Symfony\Component\HttpKernel\DataCollector\DumpDataCollector::serialize PHP Method

    public function serialize()
    {
        if ($this->clonesCount !== $this->clonesIndex) {
            return 'a:0:{}';
        }
        $ser = serialize($this->data);
        $this->data = array();
        $this->dataCount = 0;
        $this->isCollected = true;
        return $ser;
    }

 public function testDump()
 {
     $data = new Data(array(array(123)));
     $collector = new DumpDataCollector();
     $this->assertSame('dump', $collector->getName());
     $collector->dump($data);
     $line = __LINE__;
     $this->assertSame(1, $collector->getDumpsCount());
     $dump = $collector->getDumps('html');
     $this->assertTrue(isset($dump[0]['data']));
     $dump[0]['data'] = preg_replace('/^.*?<pre/', '<pre', $dump[0]['data']);
     $xDump = array(array('data' => "<pre class=sf-dump><span class=sf-dump-num>123</span>\n</pre><script>Sfdump.instrument()</script>\n", 'name' => 'DumpDataCollectorTest.php', 'file' => __FILE__, 'line' => $line, 'fileExcerpt' => false));
     $this->assertSame($xDump, $dump);
     $this->assertStringStartsWith('a:1:{i:0;a:5:{s:4:"data";O:39:"Symfony\\Component\\VarDumper\\Cloner\\Data":3:{s:45:"Symfony\\Component\\VarDumper\\Cloner\\Datadata";a:1:{i:0;a:1:{i:0;i:123;}}s:49:"Symfony\\Component\\VarDumper\\Cloner\\DatamaxDepth";i:-1;s:57:"Symfony\\Component\\VarDumper\\Cloner\\DatamaxItemsPerDepth";i:-1;}s:4:"name";s:25:"DumpDataCollectorTest.php";s:4:"file";s:', str_replace("", '', $collector->serialize()));
     $this->assertSame(0, $collector->getDumpsCount());
     $this->assertSame('a:0:{}', $collector->serialize());
 }