fi
 }
 
+diff_test()
+{
+  generated_file="$1"
+  expected_file="$2"
+  printf "== %s diff test ==\n" "$generated_file"
+  diff "$expected_file" "$generated_file"
+  if [ "$?" = "0" ]; then
+    echo "== test SUCCESS =="
+  else
+    echo "== test FAILURE =="
+  fi
+}
+
 rm -rf test/test_dir
 ./add_dir.sh test/test_dir
 cp test/test_files/test.md test/test_dir/
       echo "$file" | grep -q "\.html$"; then
     uuid_test "${cmp_file%.html}.uuid"
   fi
-  printf "== %s diff test ==\n" "$cmp_file"
-  diff "$file" "$cmp_file"
-  if [ "$?" = "0" ]; then
-    echo "== test SUCCESS =="
-  else
-    echo "== test FAILURE =="
-  fi
+  diff_test "$file" "$cmp_file"
 done
 uuid_test "test/test_dir/uuid.meta"
+original_file="test/test_dir/feed.xml"
+generated_file="$original_file".ignoring
+expected_file="test/test_files/feed.xml.ignoring"
+cat "$original_file" | \
+  sed 's/>[0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}T[0-9]\{2\}:[0-9]\{2\}:[0-9]\{2\}Z</>IGNORE</' | \
+  sed 's/>urn:uuid:[0-9a-f]\{8\}-[0-9a-f]\{4\}-[0-9a-f]\{4\}-[0-9a-f]\{4\}-[0-9a-f]\{12\}</>urn:uuid:IGNORE</' \
+  > "$generated_file"
+diff_test "$generated_file" "$expected_file"
+rm "$generated_file"
 
--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+<link href="http://example.org/" />
+<link href="http://example.org/feed.xml" rel="self" />
+<title type="html">Yet another blog</title>
+<author><name>Joe Sixpack</name></author>
+<id>urn:uuid:IGNORE</id>
+<updated>IGNORE</updated>
+
+<entry>
+<title type="html">foo</title>
+<id>urn:uuid:IGNORE</id>
+<updated>IGNORE</updated>
+<published>IGNORE</published>
+<link href="http://example.org/bar%20baz.html" />
+<content type="html">
+<p>bar</p>
+</content>
+</entry>
+
+<entry>
+<title type="html">a title with some nasty characters: &amp;&lt;&gt;&quot;'</title>
+<id>urn:uuid:IGNORE</id>
+<updated>IGNORE</updated>
+<published>IGNORE</published>
+<link href="http://example.org/foo.html" />
+<content type="html">
+<p>this text contains some special characters: '&quot;&gt;&lt;&amp;</p>
+<p>and more than one paragraph</p>
+</content>
+</entry>
+
+<entry>
+<title type="html">foo <em>bar</em> <strong>baz</strong></title>
+<id>urn:uuid:IGNORE</id>
+<updated>IGNORE</updated>
+<published>IGNORE</published>
+<link href="http://example.org/test.html" />
+<content type="html">
+<p>bar</p>
+</content>
+</entry>
+
+</feed>
\ No newline at end of file