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Diffstat (limited to 'src/zope/interface/interface.py')
| -rw-r--r-- | src/zope/interface/interface.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/zope/interface/interface.py b/src/zope/interface/interface.py index d100aae..c5d1852 100644 --- a/src/zope/interface/interface.py +++ b/src/zope/interface/interface.py @@ -413,6 +413,13 @@ class Specification(SpecificationBase): __setBases, ) + # This method exists for tests to override the way we call + # ro.calculate_ro(), usually by adding extra kwargs. We don't + # want to have a mutable dictionary as a class member that we pass + # ourself because mutability is bad, and passing **kw is slower than + # calling the bound function. + _do_calculate_ro = calculate_ro + def _calculate_sro(self): """ Calculate and return the resolution order for this object, using its ``__bases__``. @@ -448,7 +455,7 @@ class Specification(SpecificationBase): # This requires that by the time this method is invoked, our bases # have settled their SROs. Thus, ``changed()`` must first # update itself before telling its descendents of changes. - sro = calculate_ro(self, base_mros={ + sro = self._do_calculate_ro(base_mros={ b: b.__sro__ for b in self.__bases__ }) |