java.util.List;<a name="8" href="#8">8</a> <strong>import</strong> java.util.Random;<a name="9" href="#9">9</a> <strong>import</strong> java.util.Set;<a name="10" href="#10">10</a> <a name="11" href="#11">11</a> <strong>import</strong> junit.framework.TestCase;<a name="12" href="#12">12</a> <a name="13" href="#13">13</a> <em>/**<em>*</em></em><a name="14" href="#14">14</a> <em> * Tests the {@link dex.misc.Transform} class.</em><a name="15" href="#15">15</a> <em> */</em><a name="16" href="#16">16</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/util/TransformTest.html">TransformTest</a> <strong>extends</strong> TestCase {<a name="17" href="#17">17</a> <a name="18" href="#18">18</a> <em class="comment">// Convert integers to strings, eliminating negative numbers </em><a name="19" href="#19">19</a> <strong>private</strong> <strong>static</strong> <strong>class</strong> PositiveToString <a name="20" href="#20">20</a> implements Transformer<Integer, String> {<a name="21" href="#21">21</a> <strong>public</strong> String transform(Integer i) {<a name="22" href="#22">22</a> <strong>if</strong> (i < 0) {<a name="23" href="#23">23</a> <strong>return</strong> <strong>null</strong>;<a name="24" href="#24">24</a> }<a name="25" href="#25">25</a> <strong>return</strong> i.toString();<a name="26" href="#26">26</a> }<a name="27" href="#27">27</a> }<a name="28" href="#28">28</a> <a name="29" href="#29">29</a> <em>/**<em>*</em></em><a name="30" href="#30">30</a> <em> * Tests using a simple Transformer. The Transformer changes</em><a name="31" href="#31">31</a> <em> * positive integers into strings. The test sets up a </em><a name="32" href="#32">32</a> <em> * list of random integers, remembering which ones are</em><a name="33" href="#33">33</a> <em> * positive. The Transform is created, and the Transform's</em><a name="34" href="#34">34</a> <em> * contents are compared against the list of remembered positive </em><a name="35" href="#35">35</a> <em> * integers.</em><a name="36" href="#36">36</a> <em> */</em><a name="37" href="#37">37</a> <strong>public</strong> <strong>void</strong> testTransform() {<a name="38" href="#38">38</a> Transformer<Integer,String> transformer = <strong>new</strong> PositiveToString();<a name="39" href="#39">39</a> <a name="40" href="#40">40</a> <em class="comment">// Transform of an empty collection should be empty.</em><a name="41" href="#41">41</a> List<Integer> empty = <strong>new</strong> ArrayList<Integer>();<a name="42" href="#42">42</a> assertTrue(<strong>new</strong> Transform<Integer,String>(empty, transformer).isEmpty());<a name="43" href="#43">43</a> <a name="44" href="#44">44</a> <em class="comment">// Some simple test data.</em><a name="45" href="#45">45</a> Integer[] testData = <strong>new</strong> Integer[] { -5, 3, 2, -11, 0, 111, -161 };<a name="46" href="#46">46</a> String[] expected = <strong>new</strong> String[] { <span class="string">"3"</span>, <span class="string">"2"</span>, <span class="string">"0"</span>, <span class="string">"111"</span> };<a name="47" href="#47">47</a> List<Integer> list = Arrays.asList(testData);<a name="48" href="#48">48</a> Transform<Integer,String> c = <strong>new</strong> Transform<Integer,String>(list,<a name="49" href="#49">49</a> transformer);<a name="50" href="#50">50</a> List<String> expectedList = Arrays.asList(expected);<a name="51" href="#51">51</a> assertEquals(<strong>new</strong> ArrayList<String>(c), expectedList);<a name="52" href="#52">52</a> <a name="53" href="#53">53</a> <em class="comment">// Same test as above, with random data</em><a name="54" href="#54">54</a> <strong>for</strong> (<strong>int</strong> i = 0; i < 100; i++) {<a name="55" href="#55">55</a> randomTest();<a name="56" href="#56">56</a> }<a name="57" href="#57">57</a> }<a name="58" href="#58">58</a> <a name="59" href="#59">59</a> <strong>private</strong> <strong>void</strong> randomTest() {<a name="60" href="#60">60</a> Transformer<Integer, String> transformer = <strong>new</strong> PositiveToString();<a name="61" href="#61">61</a> Random random = <strong>new</strong> Random();<a name="62" href="#62">62</a> <strong>int</strong> max = random.nextInt(1024) + 10;<a name="63" href="#63">63</a> List<Integer> testData = <strong>new</strong> ArrayList<Integer>(max);<a name="64" href="#64">64</a> List<String> expected = <strong>new</strong> ArrayList<String>(max);<a name="65" href="#65">65</a> <strong>for</strong> (<strong>int</strong> i = 0; i < max; i++) {<a name="66" href="#66">66</a> <strong>int</strong> e = random.nextInt();<a name="67" href="#67">67</a> testData.add(e);<a name="68" href="#68">68</a> <strong>if</strong> (e >= 0) {<a name="69" href="#69">69</a> expected.add(Integer.toString(e));<a name="70" href="#70">70</a> }<a name="71" href="#71">71</a> }<a name="72" href="#72">72</a> <a name="73" href="#73">73</a> Transform<Integer,String> c = <strong>new</strong> Transform<Integer,String>(testData,<a name="74" href="#74">74</a> transformer);<a name="75" href="#75">75</a> List<String> results = <strong>new</strong> ArrayList<String>(c);<a name="76" href="#76">76</a> assertEquals(expected, results);<a name="77" href="#77">77</a> }<a name="78" href="#78">78</a> <a name="79" href="#79">79</a> <em>/**<em>*</em></em><a name="80" href="#80">80</a> <em> * Tests the static subclasses method. The test sets up a list of</em><a name="81" href="#81">81</a> <em> * Number instances that may contain random Double, Float, Integer</em><a name="82" href="#82">82</a> <em> * or Long values. The Long values are remembered. The subclasses</em><a name="83" href="#83">83</a> <em> * method is used to create a Transform containing only the Long</em><a name="84" href="#84">84</a> <em> * values. The Transform is compared against the list of remembered</em><a name="85" href="#85">85</a> <em> * Long values.</em><a name="86" href="#86">86</a> <em> */</em><a name="87" href="#87">87</a> <strong>public</strong> <strong>void</strong> testSubclasses() {<a name="88" href="#88">88</a> Random random = <strong>new</strong> Random();<a name="89" href="#89">89</a> <strong>for</strong> (<strong>int</strong> i = 0; i < 100; i++) {<a name="90" href="#90">90</a> <strong>int</strong> max = random.nextInt(1024) + 10;<a name="91" href="#91">91</a> List<Number> testData = <strong>new</strong> ArrayList<Number>(max);<a name="92" href="#92">92</a> List<Long> expected = <strong>new</strong> ArrayList<Long>(max);<a name="93" href="#93">93</a> <strong>for</strong> (<strong>int</strong> j = 0; j < max; j++) {<a name="94" href="#94">94</a> <strong>int</strong> v = random.nextInt(4);<a name="95" href="#95">95</a> <strong>switch</strong> (v) {<a name="96" href="#96">96</a> <strong>case</strong> 0:<a name="97" href="#97">97</a> <strong>long</strong> l = random.nextLong();<a name="98" href="#98">98</a> testData.add(l);<a name="99" href="#99">99</a> expected.add(l);<a name="100" href="#100">100</a> <strong>break</strong>;<a name="101" href="#101">101</a> <strong>case</strong> 1:<a name="102" href="#102">102</a> testData.add(random.nextInt());<a name="103" href="#103">103</a> <strong>break</strong>;<a name="104" href="#104">104</a> <strong>case</strong> 2:<a name="105" href="#105">105</a> testData.add(random.nextDouble());<a name="106" href="#106">106</a> <strong>break</strong>;<a name="107" href="#107">107</a> <strong>case</strong> 3:<a name="108" href="#108">108</a> testData.add(random.nextFloat());<a name="109" href="#109">109</a> <strong>break</strong>;<a name="110" href="#110">110</a> }<a name="111" href="#111">111</a> }<a name="112" href="#112">112</a> Collection<Long> c = Transform.sub<strong>class</strong>es(testData, Long.<strong>class</strong>);<a name="113" href="#113">113</a> List<Long> results = <strong>new</strong> ArrayList<Long>(c);<a name="114" href="#114">114</a> assertEquals(expected, results);<a name="115" href="#115">115</a> }<a name="116" href="#116">116</a> }<a name="117" href="#117">117</a> <a name="118" href="#118">118</a> <strong>public</strong> <strong>void</strong> testSingleton() {<a name="119" href="#119">119</a> Set<Number> set = <strong>new</strong> HashSet<Number>();<a name="120" href="#120">120</a> set.add(3);<a name="121" href="#121">121</a> Collection<Integer> c = Transform.sub<strong>class</strong>es(set, Integer.<strong>class</strong>);<a name="122" href="#122">122</a> <strong>for</strong> (Integer i : c) {<a name="123" href="#123">123</a> System.out.println(i);<a name="124" href="#124">124</a> }<a name="125" href="#125">125</a> }<a name="126" href="#126">126</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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