[test] Add HTTP proxy tests (#9578)

Also fixes HTTPS proxies for curl_cffi

Authored by: coletdjnz

test/conftest.py

@@ -1,4 +1,3 @@
-import functools
 import inspect
 
 import pytest
@@ -10,7 +9,9 @@ from yt_dlp.utils._utils import _YDLLogger as FakeLogger
 
 @pytest.fixture
 def handler(request):
-    RH_KEY = request.param
+    RH_KEY = getattr(request, 'param', None)
+    if not RH_KEY:
+        return
     if inspect.isclass(RH_KEY) and issubclass(RH_KEY, RequestHandler):
         handler = RH_KEY
     elif RH_KEY in _REQUEST_HANDLERS:
@@ -18,9 +19,46 @@ def handler(request):
     else:
         pytest.skip(f'{RH_KEY} request handler is not available')
 
-    return functools.partial(handler, logger=FakeLogger)
+    class HandlerWrapper(handler):
+        RH_KEY = handler.RH_KEY
+
+        def __init__(self, *args, **kwargs):
+            super().__init__(logger=FakeLogger, *args, **kwargs)
+
+    return HandlerWrapper
 
 
-def validate_and_send(rh, req):
-    rh.validate(req)
-    return rh.send(req)
+@pytest.fixture(autouse=True)
+def skip_handler(request, handler):
+    """usage: pytest.mark.skip_handler('my_handler', 'reason')"""
+    for marker in request.node.iter_markers('skip_handler'):
+        if marker.args[0] == handler.RH_KEY:
+            pytest.skip(marker.args[1] if len(marker.args) > 1 else '')
+
+
+@pytest.fixture(autouse=True)
+def skip_handler_if(request, handler):
+    """usage: pytest.mark.skip_handler_if('my_handler', lambda request: True, 'reason')"""
+    for marker in request.node.iter_markers('skip_handler_if'):
+        if marker.args[0] == handler.RH_KEY and marker.args[1](request):
+            pytest.skip(marker.args[2] if len(marker.args) > 2 else '')
+
+
+@pytest.fixture(autouse=True)
+def skip_handlers_if(request, handler):
+    """usage: pytest.mark.skip_handlers_if(lambda request, handler: True, 'reason')"""
+    for marker in request.node.iter_markers('skip_handlers_if'):
+        if handler and marker.args[0](request, handler):
+            pytest.skip(marker.args[1] if len(marker.args) > 1 else '')
+
+
+def pytest_configure(config):
+    config.addinivalue_line(
+        "markers", "skip_handler(handler): skip test for the given handler",
+    )
+    config.addinivalue_line(
+        "markers", "skip_handler_if(handler): skip test for the given handler if condition is true"
+    )
+    config.addinivalue_line(
+        "markers", "skip_handlers_if(handler): skip test for handlers when the condition is true"
+    )