Test failures in presence of httptools

[mgorny]

When httptools package is installed (as an optional dependency of uvicorn), a part of the test suite fails:

$ pip install -q -r requirements.txt
$ pip install -q httptools
$ pytest tests/test_main.py 
========================================================= test session starts =========================================================
platform linux -- Python 3.12.7, pytest-8.3.3, pluggy-1.5.0
rootdir: /tmp/httpx
configfile: pyproject.toml
plugins: anyio-4.6.2.post1
collected 11 items                                                                                                                    

tests/test_main.py .FFFFFFFF..                                                                                                  [100%]

============================================================== FAILURES ===============================================================
______________________________________________________________ test_get _______________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_get(server):
        url = str(server.url)
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: text/plain",
            "Transfer-Encoding: chunked",
            "",
            "Hello, world!",
        ]
E       AssertionError: assert ['HTTP/1.1 20...ello, world!'] == ['HTTP/1.1 20...ello, world!']
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:29: AssertionError
-------------------------------------------------------- Captured stderr setup --------------------------------------------------------
INFO:     Started server process [258991]
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40574 - "GET / HTTP/1.1" 200 OK
______________________________________________________________ test_json ______________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_json(server):
        url = str(server.url.copy_with(path="/json"))
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: application/json",
            "Transfer-Encoding: chunked",
            "",
            "{",
            '"Hello": "world!"',
            "}",
        ]
E       AssertionError: assert ['HTTP/1.1 20... '', '{', ...] == ['HTTP/1.1 20... '', '{', ...]
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:44: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40578 - "GET /json HTTP/1.1" 200 OK
_____________________________________________________________ test_binary _____________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_binary(server):
        url = str(server.url.copy_with(path="/echo_binary"))
        runner = CliRunner()
        content = "Hello, world!"
        result = runner.invoke(httpx.main, [url, "-c", content])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: application/octet-stream",
            "Transfer-Encoding: chunked",
            "",
            f"<{len(content)} bytes of binary data>",
        ]
E       AssertionError: assert ['HTTP/1.1 20...binary data>'] == ['HTTP/1.1 20...binary data>']
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:62: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40580 - "POST /echo_binary HTTP/1.1" 200 OK
___________________________________________________________ test_redirects ____________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_redirects(server):
        url = str(server.url.copy_with(path="/redirect_301"))
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url])
        assert result.exit_code == 1
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 301 Moved Permanently",
            "server: uvicorn",
            "location: /",
            "Transfer-Encoding: chunked",
            "",
        ]
E       AssertionError: assert ['HTTP/1.1 30... chunked', ''] == ['HTTP/1.1 30... chunked', '']
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:77: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40582 - "GET /redirect_301 HTTP/1.1" 301 Moved Permanently
________________________________________________________ test_follow_redirects ________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_follow_redirects(server):
        url = str(server.url.copy_with(path="/redirect_301"))
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url, "--follow-redirects"])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 301 Moved Permanently",
            "server: uvicorn",
            "location: /",
            "Transfer-Encoding: chunked",
            "",
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: text/plain",
            "Transfer-Encoding: chunked",
            "",
            "Hello, world!",
        ]
E       AssertionError: assert ['HTTP/1.1 30... 200 OK', ...] == ['HTTP/1.1 30... 200 OK', ...]
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:91: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40588 - "GET /redirect_301 HTTP/1.1" 301 Moved Permanently
INFO:     127.0.0.1:40588 - "GET / HTTP/1.1" 200 OK
______________________________________________________________ test_post ______________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_post(server):
        url = str(server.url.copy_with(path="/echo_body"))
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url, "-m", "POST", "-j", '{"hello": "world"}'])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: text/plain",
            "Transfer-Encoding: chunked",
            "",
            '{"hello":"world"}',
        ]
E       assert ['HTTP/1.1 20...lo":"world"}'] == ['HTTP/1.1 20...lo":"world"}']
E         
E         At index 3 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:111: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40592 - "POST /echo_body HTTP/1.1" 200 OK
____________________________________________________________ test_verbose _____________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_verbose(server):
        url = str(server.url)
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url, "-v"])
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "* Connecting to '127.0.0.1'",
            "* Connected to '127.0.0.1' on port 8000",
            "GET / HTTP/1.1",
            f"Host: {server.url.netloc.decode('ascii')}",
            "Accept: */*",
            "Accept-Encoding: gzip, deflate, br, zstd",
            "Connection: keep-alive",
            f"User-Agent: python-httpx/{httpx.__version__}",
            "",
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: text/plain",
            "Transfer-Encoding: chunked",
            "",
            "Hello, world!",
        ]
E       assert ["* Connectin...r, zstd', ...] == ["* Connectin...r, zstd', ...]
E         
E         At index 12 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:126: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40604 - "GET / HTTP/1.1" 200 OK
______________________________________________________________ test_auth ______________________________________________________________

server = <tests.conftest.TestServer object at 0x7f9c773d1520>

    def test_auth(server):
        url = str(server.url)
        runner = CliRunner()
        result = runner.invoke(httpx.main, [url, "-v", "--auth", "username", "password"])
        print(result.output)
        assert result.exit_code == 0
>       assert remove_date_header(splitlines(result.output)) == [
            "* Connecting to '127.0.0.1'",
            "* Connected to '127.0.0.1' on port 8000",
            "GET / HTTP/1.1",
            f"Host: {server.url.netloc.decode('ascii')}",
            "Accept: */*",
            "Accept-Encoding: gzip, deflate, br, zstd",
            "Connection: keep-alive",
            f"User-Agent: python-httpx/{httpx.__version__}",
            "Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=",
            "",
            "HTTP/1.1 200 OK",
            "server: uvicorn",
            "content-type: text/plain",
            "Transfer-Encoding: chunked",
            "",
            "Hello, world!",
        ]
E       assert ["* Connectin...r, zstd', ...] == ["* Connectin...r, zstd', ...]
E         
E         At index 13 diff: 'transfer-encoding: chunked' != 'Transfer-Encoding: chunked'
E         Use -v to get more diff

tests/test_main.py:151: AssertionError
-------------------------------------------------------- Captured stdout call ---------------------------------------------------------
INFO:     127.0.0.1:40616 - "GET / HTTP/1.1" 200 OK
* Connecting to '127.0.0.1'
* Connected to '127.0.0.1' on port 8000
GET / HTTP/1.1
Host: 127.0.0.1:8000
Accept: */*
Accept-Encoding: gzip, deflate, br, zstd
Connection: keep-alive
User-Agent: python-httpx/0.28.0
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

HTTP/1.1 200 OK
date: Sat, 30 Nov 2024 07:33:14 GMT
server: uvicorn
content-type: text/plain
transfer-encoding: chunked

Hello, world!

===================================================== 8 failed, 3 passed in 0.45s =====================================================

It seems that it's only a matter of different case, so perhaps it'd be easy to fix.

[yan12125]

FWIW, I have been using this patch on Arch Linux for some time. Admittedly, I'm too lazy to push it upstream
https://gitlab.archlinux.org/archlinux/packaging/packages/python-httpx/-/blob/main/uvicorn-test-server-use-h11.diff