cannot set properties if those properties are in requirement

test/test_requires.py

@@ -112,6 +112,40 @@ def test_multiple_requires_cumulative():
     c.ip_address_service
 
 
+def test_multiple_requires_cumulative_inverse():
+    a = StrOption('activate_service', '')
+    b = IPOption('ip_address_service', '',
+                 requires=[{'option': a, 'expected': 'yes', 'action': 'disabled', 'inverse': True},
+                           {'option': a, 'expected': 'yes', 'action': 'hidden', 'inverse': True}])
+    od = OptionDescription('service', '', [a, b])
+    c = Config(od)
+    c.read_write()
+    props = []
+    try:
+        c.ip_address_service
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert set(props) == set(['hidden', 'disabled'])
+    c.activate_service = 'yes'
+    c.ip_address_service
+
+    c.activate_service = 'ok'
+    props = []
+    try:
+        c.ip_address_service
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert set(props) == set(['hidden', 'disabled'])
+
+    c.activate_service = 'no'
+    props = []
+    try:
+        c.ip_address_service
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert set(props) == set(['hidden', 'disabled'])
+
+
 def test_multiple_requires_inverse():
     a = StrOption('activate_service', '')
     b = IPOption('ip_address_service', '',
@@ -500,3 +534,9 @@ def test_set_item():
     c = Config(od)
     c.read_write()
     raises(ValueError, 'c.cfgimpl_get_settings()[a] = ("test",)')
+
+
+def test_properties_conflict():
+    a = BoolOption('activate_service', '', True)
+    raises(ValueError, "IPOption('ip_address_service', '', properties=('disabled',), requires=[{'option': a, 'expected': False, 'action': 'disabled'}])")
+    raises(ValueError, "od1 = OptionDescription('service', '', [a], properties=('disabled',), requires=[{'option': a, 'expected': False, 'action': 'disabled'}])")

test/test_slots.py

@@ -107,7 +107,7 @@ def test_slots_option_readonly_name():
 
 
 def test_slots_description():
-    # __slots__ for OptionDescription must be complete
+    # __slots__ for OptionDescription should be complete for __getattr__
     slots = set()
     for subclass in OptionDescription.__mro__:
         if subclass is not object: