Add a couple more tests

tests/test_util.py

@@ -3,6 +3,9 @@ from lib import util
 
 def test_cachedproperty():
     class Target:
+
+        CALL_COUNT = 0
+
         def __init__(self):
             self.call_count = 0
 
@@ -11,8 +14,15 @@ def test_cachedproperty():
             self.call_count += 1
             return self.call_count
 
+        @util.cachedproperty
+        def cls_prop(cls):
+            cls.CALL_COUNT += 1
+            return cls.CALL_COUNT
+
+
     t = Target()
     assert t.prop == t.prop == 1
+    assert Target.cls_prop == Target.cls_prop == 1
 
 
 def test_deep_getsizeof():
@@ -36,6 +46,7 @@ class B(Base):
 
 def test_subclasses():
     assert util.subclasses(Base) == [A, B]
+    assert util.subclasses(Base, strict=False) == [A, B, Base]
 
 
 def test_chunks():