Abstract Selenium Test Case - checking for Internal Server Error pages

abstract.php

<?php

class AbstractTestCase extends PHPUnit_Extensions_Selenium2TestCase
{
	/**
	 * Check for internal server errors and reload the page upto 3 times
	 */
	protected function checkInternalServerError()
	{
		$url = $this->url();

		$i = 0;
		while ($this->check500Error() and $i++ < 3)
		{
			$cliOutput = "500 error detected. Retrying attempt " . $i;
			fwrite(STDOUT, PHP_EOL . $cliOutput . PHP_EOL);
			$this->url($url);
		}
	}

	/**
	 * Check 500 type error (internal server error)
	 *
	 * @return bool
	 */
	protected function check500Error()
	{
		try
		{
			// Check for Internal server error header
			$errorHeader = $this->byCssSelector('h1');
			return $errorHeader and $errorHeader->text() === 'Internal Server Error';
		}
		catch(Exception $e)
		{
			return false;
		}
	}
}