mageekguy\atoum\runner::findTestClasses PHP Method

    protected function findTestClasses($testBaseClass = null)
    {
        $reflectionClassFactory = $this->reflectionClassFactory;
        $testBaseClass = $testBaseClass ?: __NAMESPACE__ . '\\test';
        return array_filter($this->adapter->get_declared_classes(), function ($class) use($reflectionClassFactory, $testBaseClass) {
            $class = $reflectionClassFactory($class);
            return $class->isSubClassOf($testBaseClass) === true && $class->isAbstract() === false;
        });
    }