lib/aktion_test/matchers/base.rb in aktion_test-0.1.2 vs lib/aktion_test/matchers/base.rb in aktion_test-0.2.0

@@ -1,13 +1,45 @@
 module AktionTest
   module Matchers
     class Base
+      def initialize
+        @matches = nil
+      end
+
+      def matches?(subject)
+        return @matches unless @matches.nil?
+        @subject = subject
+        @matches = !!perform_match!
+      end
+
       def failure_message
-        "Expected #{expectation}\n#{problem}"
+        raise "Called failure message before determining a match from #{caller[0]}" if @matches.nil?
+        raise "Called failure message while the match was positive from #{caller[0]}" if @matches
+        "Expected #{expectation}\n#{problems_for_should}\n"
       end
 
       def negative_failure_message
-        "Did not expect #{expectation}"
+        raise "Called negative failure message before determining a match from #{caller[0]}" if @matches.nil?
+        raise "Called negative failure message while the match was unsucessful from #{caller[0]}" unless @matches
+        "Did not expect #{expectation}\n#{problems_for_should_not}\n"
+      end
+
+    protected
+
+      def expectation
+        "Override expectation to provide expectation details"
+      end
+      
+      def problems_for_should
+        "Override problem_for_should to set problems in the failure message output."
+      end
+
+      def problems_for_should_not
+        "Override problem_for_should_not to set problems in the failure message output."
+      end
+
+      def perform_match!
+        raise "Override perform_match! with your custom matching logic. The subject is available through @subject"
       end
     end
   end
 end