test/helper.rb in tracksperanto-1.9.2 vs test/helper.rb in tracksperanto-1.9.3

@@ -70,17 +70,24 @@
       yield(x) if block_given?
       export_parabolics_with(x)
     end
   end
   
-  def ensure_same_output(exporter_klass, reference_path, message = "Should write identical output")
+  def ensure_same_output(exporter_klass, reference_path, message = "The line should be identical")
     io = StringIO.new
     x = exporter_klass.new(io)
     yield(x) if block_given?
     export_parabolics_with(x)
-    io.close
+    io.rewind
     
-    assert_equal File.read(reference_path), io.string, message
+    File.open(reference_path, "r") do | f |
+      at_line = 0
+      until f.eof? || io.eof?
+        at_line += 1
+        reference_line, output_line = f.readline, io.readline
+        assert_equal reference_line, output_line, "Line #{at_line} - #{message}"
+      end
+    end
   end
   
   def export_parabolics_with(exporter)
     exporter.start_export(1920, 1080)
     [FIRST_TRACK, SECOND_TRACK].each do | t |
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