'Look for a module with matching and non-matching sensitivity.'

def sensitivity_test(self):

    sensitive_pkg = 'sensitive.{0}'.format(self.name)
    insensitive_pkg = 'insensitive.{0}'.format(self.name.lower())
    context = util.create_modules(insensitive_pkg, sensitive_pkg)
    with context as mapping:
        sensitive_path = os.path.join(mapping['.root'], 'sensitive')
        insensitive_path = os.path.join(mapping['.root'], 'insensitive')
        sensitive_finder = self.finder(sensitive_path)
        insensitive_finder = self.finder(insensitive_path)
        return (self.find(sensitive_finder), self.find(insensitive_finder))
