Remove PytestRemovedIn9Warning

Per our deprecation policy.

Fix #13893.

Author: bluetech

doc/en/reference/reference.rst

@@ -1291,7 +1291,7 @@ Custom warnings generated in some situations such as improper usage or deprecate
 .. autoclass:: pytest.PytestReturnNotNoneWarning
   :show-inheritance:
 
-.. autoclass:: pytest.PytestRemovedIn9Warning
+.. autoclass:: pytest.PytestRemovedIn10Warning
   :show-inheritance:
 
 .. autoclass:: pytest.PytestUnknownMarkWarning

src/_pytest/warning_types.py

@@ -50,12 +50,6 @@ class PytestDeprecationWarning(PytestWarning, DeprecationWarning):
     __module__ = "pytest"
 
 
-class PytestRemovedIn9Warning(PytestDeprecationWarning):
-    """Warning class for features that will be removed in pytest 9."""
-
-    __module__ = "pytest"
-
-
 class PytestRemovedIn10Warning(PytestDeprecationWarning):
     """Warning class for features that will be removed in pytest 10."""
 

src/_pytest/warnings.py

@@ -41,7 +41,8 @@ def catch_warnings_for_item(
             warnings.filterwarnings("always", category=DeprecationWarning)
             warnings.filterwarnings("always", category=PendingDeprecationWarning)
 
-        warnings.filterwarnings("error", category=pytest.PytestRemovedIn9Warning)
+        # To be enabled in pytest 10.0.0.
+        # warnings.filterwarnings("error", category=pytest.PytestRemovedIn10Warning)
 
         apply_warning_filters(config_filters, cmdline_filters)
 

src/pytest/__init__.py

@@ -83,7 +83,6 @@
 from _pytest.warning_types import PytestDeprecationWarning
 from _pytest.warning_types import PytestExperimentalApiWarning
 from _pytest.warning_types import PytestFDWarning
-from _pytest.warning_types import PytestRemovedIn9Warning
 from _pytest.warning_types import PytestRemovedIn10Warning
 from _pytest.warning_types import PytestReturnNotNoneWarning
 from _pytest.warning_types import PytestUnhandledThreadExceptionWarning
@@ -135,7 +134,6 @@
     "PytestExperimentalApiWarning",
     "PytestFDWarning",
     "PytestPluginManager",
-    "PytestRemovedIn9Warning",
     "PytestRemovedIn10Warning",
     "PytestReturnNotNoneWarning",
     "PytestUnhandledThreadExceptionWarning",

testing/test_warnings.py

@@ -562,8 +562,7 @@ def test_invalid_regex_in_filterwarning(self, pytester: Pytester) -> None:
         )
 
 
-# In 9.1, uncomment below and change RemovedIn9 -> RemovedIn10.
-# @pytest.mark.skip("not relevant until pytest 10.0")
+@pytest.mark.skip("not relevant until pytest 10.0")
 @pytest.mark.parametrize("change_default", [None, "ini", "cmdline"])
 def test_removed_in_x_warning_as_error(pytester: Pytester, change_default) -> None:
     """This ensures that PytestRemovedInXWarnings raised by pytest are turned into errors.
@@ -575,20 +574,20 @@ def test_removed_in_x_warning_as_error(pytester: Pytester, change_default) -> No
         """
         import warnings, pytest
         def test():
-            warnings.warn(pytest.PytestRemovedIn9Warning("some warning"))
+            warnings.warn(pytest.PytestRemovedIn10Warning("some warning"))
     """
     )
     if change_default == "ini":
         pytester.makeini(
             """
             [pytest]
             filterwarnings =
-                ignore::pytest.PytestRemovedIn9Warning
+                ignore::pytest.PytestRemovedIn10Warning
         """
         )
 
     args = (
-        ("-Wignore::pytest.PytestRemovedIn9Warning",)
+        ("-Wignore::pytest.PytestRemovedIn10Warning",)
         if change_default == "cmdline"
         else ()
     )