Test test_writer_bad_message fails with ujson

[jelly]

====================================== FAILURES ======================================
______________________________ test_writer_bad_message _______________________________

wfile = <_io.BytesIO object at 0x7f76043e6d60>
writer = <pylsp_jsonrpc.streams.JsonRpcStreamWriter object at 0x7f760392a8e0>

    def test_writer_bad_message(wfile, writer):
        # A datetime isn't serializable(or poorly serializable),
        # ensure the write method doesn't throw, but the result could be empty
        # or the correct datetime
        datetime.datetime = JsonDatetime
        writer.write(datetime.datetime(
            year=2019,
            month=1,
            day=1,
            hour=1,
            minute=1,
            second=1,
        ))

>       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',
            b'Content-Length: 10\r\n'
            b'Content-Type: application/vscode-jsonrpc; charset=utf8\r\n'
            b'\r\n'
            b'1546322461'
        ]
E       AssertionError: assert b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546300861' in [b'', b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546304461', b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546322461']
E        +  where b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546300861' = <built-in method getvalue of _io.BytesIO object at 0x7f76043e6d60>()
E        +    where <built-in method getvalue of _io.BytesIO object at 0x7f76043e6d60> = <_io.BytesIO object at 0x7f76043e6d60>.getvalue

test/test_streams.py:118: AssertionError
============================== short test summary info ===============================
FAILED test/test_streams.py::test_writer_bad_message - AssertionError: assert b'Con...
============================ 1 failed, 26 passed in 0.10s ============================

[papoteur-mga]

I still get the same error with the 1.1.1 release.

[lcheylus]

Same error with release 1.1.2 on OpenBSD with Python 3.10 and ujson-5.8.0

===>  Regression tests for py3-python-lsp-jsonrpc-1.1.2
============================= test session starts ==============================
platform openbsd7 -- Python 3.10.13, pytest-7.1.3, pluggy-1.2.0
rootdir: /usr/obj/ports/py-python-lsp-jsonrpc-1.1.2-python3/python-lsp-jsonrpc-1.1.2, configfile: pyproject.toml, testpaths: test
plugins: mock-3.10.0, cov-4.0.0
collected 27 items

test/test_endpoint.py ......................                             [ 81%]
test/test_streams.py ....F                                               [100%]

=================================== FAILURES ===================================
___________________________ test_writer_bad_message ____________________________

wfile = <_io.BytesIO object at 0xe55f47a36a0>
writer = <pylsp_jsonrpc.streams.JsonRpcStreamWriter object at 0xe55f475a350>

    def test_writer_bad_message(wfile, writer):
        # A datetime isn't serializable(or poorly serializable),
        # ensure the write method doesn't throw, but the result could be empty
        # or the correct datetime
        datetime.datetime = JsonDatetime
        writer.write(datetime.datetime(
            year=2019,
            month=1,
            day=1,
            hour=1,
            minute=1,
            second=1,
        ))

>       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',
            b'Content-Length: 10\r\n'
            b'Content-Type: application/vscode-jsonrpc; charset=utf8\r\n'
            b'\r\n'
            b'1546322461'
        ]
E       AssertionError: assert b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546300861' in [b'', b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546304461', b'Content-Length: 10\r\nContent-Type:
 application/vscode-jsonrpc; charset=utf8\r\n\r\n1546322461']
E        +  where b'Content-Length: 10\r\nContent-Type: application/vscode-jsonrpc; charset=utf8\r\n\r\n1546300861' = <built-in method getvalue of _io.BytesIO object at 0xe55f47a36a0>()
E        +    where <built-in method getvalue of _io.BytesIO object at 0xe55f47a36a0> = <_io.BytesIO object at 0xe55f47a36a0>.getvalue

test/test_streams.py:125: AssertionError
- generated xml file: /usr/obj/ports/py-python-lsp-jsonrpc-1.1.2-python3/python-lsp-jsonrpc-1.1.2/pytest.xml -
- (...)
- =========================== short test summary info ============================
FAILED test/test_streams.py::test_writer_bad_message - AssertionError: assert...
========================= 1 failed, 26 passed in 0.52s =========================
- ```