phpunit slow tests

phpunit.xml

<phpunit>
  <listeners>
    <listener class="TestTimesListener" file="TestTimesListener.php" />
  </listeners>
</phpunit>

TestTimesListener.php

<?php

/**
 * source: https://jameshd.wordpress.com/2014/11/12/slow-phpunit-tests/
 */
class TestTimesListener implements PHPUnit_Framework_TestListener
{
    /**
     * Anything above this threshold is deemed slow
     * @var float $seconds
     */
    const MAX_EXECUTION_TIME = 0.2;

    /**
     * Absolute max time we should allow a unit test to run.
     * @var float $seconds
     */
    const FAIL_IF_LONGER_THAN = 20.0;

    /**
     * Helper variables for assinting with naming
     * @var string
     */
    protected $currentSuite;
    protected $fullTestName;

    public function startTest(PHPUnit_Framework_Test $test)
    {
        $this->fullTestName = $this->currentSuite->getName() . "::" . $test->getName();
    }

    public function endTest(PHPUnit_Framework_Test $test, $time)
    {
        if ($time > self::MAX_EXECUTION_TIME) {
            printf(
                PHP_EOL . "%s took %f seconds" . PHP_EOL,
                $this->fullTestName,
                $time
            );

            if ($time >= self::FAIL_IF_LONGER_THAN) {
                $test->fail(
                    sprintf(
                        "%s is too slow, it takes %f seconds",
                        $this->fullTestName,
                        $time
                    )
                );
            }
        }
    }

    public function addError(PHPUnit_Framework_Test $test, Exception $e, $time)
    {
    }

    public function addFailure(PHPUnit_Framework_Test $test, PHPUnit_Framework_AssertionFailedError $e, $time)
    {
    }

    public function addIncompleteTest(PHPUnit_Framework_Test $test, Exception $e, $time)
    {
    }

    public function addSkippedTest(PHPUnit_Framework_Test $test, Exception $e, $time)
    {
    }

    public function startTestSuite(PHPUnit_Framework_TestSuite $suite)
    {
        $this->currentSuite = $suite;
    }

    public function endTestSuite(PHPUnit_Framework_TestSuite $suite)
    {
    }
}