Changeset 87 for trunk/spec/lib/matchers.rb

Timestamp:

09/01/08 15:24:13 (4 months ago)

Author:

deveiant

Message:

• Checkpoint commit of MarkdownTest? integration

Files:

• trunk/spec/lib/matchers.rb (modified) (4 diffs)

trunk/spec/lib/matchers.rb

@@ -1 +1 @@
 #!/usr/bin/env ruby
 
-require 'bluecloth'
-require 'spec/matchers'
+begin
+    require 'bluecloth'
+    require 'diff/lcs'
+    require 'diff/lcs/callbacks'
+    require 'spec/lib/constants'
+rescue LoadError
+    unless Object.const_defined?( :Gem )
+        require 'rubygems'
+        retry
+    end
+    raise
+end
+
 
 ### Fixturing functions
-module BlueClothMatchers
+module BlueCloth::Matchers
 
     class TransformMatcher
@@ -19 +30 @@
             @bluecloth = bluecloth
             @output_html = bluecloth.to_html
-            return @output_html == @html
+            return @output_html.strip == @html.strip
         end
         
         ### Build a failure message for the matching case.
         def failure_message
-            return "Expected the generated html:\n\n  %p\n\nto be the same as:\n\n  %p\n\n" %
-                [ @output_html, @html ]
+            patch = self.make_patch( @html, @output_html )
+            return "Expected the generated html:\n\n  %p\n\nto be the same as:\n\n  %p\n\nDiffs:\n\n%s" %
+                [ @output_html, @html, patch ]
         end
         
@@ -33 +45 @@
                 [ @output_html, @html ]
         end
+        
+        ### Compute a patch between the given +expected+ output and the +actual+ output
+        ### and return it as a string.
+        def make_patch( expected, actual )
+            diffs = Diff::LCS.sdiff( expected.split("\n"), actual.split("\n"),
+                Diff::LCS::ContextDiffCallbacks )
+
+            maxcol = diffs.flatten.
+                collect {|d| [d.old_element.to_s.length, d.new_element.to_s.length ] }.
+                flatten.max || 0
+            maxcol += 4
+
+            patch = "              %#{maxcol}s | %s\n" % [ "Expected", "Actual" ]
+            patch << diffs.collect do |changeset|
+                changeset.collect do |change|
+                    "%s [%03d, %03d]: %#{maxcol}s | %-#{maxcol}s" % [
+                        change.action,
+                        change.old_position,
+                        change.new_position,
+                        change.old_element.inspect,
+                        change.new_element.inspect,
+                    ]
+                end.join("\n")
+            end.join("\n---\n")
+        end
+        
     end
 
@@ -87 +125 @@
         end
         
-        return BlueClothMatchers::TransformMatcher.new( html )
+        return BlueCloth::Matchers::TransformMatcher.new( html )
     end
     
     ### Generate a matcher that expects to match the given +regexp+.
     def be_transformed_into_html_matching( regexp )
-        return BlueClothMatchers::TransformMatcher.new( regexp )
+        return BlueCloth::Matchers::TransformMatcher.new( regexp )
     end
     
-end
+end # module BlueCloth::Matchers
 
-