test/helper.rb in tracksperanto-1.7.5 vs test/helper.rb in tracksperanto-1.8.0

@@ -70,17 +70,17 @@
       yield(x) if block_given?
       export_parabolics_with(x)
     end
   end
   
-  def ensure_same_output(exporter_klass, reference_path)
+  def ensure_same_output(exporter_klass, reference_path, message = "Should write identical output")
     io = StringIO.new
     x = exporter_klass.new(io)
     yield(x) if block_given?
     export_parabolics_with(x)
     io.close
     
-    assert_equal File.read(reference_path), io.string
+    assert_equal File.read(reference_path), io.string, message
   end
   
   def export_parabolics_with(exporter)
     exporter.start_export(1920, 1080)
     [FIRST_TRACK, SECOND_TRACK].each do | t |
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