supersize: Sort diffs by default

tools/binary_size/libsupersize/integration_test.py

 #!/usr/bin/env python
 # Copyright 2017 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import contextlib
 import copy
 import difflib
 import glob
 import itertools
@@ skipping 164 matching lines @@
   @_CompareWithGolden()
   def test_Diff_Basic(self):
     size_info1 = self._CloneSizeInfo(use_elf=False)
     size_info2 = self._CloneSizeInfo(use_elf=False)
     size_info1.metadata = {"foo": 1, "bar": [1,2,3], "baz": "yes"}
     size_info2.metadata = {"foo": 1, "bar": [1,3], "baz": "yes"}
     size_info1.symbols -= size_info1.symbols[:2]
     size_info2.symbols -= size_info2.symbols[-3:]
     size_info1.symbols[1].size -= 10
     d = diff.Diff(size_info1, size_info2)
+    d.symbols = d.symbols.Cluster().Sorted()
     return describe.GenerateLines(d, verbose=True)
 
   def test_Diff_Aliases1(self):
     size_info1 = self._CloneSizeInfo()
     size_info2 = self._CloneSizeInfo()
 
     # Removing 1 alias should not change the size.
     a1, _, _ = (
         size_info2.symbols.Filter(lambda s: s.num_aliases == 3)[0].aliases)
     size_info2.symbols -= [a1]
@@ skipping 55 matching lines @@
         models.Symbol(S, 55, name='.L__bar_1195', object_path='b'), # 5
     ]
     size_info2.symbols += [
         models.Symbol(S, 33, name='.L__unnamed_2195', object_path='b'), # 3
         models.Symbol(S, 11, name='.L__unnamed_2194', object_path='a'), # 1
         models.Symbol(S, 22, name='.L__unnamed_2193', object_path='a'), # 2
         models.Symbol(S, 44, name='.L__bar_2195', object_path='b'), # 4
         models.Symbol(S, 55, name='.L__bar_295', object_path='b'), # 5
     ]
     d = diff.Diff(size_info1, size_info2)
+    d.symbols = d.symbols.Cluster().Sorted()
     self.assertEquals(d.symbols.added_count, 0)
     self.assertEquals(d.symbols.size, 0)
 
 
   @_CompareWithGolden()
   def test_FullDescription(self):
     return describe.GenerateLines(self._CloneSizeInfo().Cluster(),
                                   recursive=True, verbose=True)
 
   @_CompareWithGolden()
@@ skipping 27 matching lines @@
     global update_goldens
     update_goldens = True
     for f in glob.glob(os.path.join(_TEST_DATA_DIR, '*.golden')):
       os.unlink(f)
 
   unittest.main(argv=argv, verbosity=2)
 
 
 if __name__ == '__main__':
   main()