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from logilab.common.testlib import TestCase, unittest_main
from logilab.common.interface import *
class IFace1(Interface): pass
class IFace2(Interface): pass
class IFace3(Interface): pass
class A(object):
__implements__ = (IFace1,)
class B(A): pass
class C1(B):
__implements__ = list(B.__implements__) + [IFace3]
class C2(B):
__implements__ = B.__implements__ + (IFace2,)
class D(C1):
__implements__ = ()
class Z(object): pass
class ExtendTC(TestCase):
def setUp(self):
global aimpl, c1impl, c2impl, dimpl
aimpl = A.__implements__
c1impl = C1.__implements__
c2impl = C2.__implements__
dimpl = D.__implements__
def test_base(self):
extend(A, IFace2)
self.failUnlessEqual(A.__implements__, (IFace1, IFace2))
self.failUnlessEqual(B.__implements__, (IFace1, IFace2))
self.failUnless(B.__implements__ is A.__implements__)
self.failUnlessEqual(C1.__implements__, [IFace1, IFace3, IFace2])
self.failUnlessEqual(C2.__implements__, (IFace1, IFace2))
self.failUnless(C2.__implements__ is c2impl)
self.failUnlessEqual(D.__implements__, (IFace2,))
def test_already_impl(self):
extend(A, IFace1)
self.failUnless(A.__implements__ is aimpl)
def test_no_impl(self):
extend(Z, IFace1)
self.failUnlessEqual(Z.__implements__, (IFace1,))
def test_notimpl_explicit(self):
extend(C1, IFace3)
self.failUnless(C1.__implements__ is c1impl)
self.failUnless(D.__implements__ is dimpl)
def test_nonregr_implements_baseinterface(self):
class SubIFace(IFace1): pass
class X(object):
__implements__ = (SubIFace,)
self.failUnless(SubIFace.is_implemented_by(X))
self.failUnless(IFace1.is_implemented_by(X))
if __name__ == '__main__':
unittest_main()
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