Merge pull request #60 from hackedd/ws-tests

Add test for WebSocket connection.

daphne/tests/test_ws.py

@@ -0,0 +1,91 @@
+# coding: utf8
+from __future__ import unicode_literals
+from unittest import TestCase
+from asgiref.inmemory import ChannelLayer
+from twisted.test import proto_helpers
+
+from ..http_protocol import HTTPFactory
+
+
+class TestWebSocketProtocol(TestCase):
+    """
+    Tests that the HTTP protocol class correctly generates and parses messages.
+    """
+
+    def setUp(self):
+        self.channel_layer = ChannelLayer()
+        self.factory = HTTPFactory(self.channel_layer)
+        self.proto = self.factory.buildProtocol(('127.0.0.1', 0))
+        self.tr = proto_helpers.StringTransport()
+        self.proto.makeConnection(self.tr)
+
+    def test_basic(self):
+        # Send a simple request to the protocol
+        self.proto.dataReceived(
+            b"GET /chat HTTP/1.1\r\n"
+            b"Host: somewhere.com\r\n"
+            b"Upgrade: websocket\r\n"
+            b"Connection: Upgrade\r\n"
+            b"Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==\r\n"
+            b"Sec-WebSocket-Protocol: chat, superchat\r\n"
+            b"Sec-WebSocket-Version: 13\r\n"
+            b"Origin: http://example.com\r\n"
+            b"\r\n"
+        )
+        # Get the resulting message off of the channel layer
+        _, message = self.channel_layer.receive_many(["websocket.connect"])
+        self.assertEqual(message['path'], "/chat")
+        self.assertEqual(message['query_string'], "")
+        self.assertEqual(
+            sorted(message['headers']),
+            [(b'connection', b'Upgrade'),
+             (b'host', b'somewhere.com'),
+             (b'origin', b'http://example.com'),
+             (b'sec-websocket-key', b'x3JJHMbDL1EzLkh9GBhXDw=='),
+             (b'sec-websocket-protocol', b'chat, superchat'),
+             (b'sec-websocket-version', b'13'),
+             (b'upgrade', b'websocket')]
+        )
+        self.assertTrue(message['reply_channel'].startswith("websocket.send!"))
+
+        # Accept the connection
+        self.factory.dispatch_reply(
+            message['reply_channel'],
+            {'accept': True}
+        )
+
+        # Make sure that we get a 101 Switching Protocols back
+        response = self.tr.value()
+        self.assertIn(b"HTTP/1.1 101 Switching Protocols\r\n", response)
+        self.assertIn(b"Sec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk=\r\n", response)
+        self.tr.clear()
+
+        # Send some text
+        self.factory.dispatch_reply(
+            message['reply_channel'],
+            {'text': "Hello World!"}
+        )
+
+        response = self.tr.value()
+        self.assertEqual(response, b"\x81\x0cHello World!")
+        self.tr.clear()
+
+        # Send some bytes
+        self.factory.dispatch_reply(
+            message['reply_channel'],
+            {'bytes': b"\xaa\xbb\xcc\xdd"}
+        )
+
+        response = self.tr.value()
+        self.assertEqual(response, b"\x82\x04\xaa\xbb\xcc\xdd")
+        self.tr.clear()
+
+        # Close the connection
+        self.factory.dispatch_reply(
+            message['reply_channel'],
+            {'close': True}
+        )
+
+        response = self.tr.value()
+        self.assertEqual(response, b"\x88\x02\x03\xe8")
+        self.tr.clear()