Raise AttributeError for File.gethookproxy

Author: blueyed

src/_pytest/nodes.py

@@ -432,6 +432,13 @@ def __init__(
         self._norecursepatterns = self.config.getini("norecursedirs")
 
     def gethookproxy(self, fspath):
+        from _pytest.main import Session  # noqa: F811
+        from _pytest.python import Package
+
+        if not isinstance(self, (Session, Package)):
+            # Prevent making it "more public" with the move to the base class.
+            raise AttributeError()
+
         # check if we have the common case of running
         # hooks with all conftest.py files
         pm = self.config.pluginmanager

testing/test_nodes.py

@@ -51,3 +51,13 @@ class FakeSession:
 
     outside = py.path.local("/outside")
     assert nodes._check_initialpaths_for_relpath(FakeSession, outside) is None
+
+
+def test_node_gethookproxy_only_on_session_and_package(pytestconfig):
+    file = nodes.File(
+        fspath=py.path.local(), session=object, nodeid="nodeid", config=pytestconfig
+    )
+    with pytest.raises(TypeError):
+        file.gethookproxy()
+    with pytest.raises(AttributeError):
+        file.gethookproxy("foo")