Merge dev-utils update_payload_library and the paycheck.

The update_payload library is a python library for parsing and
handling update payload. This library is used by the payload checker
python script also included here.

The code is merged from this repo:
  https://chromium.googlesource.com/chromiumos/platform/dev-util/

Bug: 28797993
TEST='import update_payload'

1 files changed, 60 insertions, 0 deletions

diff --git a/scripts/update_payload/histogram_unittest.py b/scripts/update_payload/histogram_unittest.py
new file mode 100755
index 00000000..421ff203
--- /dev/null
+++ b/scripts/update_payload/histogram_unittest.py
@@ -0,0 +1,60 @@
+#!/usr/bin/python
+#
+# Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Unit tests for histogram.py."""
+
+import unittest
+
+import format_utils
+import histogram
+
+
+class HistogramTest(unittest.TestCase):
+
+  @staticmethod
+  def AddHumanReadableSize(size):
+    fmt = format_utils.BytesToHumanReadable(size)
+    return '%s (%s)' % (size, fmt) if fmt else str(size)
+
+  def CompareToExpectedDefault(self, actual_str):
+    expected_str = (
+        'Yes |################    | 5 (83.3%)\n'
+        'No  |###                 | 1 (16.6%)'
+    )
+    self.assertEqual(actual_str, expected_str)
+
+  def testExampleHistogram(self):
+    self.CompareToExpectedDefault(str(histogram.Histogram(
+        [('Yes', 5), ('No', 1)])))
+
+  def testFromCountDict(self):
+    self.CompareToExpectedDefault(str(histogram.Histogram.FromCountDict(
+        {'Yes': 5, 'No': 1})))
+
+  def testFromKeyList(self):
+    self.CompareToExpectedDefault(str(histogram.Histogram.FromKeyList(
+        ['Yes', 'Yes', 'No', 'Yes', 'Yes', 'Yes'])))
+
+  def testCustomScale(self):
+    expected_str = (
+        'Yes |#### | 5 (83.3%)\n'
+        'No  |     | 1 (16.6%)'
+    )
+    actual_str = str(histogram.Histogram([('Yes', 5), ('No', 1)], scale=5))
+    self.assertEqual(actual_str, expected_str)
+
+  def testCustomFormatter(self):
+    expected_str = (
+        'Yes |################    | 5000 (4.8 KiB) (83.3%)\n'
+        'No  |###                 | 1000 (16.6%)'
+    )
+    actual_str = str(histogram.Histogram(
+        [('Yes', 5000), ('No', 1000)], formatter=self.AddHumanReadableSize))
+    self.assertEqual(actual_str, expected_str)
+
+
+if __name__ == '__main__':
+  unittest.main()