public function testHttpPasswordIsOptional() {
$bag = new ServerBag(array(
'PHP_AUTH_USER' => 'foo',
));
$this
->assertEquals(array(
'AUTHORIZATION' => 'Basic ' . base64_encode('foo:'),
'PHP_AUTH_USER' => 'foo',
'PHP_AUTH_PW' => '',
), $bag
->getHeaders());
}