can use requires with self option

test/test_requires.py

@@ -58,6 +58,24 @@ def test_requires():
     api.option('ip_address_service').value.get()
 
 
+def test_requires_self():
+    a = StrOption('ip_address_service', '',
+                  requires=[{'option': 'self', 'expected': 'b', 'action': 'disabled'}])
+    od = OptionDescription('service', '', [a])
+    api = getapi(Config(od))
+    api.property.read_write()
+    assert api.option('ip_address_service').value.get() == None
+    api.option('ip_address_service').value.set('a')
+    assert api.option('ip_address_service').value.get() == 'a'
+    api.option('ip_address_service').value.set('b')
+    props = []
+    try:
+        api.option('ip_address_service').value.get()
+    except PropertiesOptionError as err:
+        props = err.proptype
+    assert frozenset(props) == frozenset(['disabled'])
+
+
 def test_requires_with_requires():
     a = BoolOption('activate_service', '', True)
     b = IPOption('ip_address_service', '',