Added PRESUBMIT.py for binary_size tools.

tools/binary_size/explain_binary_size_delta_unittest.py

Index: tools/binary_size/explain_binary_size_delta_unittest.py
diff --git a/tools/binary_size/explain_binary_size_delta_unittest.py b/tools/binary_size/explain_binary_size_delta_unittest.py
new file mode 100755
index 0000000000000000000000000000000000000000..6a004e25a6cd3d1a66968c8d217055c0a57801c6
--- /dev/null
+++ b/tools/binary_size/explain_binary_size_delta_unittest.py
@@ -0,0 +1,204 @@
+#!/usr/bin/env python
+# Copyright 2014 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.
+
+"""Check that explain_binary_size_delta seems to work."""
+
+import cStringIO
+import sys
+import unittest
+
+import explain_binary_size_delta
+
+
+class ExplainBinarySizeDeltaTest(unittest.TestCase):
+
+  def testCompare(self):
+    # List entries have form: symbol_name, symbol_type, symbol_size, file_path
+    symbol_list1 = (
+      # File with one symbol, left as-is.
+      ( 'unchanged', 't', 1000, '/file_unchanged' ),
+      # File with one symbol, changed.
+      ( 'changed', 't', 1000, '/file_all_changed' ),
+      # File with one symbol, deleted.
+      ( 'removed', 't', 1000, '/file_all_deleted' ),
+      # File with two symbols, one unchanged, one changed, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_changed' ),
+      ( 'changed', 't', 1000, '/file_pair_unchanged_changed' ),
+      # File with two symbols, one unchanged, one deleted, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_removed' ),
+      ( 'removed', 't', 1000, '/file_pair_unchanged_removed' ),
+      # File with two symbols, one unchanged, one added, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_added' ),
+      # File with two symbols, one unchanged, one changed, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_changed' ),
+      ( 'changed', '@', 1000, '/file_pair_unchanged_diffbuck_changed' ),
+      # File with two symbols, one unchanged, one deleted, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_removed' ),
+      ( 'removed', '@', 1000, '/file_pair_unchanged_diffbuck_removed' ),
+      # File with two symbols, one unchanged, one added, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_added' ),
+      # File with four symbols, one added, one removed,
+      # one changed, one unchanged
+      ( 'size_changed', 't', 1000, '/file_tetra' ),
+      ( 'removed', 't', 1000, '/file_tetra' ),
+      ( 'unchanged', 't', 1000, '/file_tetra' ),
+    )
+
+    symbol_list2 = (
+      # File with one symbol, left as-is.
+      ( 'unchanged', 't', 1000, '/file_unchanged' ),
+      # File with one symbol, changed.
+      ( 'changed', 't', 2000, '/file_all_changed' ),
+      # File with two symbols, one unchanged, one changed, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_changed' ),
+      ( 'changed', 't', 2000, '/file_pair_unchanged_changed' ),
+      # File with two symbols, one unchanged, one deleted, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_removed' ),
+      # File with two symbols, one unchanged, one added, same bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_added' ),
+      ( 'added', 't', 1000, '/file_pair_unchanged_added' ),
+      # File with two symbols, one unchanged, one changed, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_changed' ),
+      ( 'changed', '@', 2000, '/file_pair_unchanged_diffbuck_changed' ),
+      # File with two symbols, one unchanged, one deleted, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_removed' ),
+      # File with two symbols, one unchanged, one added, different bucket
+      ( 'unchanged', 't', 1000, '/file_pair_unchanged_diffbuck_added' ),
+      ( 'added', '@', 1000, '/file_pair_unchanged_diffbuck_added' ),
+      # File with four symbols, one added, one removed,
+      # one changed, one unchanged
+      ( 'size_changed', 't', 2000, '/file_tetra' ),
+      ( 'unchanged', 't', 1000, '/file_tetra' ),
+      ( 'added', 't', 1000, '/file_tetra' ),
+      # New file with one symbol added
+      ( 'added', 't', 1000, '/file_new' ),
+    )
+
+    # Here we go
+    (added, removed, changed, unchanged) = \
+        explain_binary_size_delta.Compare(symbol_list1, symbol_list2)
+
+    # File with one symbol, left as-is.
+    assert ('/file_unchanged', 't', 'unchanged', 1000, 1000) in unchanged
+    # File with one symbol, changed.
+    assert ('/file_all_changed', 't', 'changed', 1000, 2000) in changed
+    # File with one symbol, deleted.
+    assert ('/file_all_deleted', 't', 'removed', 1000, None) in removed
+    # New file with one symbol added
+    assert ('/file_new', 't', 'added', None, 1000) in added
+    # File with two symbols, one unchanged, one changed, same bucket
+    assert ('/file_pair_unchanged_changed',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_changed',
+            't', 'changed', 1000, 2000) in changed
+    # File with two symbols, one unchanged, one removed, same bucket
+    assert ('/file_pair_unchanged_removed',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_removed',
+            't', 'removed', 1000, None) in removed
+    # File with two symbols, one unchanged, one added, same bucket
+    assert ('/file_pair_unchanged_added',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_added',
+            't', 'added', None, 1000) in added
+    # File with two symbols, one unchanged, one changed, different bucket
+    assert ('/file_pair_unchanged_diffbuck_changed',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_diffbuck_changed',
+            '@', 'changed', 1000, 2000) in changed
+    # File with two symbols, one unchanged, one removed, different bucket
+    assert ('/file_pair_unchanged_diffbuck_removed',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_diffbuck_removed',
+            '@', 'removed', 1000, None) in removed
+    # File with two symbols, one unchanged, one added, different bucket
+    assert ('/file_pair_unchanged_diffbuck_added',
+            't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_pair_unchanged_diffbuck_added',
+            '@', 'added', None, 1000) in added
+    # File with four symbols, one added, one removed, one changed, one unchanged
+    assert ('/file_tetra', 't', 'size_changed', 1000, 2000) in changed
+    assert ('/file_tetra', 't', 'unchanged', 1000, 1000) in unchanged
+    assert ('/file_tetra', 't', 'added', None, 1000) in added
+    assert ('/file_tetra', 't', 'removed', 1000, None) in removed
+
+    # Now check final stats.
+    orig_stdout = sys.stdout
+    output_collector = cStringIO.StringIO()
+    sys.stdout = output_collector
+    try:
+      explain_binary_size_delta.CrunchStats(added, removed, changed,
+                                            unchanged, True, True)
+    finally:
+      sys.stdout = orig_stdout
+    result = output_collector.getvalue()
+
+    expected_output = """\
+Symbol statistics:
+  4 added, totalling 4000 bytes across 4 sources
+  4 removed, totalling 4000 bytes removed across 4 sources
+  4 changed, resulting in a net change of 4000 bytes \
+(4000 bytes before, 8000 bytes after) across 4 sources
+  8 unchanged, totalling 8000 bytes
+Source stats:
+  11 sources encountered.
+  1 completely new.
+  1 removed completely.
+  8 partially changed.
+  1 completely unchanged.
+Per-source Analysis:
+  Source: /file_all_changed
+    Change: 1000 bytes (gained 1000, lost 0)
+    Changed symbols:
+      changed type=t, delta=1000 bytes (was 1000 bytes, now 2000 bytes)
+  Source: /file_all_deleted
+    Change: -1000 bytes (gained 0, lost 1000)
+    Removed symbols:
+      removed type=t, size=1000 bytes
+  Source: /file_new
+    Change: 1000 bytes (gained 1000, lost 0)
+    New symbols:
+      added type=t, size=1000 bytes
+  Source: /file_pair_unchanged_added
+    Change: 1000 bytes (gained 1000, lost 0)
+    New symbols:
+      added type=t, size=1000 bytes
+  Source: /file_pair_unchanged_changed
+    Change: 1000 bytes (gained 1000, lost 0)
+    Changed symbols:
+      changed type=t, delta=1000 bytes (was 1000 bytes, now 2000 bytes)
+  Source: /file_pair_unchanged_diffbuck_added
+    Change: 1000 bytes (gained 1000, lost 0)
+    New symbols:
+      added type=@, size=1000 bytes
+  Source: /file_pair_unchanged_diffbuck_changed
+    Change: 1000 bytes (gained 1000, lost 0)
+    Changed symbols:
+      changed type=@, delta=1000 bytes (was 1000 bytes, now 2000 bytes)
+  Source: /file_pair_unchanged_diffbuck_removed
+    Change: -1000 bytes (gained 0, lost 1000)
+    Removed symbols:
+      removed type=@, size=1000 bytes
+  Source: /file_pair_unchanged_removed
+    Change: -1000 bytes (gained 0, lost 1000)
+    Removed symbols:
+      removed type=t, size=1000 bytes
+  Source: /file_tetra
+    Change: 1000 bytes (gained 2000, lost 1000)
+    New symbols:
+      added type=t, size=1000 bytes
+    Removed symbols:
+      removed type=t, size=1000 bytes
+    Changed symbols:
+      size_changed type=t, delta=1000 bytes (was 1000 bytes, now 2000 bytes)
+"""
+
+    self.maxDiff = None
+    self.assertMultiLineEqual(expected_output, result)
+    print "explain_binary_size_delta_unittest: All tests passed"
+
+
+if __name__ == '__main__':
+  unittest.main()