public function testIsers($reference, $before, $after, $mask)
{
$reference = new PushReference(self::createFoobarRepository(), $reference, $before, $after);
$this->assertEquals($mask & self::CREATE, $reference->isCreate(), 'Create value is correct.');
$this->assertEquals($mask & self::DELETE, $reference->isDelete(), 'Delete value is correct.');
$this->assertEquals($mask & self::FORCE, $reference->isForce(), 'Force value is correct.');
$this->assertEquals($mask & self::FAST_FORWARD, $reference->isFastForward(), 'FastForward value is correct.');
}