test/test_helper.rb in roo-1.9.3 vs test/test_helper.rb in roo-1.9.4

@@ -15,5 +15,35 @@
 def local_only
   if ENV["roo_local"] == "thomas-p"
     yield
   end
 end
+
+# very simple diff implementation
+# output is an empty string if the files are equal
+# otherwise differences a printen (not compatible to
+# the diff command)
+def diff(fn1,fn2)
+  result = ''
+  f1 = File.open(fn1)
+  f2 = File.open(fn2)
+  while f1.eof? == false and f2.eof? == false
+    line1 = f1.gets
+    line2 = f2.gets
+    result << "<#{line1}\n>#{line2}\n" if line1 != line2
+  end
+  if f1.eof? == false
+    while f1.eof? == false
+      line1 = f1.gets
+      result << "<#{line1}\n"
+    end
+  end
+  if f2.eof? == false
+    while f2.eof? == false
+      line2 = f2.gets
+      result ">#{line2}\n"
+    end
+  end
+  f1.close
+  f2.close
+  result
+end