remove pytest namespace hook

changelog/4421.removal.rst

@@ -0,0 +1 @@
+Remove the implementation of the pytest_namespace hook.

src/_pytest/config/__init__.py

@@ -610,13 +610,6 @@ def __init__(self, pluginmanager):
         self.pluginmanager.register(self, "pytestconfig")
         self._configured = False
         self.invocation_dir = py.path.local()
-
-        def do_setns(dic):
-            import pytest
-
-            setns(pytest, dic)
-
-        self.hook.pytest_namespace.call_historic(do_setns, {})
         self.hook.pytest_addoption.call_historic(kwargs=dict(parser=self._parser))
 
     def add_cleanup(self, func):

src/_pytest/deprecated.py

@@ -113,9 +113,6 @@
     "Please move it to the top level conftest file instead."
 )
 
-PYTEST_NAMESPACE = RemovedInPytest4Warning(
-    "pytest_namespace is deprecated and will be removed soon"
-)
 
 PYTEST_ENSURETEMP = RemovedInPytest4Warning(
     "pytest/tmpdir_factory.ensuretemp is deprecated, \n"

src/_pytest/hookspec.py

@@ -1,8 +1,6 @@
 """ hook specifications for pytest plugins, invoked from main.py and builtin plugins.  """
 from pluggy import HookspecMarker
 
-from .deprecated import PYTEST_NAMESPACE
-
 
 hookspec = HookspecMarker("pytest")
 
@@ -24,32 +22,6 @@ def pytest_addhooks(pluginmanager):
     """
 
 
-@hookspec(historic=True, warn_on_impl=PYTEST_NAMESPACE)
-def pytest_namespace():
-    """
-    return dict of name->object to be made globally available in
-    the pytest namespace.
-
-    This hook is called at plugin registration time.
-
-    .. note::
-        This hook is incompatible with ``hookwrapper=True``.
-
-    .. warning::
-        This hook has been **deprecated** and will be removed in pytest 4.0.
-
-        Plugins whose users depend on the current namespace functionality should prepare to migrate to a
-        namespace they actually own.
-
-        To support the migration it's suggested to trigger ``DeprecationWarnings`` for objects they put into the
-        pytest namespace.
-
-        A stopgap measure to avoid the warning is to monkeypatch the ``pytest`` module, but just as the
-        ``pytest_namespace`` hook this should be seen as a temporary measure to be removed in future versions after
-        an appropriate transition period.
-    """
-
-
 @hookspec(historic=True)
 def pytest_plugin_registered(plugin, manager):
     """ a new pytest plugin got registered.

testing/test_pluginmanager.py

@@ -59,37 +59,6 @@ def pytest_addhooks(pluginmanager):
         assert res.ret != 0
         res.stderr.fnmatch_lines(["*did not find*sys*"])
 
-    def test_namespace_early_from_import(self, testdir):
-        p = testdir.makepyfile(
-            """
-            from pytest import Item
-            from pytest import Item as Item2
-            assert Item is Item2
-        """
-        )
-        result = testdir.runpython(p)
-        assert result.ret == 0
-
-    @pytest.mark.filterwarnings("ignore:pytest_namespace is deprecated")
-    def test_do_ext_namespace(self, testdir):
-        testdir.makeconftest(
-            """
-            def pytest_namespace():
-                return {'hello': 'world'}
-        """
-        )
-        p = testdir.makepyfile(
-            """
-            from pytest import hello
-            import pytest
-            def test_hello():
-                assert hello == "world"
-                assert 'hello' in pytest.__all__
-        """
-        )
-        reprec = testdir.inline_run(p)
-        reprec.assertoutcome(passed=1)
-
     def test_do_option_postinitialize(self, testdir):
         config = testdir.parseconfigure()
         assert not hasattr(config.option, "test123")
@@ -190,17 +159,6 @@ def pytest_testhook():
         assert "deprecated" in warnings[-1]
 
 
-def test_namespace_has_default_and_env_plugins(testdir):
-    p = testdir.makepyfile(
-        """
-        import pytest
-        pytest.mark
-    """
-    )
-    result = testdir.runpython(p)
-    assert result.ret == 0
-
-
 def test_default_markers(testdir):
     result = testdir.runpytest("--markers")
     result.stdout.fnmatch_lines(["*tryfirst*first*", "*trylast*last*"])