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POPHPUnit - Asserting that a query returns the good data from a database
 

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    <p>I'm testing a Factory that simply retrieves all the "post" of a news system. I'll cut the example to something as simple as possible:</p> <pre><code>$newsFactory-&gt;getAllNews(); </code></pre> <p>The table looks like this:</p> <pre><code>+---------+---------------------+-------------+ | news_id | news_publishedDate | news_active | +---------+---------------------+-------------+ | 1 | 2010-03-22 13:20:22 | 1 | | 2 | 2010-03-23 13:20:22 | 1 | | 14 | 2010-03-23 13:20:22 | 0 | | 15 | 2010-03-23 13:20:22 | 1 | +---------+---------------------+-------------+ </code></pre> <p>I want to test that behaviour; for now, we'll focus only on the first one:</p> <ul> <li>Make sure the query will return only news_active=1</li> <li>Make sure the query will return the element ordered by news_publishedDate, from newest to older.</li> </ul> <p>So I've made an <code>dbData.xml</code> dataset of what I consider as good testing data:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" ?&gt; &lt;dataset&gt; &lt;table name="news"&gt; &lt;column&gt;news_id&lt;/column&gt; &lt;column&gt;news_publishedDate&lt;/column&gt; &lt;column&gt;news_active&lt;/column&gt; &lt;row&gt; &lt;value&gt;1&lt;/value&gt; &lt;value&gt;2010-03-20 08:55:05&lt;/value&gt; &lt;value&gt;1&lt;/value&gt; &lt;/row&gt; &lt;row&gt; &lt;value&gt;2&lt;/value&gt; &lt;value&gt;2010-03-20 08:55:05&lt;/value&gt; &lt;value&gt;0&lt;/value&gt; &lt;/row&gt; &lt;row&gt; &lt;value&gt;3&lt;/value&gt; &lt;value&gt;2011-03-20 08:55:05&lt;/value&gt; &lt;value&gt;1&lt;/value&gt; &lt;/row&gt; &lt;/table&gt; &lt;/dataset&gt; </code></pre> <p>Ok, so let's just check the first test (not returning the <code>news_id</code> #2 from the XML data set)</p> <p>I must extend the <code>PHPUnit_Extensions_Database_TestCase</code> class to make my NewsFactoryTest class:</p> <pre><code>&lt;?php require_once 'PHPUnit/Extensions/Database/TestCase.php'; class NewsFactoryTest extends PHPUnit_Extensions_Database_TestCase { protected $db; protected function getConnection() { $this-&gt;db = new PDO('mysql:host=localhost;dbname=testdb', 'root', ''); return $this-&gt;createDefaultDBConnection($this-&gt;db, 'testdb'); } protected function getDataSet() { return $this-&gt;createXMLDataSet(dir(__FILE__) . DIRECTORY_SEPARATOR . 'dbData.xml'); } public function testGetNewsById() { $newsFactory = new NewsFactory($this-&gt;db); $news = $newsFactory-&gt;getNewsById(); // ??? $this-&gt;assertEquals(2, count($news), "Should return only 2 results"); } } </code></pre> <p>My main question would be <em>how do I setup that test ?</em></p> <p>In details, I try to understand:</p> <ul> <li>Should I create a testdb database or is that all emulated/virtual ? <ul> <li>I've seen many examples using <code>sqlite::memory:</code>, is it a good idea to test MySQL based query with sqlite? Can I use <code>mysql::memory:</code> instead ?</li> <li>If it's a real DB, how do I restore all the data from <code>dbData.xml</code> in the DB before each test run ?</li> </ul></li> <li>Where am I supposed to call <code>getConnection()</code> and <code>getDataSet()</code>?</li> </ul> <p>Thanks for reading &amp; sharing your knowledge!</p>
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