Python 3.8 fixes for endpoint and tests (#37)

* fix endpoint exception lists for Python 3.8
Author: @maximbaz according to #33

* fix test_writer_bad_message
not only windows can have problems with serializing datetime

Co-authored-by: Carlos Cordoba <ccordoba12@gmail.com>
Co-authored-by: Marko Bakovic <delta003@users.noreply.github.com>

Author: 3 people

pyls_jsonrpc/endpoint.py

@@ -236,6 +236,7 @@ def _handle_response(self, msg_id, result=None, error=None):
         if error is not None:
             log.debug("Received error response to message %s: %s", msg_id, error)
             request_future.set_exception(JsonRpcException.from_dict(error))
+            return
 
         log.debug("Received result for message %s: %s", msg_id, result)
         request_future.set_result(result)

test/test_endpoint.py

@@ -115,9 +115,9 @@ def test_request_cancel(endpoint, consumer):
         'params': {'id': MSG_ID}
     })
 
-    with pytest.raises(exceptions.JsonRpcException) as exc_info:
+    with pytest.raises((exceptions.JsonRpcException, futures.CancelledError)) as exc_info:
         assert future.result(timeout=2)
-    assert exc_info.type == exceptions.JsonRpcRequestCancelled
+    assert exc_info.type in (exceptions.JsonRpcRequestCancelled, futures.CancelledError)
 
 
 def test_consume_notification(endpoint, dispatcher):

test/test_streams.py

@@ -97,7 +97,8 @@ def test_writer(wfile, writer):
 
 def test_writer_bad_message(wfile, writer):
     # A datetime isn't serializable(or poorly serializable),
-    # ensure the write method doesn't throw
+    # ensure the write method doesn't throw, but the result could be empty
+    # or the correct datetime
     import datetime
     writer.write(datetime.datetime(
         year=2019,
@@ -108,12 +109,10 @@ def test_writer_bad_message(wfile, writer):
         second=1,
     ))
 
-    if os.name == 'nt':
-        assert wfile.getvalue() == b''
-    else:
-        assert wfile.getvalue() == (
-            b'Content-Length: 10\r\n'
-            b'Content-Type: application/vscode-jsonrpc; charset=utf8\r\n'
-            b'\r\n'
-            b'1546304461'
-        )
+    assert wfile.getvalue() in [
+        b'',
+        b'Content-Length: 10\r\n'
+        b'Content-Type: application/vscode-jsonrpc; charset=utf8\r\n'
+        b'\r\n'
+        b'1546304461'
+    ]