public function testSetHeadersOverwritesAllHeaders()
{
$h = new puzzle_message_Request('GET', 'http://foo.com');
$h->setHeader('foo', 'bar');
$h->setHeaders(array('foo' => 'a', 'boo' => 'b'));
$this->assertEquals(array('foo' => array('a'), 'boo' => array('b')), $h->getHeaders());
}