def test_custom_headers(self):
testee = TornadoClient(self.get_url('/echo'))
response = yield testee.send(Request('some_method', 1, [2], {
'3': 4,
'5': True,
'6': None
}),
headers={'foo': 'bar'})
self.assertEqual([1, [2], {'3': 4, '6': None, '5': True}], response)
