def test_metaclass_inheritance_double_assignment(self):
t = CMetaclass("T")
m1 = CMetaclass("M1")
try:
m1.superclasses = [t, t]
exception_expected_()
except CException as e:
eq_("'T' is already a superclass of 'M1'", e.value)
eq_(m1.name, "M1")
eq_(t.name, "T")
eq_(set(m1.superclasses), {t})
def test_metaclass_superclasses_reassignment(self):
t = CMetaclass("T")
m1 = CMetaclass("M1", superclasses=[t])
m2 = CMetaclass("M2", superclasses=[t])
b1 = CMetaclass("B1", superclasses=[m1])
b2 = CMetaclass("B2", superclasses=[m1])
b3 = CMetaclass("B3", superclasses=[t])
m1.superclasses = []
b1.superclasses = []
b2.superclasses = []
eq_(set(t.superclasses), set())
eq_(set(t.subclasses), {m2, b3})
eq_(set(t.all_superclasses), set())
eq_(set(t.all_subclasses), {m2, b3})
eq_(set(m1.superclasses), set())
eq_(set(m1.subclasses), set())
eq_(set(m1.all_superclasses), set())
eq_(set(m1.all_subclasses), set())
eq_(set(m2.superclasses), {t})
eq_(set(m2.subclasses), set())
eq_(set(m2.all_superclasses), {t})
eq_(set(m2.all_subclasses), set())
eq_(set(b1.superclasses), set())
eq_(set(b1.subclasses), set())
eq_(set(b1.all_superclasses), set())
eq_(set(b1.all_subclasses), set())
eq_(set(b2.superclasses), set())
eq_(set(b2.subclasses), set())
eq_(set(b2.all_superclasses), set())
eq_(set(b2.all_subclasses), set())
eq_(set(b3.superclasses), {t})
eq_(set(b3.subclasses), set())
eq_(set(b3.all_superclasses), {t})
eq_(set(b3.all_subclasses), set())
