1 files changed, 62 insertions, 0 deletions
diff --git a/tests/udiffer.py b/tests/udiffer.py
new file mode 100755
index 0000000..6fb91be
--- /dev/null
+++ b/tests/udiffer.py
@@ -0,0 +1,62 @@
+#! /usr/bin/env python3
+#                          __  __            _
+#                       ___\ \/ /_ __   __ _| |_
+#                      / _ \\  /| '_ \ / _` | __|
+#                     |  __//  \| |_) | (_| | |_
+#                      \___/_/\_\ .__/ \__,_|\__|
+#                               |_| XML parser
+#
+# Copyright (c) 2017 Expat development team
+# Licensed under the MIT license:
+#
+# Permission is  hereby granted,  free of charge,  to any  person obtaining
+# a  copy  of  this  software   and  associated  documentation  files  (the
+# "Software"),  to  deal in  the  Software  without restriction,  including
+# without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+# distribute, sublicense, and/or sell copies of the Software, and to permit
+# persons  to whom  the Software  is  furnished to  do so,  subject to  the
+# following conditions:
+#
+# The above copyright  notice and this permission notice  shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+# EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+# NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+# DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+# USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import argparse
+import difflib
+import sys
+
+
+def _read_lines(filename):
+    try:
+        with open(filename) as f:
+            return f.readlines()
+    except UnicodeDecodeError:
+        with open(filename, encoding='utf_16') as f:
+            return f.readlines()
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('first', metavar='FILE')
+    parser.add_argument('second', metavar='FILE')
+    config = parser.parse_args()
+
+    first = _read_lines(config.first)
+    second = _read_lines(config.second)
+
+    diffs = list(difflib.unified_diff(first, second, fromfile=config.first,
+                                      tofile=config.second))
+    if diffs:
+        sys.stdout.writelines(diffs)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()