/**
* @covers ::__construct
* @covers ::set
* @covers ::isEmpty
* @covers ::clear
*/
public function testEmpty()
{
$collection = new DataCollection();
$this->assertTrue($collection->isEmpty());
$collection->set('test', true);
$this->assertFalse($collection->isEmpty());
$collection->clear();
$this->assertTrue($collection->isEmpty());
}
/**
* Add header.
*
* @param string $key
* @param mixed $value
* @return Response
*/
public function header($key, $value)
{
$this->headers->set($key, $value);
return $this;
}
