fix minify, added tests

gluon/contrib/minify/minify.py

@@ -8,30 +8,40 @@ Created by: Ross Peoples <ross.peoples@gmail.com>
 Modified by: Massimo Di Pierro <massimo.dipierro@gmail.com>
 """
 
-import cssmin
-import jsmin
+from . import cssmin
+from . import jsmin
 import os
 import hashlib
 import re
+import sys
+PY2 = sys.version_info[0] == 2
 
+if PY2:
+    hashlib_md5 = hashlib.md5
+else:
+    hashlib_md5 = lambda s: hashlib.md5(bytes(s, 'utf8'))
+
+def open_py23(filename, mode):
+    if PY2:
+        f = open(filename, mode + 'b')
+    else:
+        f = open(filename, mode, encoding="utf8")
+    return f
 
 def read_binary_file(filename):
-    f = open(filename, 'rb')
+    f = open_py23(filename, 'r')
     data = f.read()
     f.close()
     return data
 
-
 def write_binary_file(filename, data):
-    f = open(filename, 'wb')
+    f = open_py23(filename, 'w')
     f.write(data)
     f.close()
 
-
 def fix_links(css, static_path):
     return re.sub(r'url\((["\'])\.\./', 'url(\\1' + static_path, css)
 
-
 def minify(files, path_info, folder, optimize_css, optimize_js,
            ignore_concat=[],
            ignore_minify=['/jquery.js', '/anytime.js']):
@@ -109,7 +119,7 @@ def minify(files, path_info, folder, optimize_css, optimize_js,
                     js.append(contents)
             else:
                 js.append(filename)
-    dest_key = hashlib.md5(repr(processed)).hexdigest()
+    dest_key = hashlib_md5(repr(processed)).hexdigest()
     if css and concat_css:
         css = '\n\n'.join(contents for contents in css)
         if not inline_css: