[1.26] Fix downstream tests (#3409)

* Skip hanging requests test

* [1.26] Backport downstream tests improvements

This will run tests every time to catch regression earlier.

.github/workflows/downstream.yml

@@ -0,0 +1,29 @@
+name: Downstream
+
+on: [push, pull_request, workflow_dispatch]
+
+permissions: "read-all"
+
+jobs:
+  downstream:
+    strategy:
+      fail-fast: false
+      matrix:
+        downstream: [botocore, requests]
+    runs-on: ubuntu-22.04
+    timeout-minutes: 30
+
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v4
+
+      - name: "Setup Python"
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+
+      - name: "Install dependencies"
+        run: python -m pip install --upgrade nox
+
+      - name: "Run downstream tests"
+        run: nox -s downstream_${{ matrix.downstream }}

ci/skip-hanging-requests-test.patch

@@ -0,0 +1,12 @@
+diff --git a/tests/test_requests.py b/tests/test_requests.py
+index b4e9fe92..b150bb3f 100644
+--- a/tests/test_requests.py
++++ b/tests/test_requests.py
+@@ -914,6 +914,7 @@ class TestRequests:
+     def test_unicode_get(self, httpbin, url, params):
+         requests.get(httpbin(url), params=params)
+
++    @pytest.mark.skip(reason="https://github.com/psf/requests/issues/6734#issuecomment-2173121514")
+     def test_unicode_header_name(self, httpbin):
+         requests.put(
+             httpbin("put"),

noxfile.py

@@ -81,7 +81,7 @@ def git_clone(session, git_url):
     session.run("git", "clone", "--depth", "1", git_url, external=True)
 
 
-@nox.session(python=["3.10"])
+@nox.session()
 def downstream_botocore(session):
     root = os.getcwd()
     tmp_dir = session.create_tmp()
@@ -99,14 +99,20 @@ def downstream_botocore(session):
     session.run("python", "scripts/ci/run-tests")
 
 
-@nox.session(python=["3.10"])
+@nox.session()
 def downstream_requests(session):
     root = os.getcwd()
     tmp_dir = session.create_tmp()
 
     session.cd(tmp_dir)
     git_clone(session, "https://github.com/psf/requests")
     session.chdir("requests")
+
+    # https://github.com/psf/requests/issues/6734#issuecomment-2173121514
+    session.run(
+        "git", "apply", f"{root}/ci/skip-hanging-requests-test.patch", external=True
+    )
+
     session.run("git", "rev-parse", "HEAD", external=True)
     session.install(".[socks]", silent=False)
     session.install("-r", "requirements-dev.txt", silent=False)