33: def handle_matcher(actual, matcher, &block)
34: if :use_operator_matcher == matcher
35: return Spec::Matchers::NegativeOperatorMatcher.new(actual)
36: end
37:
38: unless matcher.respond_to?(:matches?)
39: raise InvalidMatcherError, "Expected a matcher, got #{matcher.inspect}."
40: end
41:
42: unless matcher.respond_to?(:negative_failure_message)
43: Spec::Expectations.fail_with(
44: "Matcher does not support should_not.\nSee Spec::Matchers for more information\nabout matchers.\n"
45: )
46: end
47: match = matcher.matches?(actual, &block)
48: ::Spec::Matchers.generated_description = "should not #{describe_matcher(matcher)}"
49: Spec::Expectations.fail_with(matcher.negative_failure_message) if match
50: end