support usefixtures with parametrize

Author: ShurikMen

src/_pytest/python.py

@@ -507,14 +507,26 @@ def _genfunctions(self, name: str, funcobj) -> Iterator["Function"]:
 
             for callspec in metafunc._calls:
                 subname = f"{name}[{callspec.id}]"
-                yield Function.from_parent(
+                node = Function.from_parent(
                     self,
                     name=subname,
                     callspec=callspec,
                     fixtureinfo=fixtureinfo,
                     keywords={callspec.id: True},
                     originalname=name,
                 )
+                # if usefixtures is added via a parameter, then there will be
+                # fixtures missing from the node.fixturenames
+                callspec_usefixtures = tuple(
+                    arg
+                    for mark in node.iter_markers(name="usefixtures")
+                    for arg in mark.args
+                    if arg not in node.fixturenames
+                )
+                if callspec_usefixtures:
+                    # node.fixturenames must be unique for this parameter
+                    node.fixturenames = [*node.fixturenames, *callspec_usefixtures]
+                yield node
 
 
 def importtestmodule(

testing/python/metafunc.py

@@ -2112,3 +2112,31 @@ def test_converted_to_str(a, b):
                 "*= 6 passed in *",
             ]
         )
+
+    def test_simple_usefixtures_single_argname(self, pytester: Pytester) -> None:
+        pytester.makepyfile(
+            """
+            import pytest
+
+            @pytest.fixture
+            def some_fixture():
+                pytest.skip()
+
+            @pytest.mark.parametrize("val", [
+                1,
+                pytest.param(2, marks=pytest.mark.usefixtures('some_fixture')),
+                3,
+            ])
+            def test_foo(request, val):
+                assert val
+        """
+        )
+        result = pytester.runpytest("-vv", "-s")
+        result.assert_outcomes(passed=2, skipped=1)
+        result.stdout.fnmatch_lines(
+            [
+                "test_simple_usefixtures_single_argname.py::test_foo[1] PASSED",
+                "test_simple_usefixtures_single_argname.py::test_foo[2] SKIPPED",
+                "test_simple_usefixtures_single_argname.py::test_foo[3] PASSED",
+            ]
+        )