public function testFirst()
{
$handler = ArrayPosition::first();
$this->assertEquals(ArrayPosition::FIRST, $handler->position());
$result = $handler->addToArray(array('test1' => 'test', 'test2' => 'test', 'test3' => 'test'), array('first' => 'value'));
$this->assertEquals('value', $result['first']);
$keys = array_keys($result);
$this->assertEquals('first', $keys[0]);
$this->assertEquals('test1', $keys[1]);
$this->assertEquals('test2', $keys[2]);
$this->assertEquals('test3', $keys[3]);
}
