1 files changed, 43 insertions, 0 deletions
diff --git a/ipalib/tests/test_plugable.py b/ipalib/tests/test_plugable.py
index b8242dce..8ce98610 100644
--- a/ipalib/tests/test_plugable.py
+++ b/ipalib/tests/test_plugable.py
@@ -183,6 +183,49 @@ class test_ProxyTarget(ClassChecker):
             assert ex.implements(any_object)
             assert ex.implements(any_object())
 
+    def test_implemented_by(self):
+        """
+        Tests the `implemented_by` classmethod.
+        """
+        class base(self.cls):
+            __public__ = frozenset((
+                'attr0',
+                'attr1',
+                'attr2',
+            ))
+
+        class okay(base):
+            def attr0(self):
+                pass
+            def __get_attr1(self):
+                assert False # Make sure property isn't accesed on instance
+            attr1 = property(__get_attr1)
+            attr2 = 'hello world'
+            another_attr = 'whatever'
+
+        class fail(base):
+            def __init__(self):
+                # Check that class, not instance is inspected:
+                self.attr2 = 'hello world'
+            def attr0(self):
+                pass
+            def __get_attr1(self):
+                assert False # Make sure property isn't accesed on instance
+            attr1 = property(__get_attr1)
+            another_attr = 'whatever'
+
+        # Test that AssertionError is raised trying to pass something not
+        # subclass nor instance of base:
+        raises(AssertionError, base.implemented_by, object)
+
+        # Test on subclass with needed attributes:
+        assert base.implemented_by(okay) is True
+        assert base.implemented_by(okay()) is True
+
+        # Test on subclass *without* needed attributes:
+        assert base.implemented_by(fail) is False
+        assert base.implemented_by(fail()) is False
+
 
 class test_Proxy(ClassChecker):
     """