diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_descr.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py index cf7ef2d..41c03a0 100644 --- a/Lib/test/test_descr.py +++ b/Lib/test/test_descr.py @@ -830,6 +830,34 @@ def multi(): vereq(int(Frag()), 42) # MI mixing classic and new-style classes. + + class A: + x = 1 + + class B(A): + pass + + class C(A): + x = 2 + + class D(B, C): + pass + vereq(D.x, 1) + + # Classic MRO is preserved for a classic base class. + class E(D, object): + pass + vereq(E.__mro__, (E, D, B, A, C, object)) + vereq(E.x, 1) + + # But with a mix of classic bases, their MROs are combined using + # new-style MRO. + class F(B, C, object): + pass + vereq(F.__mro__, (F, B, C, A, object)) + vereq(F.x, 2) + + # Try something else. class C: def cmethod(self): return "C a" @@ -875,6 +903,13 @@ def multi(): # XXX Expected this (the commented-out result): # vereq(M3.__mro__, (M3, M1, M2, object, D, C)) vereq(M3.__mro__, (M3, M1, M2, D, C, object)) # XXX ? + m = M3() + vereq(m.cmethod(), "C a") + vereq(m.dmethod(), "D a") + vereq(m.m1method(), "M1 a") + vereq(m.m2method(), "M2 a") + vereq(m.m3method(), "M3 a") + vereq(m.all_method(), "M3 b") def diamond(): if verbose: print "Testing multiple inheritance special cases..." |