public function testPrevPage()
 {
     $login = new Login($this);
     $login->setUsername(PHPUNIT_TESTSUITE_EXTENSION_SELENIUM_LOGIN)->setPassword(PHPUNIT_TESTSUITE_EXTENSION_SELENIUM_PASS)->submit();
     $users = new Users($this);
     $userData = $users->getRandomEntity();
     $this->assertTrue($users->entityExists($userData));
     $users->nextPage();
     $this->assertFalse($users->entityExists($userData));
     $users->previousPage();
     $this->assertTrue($users->entityExists($userData));
 }