fix overriden/extended fixtures

Author: andresliszt

src/_pytest/fixtures.py

@@ -1521,6 +1521,20 @@ def getfixtureclosure(
         # to re-discover fixturedefs again for each fixturename
         # (discovering matching fixtures for a given name/node is expensive).
 
+        def dependent_fixtures_argnames(
+            fixture_defs: Sequence[FixtureDef[Any]],
+        ) -> List[str]:
+            last_fixture = fixture_defs[-1]
+            # Initialize with the argnames of the last fixture
+            dependent_argnames = list(last_fixture.argnames)
+            for arg in fixture_defs:
+                if arg.argname in last_fixture.argnames:
+                    # Add new argument names maintaining order and avoiding duplicates
+                    for argname in arg.argnames:
+                        if argname not in dependent_argnames:
+                            dependent_argnames.append(argname)
+            return dependent_argnames
+
         fixturenames_closure = list(initialnames)
 
         arg2fixturedefs: Dict[str, Sequence[FixtureDef[Any]]] = {}
@@ -1535,7 +1549,8 @@ def getfixtureclosure(
                 fixturedefs = self.getfixturedefs(argname, parentnode)
                 if fixturedefs:
                     arg2fixturedefs[argname] = fixturedefs
-                    for arg in fixturedefs[-1].argnames:
+                    argnames = dependent_fixtures_argnames(fixturedefs)
+                    for arg in argnames:
                         if arg not in fixturenames_closure:
                             fixturenames_closure.append(arg)
 

testing/test_mark.py

@@ -447,6 +447,35 @@ def test_func(a, b):
     assert result.ret == 0
 
 
+def test_parametrize_overriden_extended_fixture(pytester: Pytester) -> None:
+    """Overriden fixtures must pass over dependend fixtures for parameterization (#12091)"""
+    py_file = pytester.makepyfile(
+        """\
+        import pytest
+
+        @pytest.fixture
+        def param() -> int:
+            return 1
+
+        @pytest.fixture
+        def main(param: int) -> int:
+            return sum(range(param + 1))
+
+
+        class TestFoo:
+            @pytest.fixture
+            def main(self, main: int) -> int:
+                return main
+
+            @pytest.mark.parametrize("param", [2])
+            def test_foo(self, main: int) -> None:
+                assert main == 3
+        """
+    )
+    result = pytester.runpytest(py_file)
+    assert result.ret == 0
+
+
 def test_parametrize_iterator(pytester: Pytester) -> None:
     """`parametrize` should work with generators (#5354)."""
     py_file = pytester.makepyfile(