Phpunit Test -Can't find entity (Symfony) - symfony

Question

I am new to symfony and phpunit testing and have been getting this error
Cannot stub or mock class or interface "com\twcl\agripayrollBundle\Entity\Payrollperiod" which does not exist
This is my test which is in the Selenium Test files in the Tests directory.
use com\twcl\agripayrollBundle\Mapping\PayPeriodManager;
use com\twcl\agripayrollBundle\Entity\Payrollperiod;
use Doctrine\ORM\EntityRepository;
use Doctrine\Common\Persistence\ObjectManager;
class PayrollperiodManagerTest extends PHPUnit_Framework_TestCase {public function testPayrollPeriodManager()
{
$payperiod= $this->createMock(Payrollperiod::class);
$payperiod->expects($this->once())
->method('setstartDate')
->will($this->setValue(2011-01-01));
$payperiod->expects($this->once())
->method('setendDate')
->will($this->setValue(2011-01-18));
$payperiod->expects($this->once())
->method('setState')
->will($this->setValue('Active'));
var_dump($payperiod);
die();
}
}
This is my phpunit.xml.dist
<!-- http://phpunit.de/manual/4.1/en/appendixes.configuration.html -->
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
backupGlobals="false"
colors="true"
bootstrap="bootstrap.php.cache"
>
<testsuites>
<testsuite name="Project Test Suite">
<directory>../src/*/*Bundle/Tests</directory>
<directory>../src/*/Bundle/*Bundle/Tests</directory>
</testsuite>
</testsuites>
<!--
<php>
<server name="KERNEL_DIR" value="/path/to/your/app/" />
</php>
-->
<filter>
<whitelist>
<directory>../src</directory>
<exclude>
<directory>../src/*/*Bundle/Resources</directory>
<directory>../src/*/*Bundle/Tests</directory>
<directory>../src/*/Bundle/*Bundle/Resources</directory>
<directory>../src/*/Bundle/*Bundle/Tests</directory>
</exclude>
</whitelist>
</filter>
</phpunit>
My autoloader
<?php
use Doctrine\Common\Annotations\AnnotationRegistry;
use Composer\Autoload\ClassLoader;
/**
* #var ClassLoader $loader
*/
$loader = require __DIR__.'/../vendor/autoload.php';
AnnotationRegistry::registerLoader(array($loader, 'loadClass'));
return $loader;