1#!/usr/bin/env python
2#
3# Copyright (C) 2013 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16#
17
18"""Unit tests for histogram.py."""
19
20# Disable check for function names to avoid errors based on old code
21# pylint: disable-msg=invalid-name
22
23from __future__ import absolute_import
24
25import unittest
26
27from update_payload import format_utils
28from update_payload import histogram
29
30
31class HistogramTest(unittest.TestCase):
32  """ Tests histogram"""
33
34  @staticmethod
35  def AddHumanReadableSize(size):
36    fmt = format_utils.BytesToHumanReadable(size)
37    return '%s (%s)' % (size, fmt) if fmt else str(size)
38
39  def CompareToExpectedDefault(self, actual_str):
40    expected_str = (
41        'Yes |################    | 5 (83.3%)\n'
42        'No  |###                 | 1 (16.6%)'
43    )
44    self.assertEqual(actual_str, expected_str)
45
46  def testExampleHistogram(self):
47    self.CompareToExpectedDefault(str(histogram.Histogram(
48        [('Yes', 5), ('No', 1)])))
49
50  def testFromCountDict(self):
51    self.CompareToExpectedDefault(str(histogram.Histogram.FromCountDict(
52        {'Yes': 5, 'No': 1})))
53
54  def testFromKeyList(self):
55    self.CompareToExpectedDefault(str(histogram.Histogram.FromKeyList(
56        ['Yes', 'Yes', 'No', 'Yes', 'Yes', 'Yes'])))
57
58  def testCustomScale(self):
59    expected_str = (
60        'Yes |#### | 5 (83.3%)\n'
61        'No  |     | 1 (16.6%)'
62    )
63    actual_str = str(histogram.Histogram([('Yes', 5), ('No', 1)], scale=5))
64    self.assertEqual(actual_str, expected_str)
65
66  def testCustomFormatter(self):
67    expected_str = (
68        'Yes |################    | 5000 (4.8 KiB) (83.3%)\n'
69        'No  |###                 | 1000 (16.6%)'
70    )
71    actual_str = str(histogram.Histogram(
72        [('Yes', 5000), ('No', 1000)], formatter=self.AddHumanReadableSize))
73    self.assertEqual(actual_str, expected_str)
74
75
76if __name__ == '__main__':
77  unittest.main()
78