/**
* @test
*/
public function it_can_get_and_set_headers()
{
$message = new Message('test');
$this->assertSame([], $message->getHeaders());
$this->assertFalse($message->getHeader('foo'));
$message->setHeader('foo', 'bar');
$this->assertSame(['foo' => 'bar'], $message->getHeaders());
$this->assertSame('bar', $message->getHeader('foo'));
}
