class TestBranchMergeProposalMergedViewBzr(
    TestBranchMergeProposalMergedViewMixin, BrowserTestCase):

def getCodebrowseUrl(self, revision):
        return self.context.merge_source.getCodebrowseUrl(
            "revision/%s" % quote_plus(revision))

Error: AttributeError: 'TestBranchMergeProposalMergedViewBzr' object has no attribute 'context'    


def getCodebrowseUrl(self, bpm, revision):
    return bpm.context.merge_source.getCodebrowseUrl(
        "revision/%s" % quote_plus(revision))

Error: ForbiddenAttribute: ('context', <BranchMergeProposal at 0x12dfc2d0>)