# -*- coding; utf-8 -*-
"""
test_head_request
~~~~~~~~~~~~~~~~~
"""
import h2.connection
import pytest


class TestHeadRequest(object):

        example_request_headers = [
            (b':authority', b'example.com'),
            (b':path', b'/'),
            (b':scheme', b'https'),
            (b':method', b'HEAD'),
        ]

        example_response_headers = [
            (b':status', b'200'),
            (b'server', b'fake-serv/0.1.0'),
            (b'content_length', b'1'),
        ]

        def test_non_zero_content_and_no_body(self, frame_factory):

            c = h2.connection.H2Connection()
            c.initiate_connection()
            c.send_headers(1, self.example_request_headers, end_stream=True)

            f = frame_factory.build_headers_frame(
                self.example_response_headers,
                flags=['END_STREAM']
            )
            events = c.receive_data(f.serialize())

            assert len(events) == 2
            event = events[0]

            assert isinstance(event, h2.events.ResponseReceived)
            assert event.stream_id == 1
            assert event.headers == self.example_response_headers

        def test_reject_non_zero_content_and_body(self, frame_factory):
            c = h2.connection.H2Connection()
            c.initiate_connection()
            c.send_headers(1, self.example_request_headers)

            headers = frame_factory.build_headers_frame(
                self.example_response_headers
            )
            data = frame_factory.build_data_frame(data=b'\x01')

            c.receive_data(headers.serialize())
            with pytest.raises(h2.exceptions.InvalidBodyLengthError):
                c.receive_data(data.serialize())