/**
*
* @return void
*/
public function testHeaders()
{
$message1 = $this->messageMock->withHeader('test', 'test');
// Check if withHeader returnes new instance
$this->assertNotSame($message1, $this->messageMock);
$this->assertTrue($message1->hasHeader('test'));
$this->assertFalse($this->messageMock->hasHeader('test'));
$this->assertEquals(array('test'), $message1->getHeader('test'));
// Test if adding the same header value again, the same object is returned
$message2 = $message1->withHeader('test', 'test');
$this->assertSame($message1, $message2);
$message3 = $message1->withAddedHeader('test', 'test2');
// Check if withAddedHeader returnes new instance
$this->assertNotSame($message1, $message3);
// Test values of header
$this->assertEquals(array('test', 'test2'), $message3->getHeader('test'));
$this->assertEquals('test,test2', $message3->getHeaderLine('test'));
$this->assertEquals(array('test' => array('test', 'test2')), $message3->getHeaders());
$message4 = $message3->withoutHeader('test');
$this->assertNotSame($message4, $message3);
}
