Refactor infra git libs and testing.

infra/services/gnumbd/test/util_test.py

-# 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.
-
-import unittest
-import textwrap
-import collections
-
-from infra.services.gnumbd.support import util
-
-
-class TestCalledProcessError(unittest.TestCase):
-  def testBasic(self):
-    cpe = util.CalledProcessError(100, ('cat', 'dog'), None, None)
-    self.assertEqual(
-        str(cpe), "Command ('cat', 'dog') returned non-zero exit status 100.\n")
-
-  def testErr(self):
-    cpe = util.CalledProcessError(
-        100, ('cat', 'dog'), None,
-        'Cat says the dog smells funny.\nCat is not amused.')
-
-    self.assertEqual(str(cpe), textwrap.dedent('''\
-    Command ('cat', 'dog') returned non-zero exit status 100:
-    STDERR ========================================
-      Cat says the dog smells funny.
-      Cat is not amused.
-    '''))
-
-  def testOut(self):
-    cpe = util.CalledProcessError(
-        100, ('cat', 'dog'),
-        'This totally worked! Squirrels are awesome!',
-        '')
-
-    self.assertEqual(str(cpe), textwrap.dedent('''\
-    Command ('cat', 'dog') returned non-zero exit status 100:
-    STDOUT ========================================
-      This totally worked! Squirrels are awesome!
-    '''))
-
-  def testBoth(self):
-    cpe = util.CalledProcessError(
-        100, ('cat', 'dog'),
-        'This totally worked! Squirrels are awesome!',
-        'Cat says the dog smells funny.\nCat is not amused.')
-
-    self.assertEqual(str(cpe), textwrap.dedent('''\
-    Command ('cat', 'dog') returned non-zero exit status 100:
-    STDOUT ========================================
-      This totally worked! Squirrels are awesome!
-    STDERR ========================================
-      Cat says the dog smells funny.
-      Cat is not amused.
-    '''))
-
-
-class TestCachedProperty(unittest.TestCase):
-  def setUp(self):
-    self.calls = calls = []
-    class Foo(object):
-      def __init__(self, success=True, override=None):
-        self.success = success
-        self.override = override
-
-      @util.cached_property
-      def happy(self):
-        calls.append(1)
-        if self.override is not None:
-          self._happy = self.override  # pylint: disable=W0201
-        if not self.success:
-          raise Exception('nope')
-        return 'days'
-    self.Foo = Foo
-
-  def testBasic(self):
-    f = self.Foo()
-    self.assertEqual(f.happy, 'days')
-    self.assertEqual(f.happy, 'days')
-    self.assertEqual(sum(self.calls), 1)
-
-  def testBareReturnsSelf(self):
-    self.assertIsInstance(self.Foo.happy, util.cached_property)
-
-  def testOverride(self):
-    f = self.Foo(override='cowabunga!')
-    self.assertEqual(f.happy, 'cowabunga!')
-    self.assertEqual(f.happy, 'cowabunga!')
-    self.assertEqual(sum(self.calls), 1)
-
-  def testNoCache(self):
-    f = self.Foo(False)
-    with self.assertRaises(Exception):
-      f.happy  # pylint: disable=W0104
-    f.success = True
-    self.assertEqual(f.happy, 'days')
-    self.assertEqual(sum(self.calls), 2)
-
-  def testDel(self):
-    f = self.Foo()
-    self.assertEqual(f.happy, 'days')
-    self.assertEqual(f.happy, 'days')
-    del f.happy
-    self.assertEqual(f.happy, 'days')
-    del f.happy
-    del f.happy
-    self.assertEqual(f.happy, 'days')
-    self.assertEqual(sum(self.calls), 3)
-
-
-class TestFreeze(unittest.TestCase):
-  def testDict(self):
-    d = collections.OrderedDict()
-    d['cat'] = 100
-    d['dog'] = 0
-
-    f = util.freeze(d)
-    self.assertEqual(d, f)
-    self.assertIsInstance(f, util.FrozenDict)
-    self.assertEqual(
-        hash(f),
-        hash((0, ('cat', 100))) ^ hash((1, ('dog', 0)))
-    )
-    self.assertEqual(len(d), len(f))
-
-    # Cover equality
-    self.assertEqual(f, f)
-    self.assertNotEqual(f, 'dog')
-    self.assertNotEqual(f, {'bob': 'hat'})
-    self.assertNotEqual(f, {'cat': 20, 'dog': 10})
-
-  def testList(self):
-    l = [1, 2, {'bob': 100}]
-    f = util.freeze(l)
-    self.assertSequenceEqual(l, f)
-    self.assertIsInstance(f, tuple)
-
-  def testSet(self):
-    s = {1, 2, util.freeze({'bob': 100})}
-    f = util.freeze(s)
-    self.assertEqual(s, f)
-    self.assertIsInstance(f, frozenset)
-
-
-class TestThaw(unittest.TestCase):
-  def testDict(self):
-    d = collections.OrderedDict()
-    d['cat'] = 100
-    d['dog'] = 0
-    f = util.freeze(d)
-    t = util.thaw(f)
-    self.assertEqual(d, f)
-    self.assertEqual(t, f)
-    self.assertEqual(d, t)
-    self.assertIsInstance(t, collections.OrderedDict)
-
-  def testList(self):
-    l = [1, 2, {'bob': 100}]
-    f = util.freeze(l)
-    t = util.thaw(f)
-    self.assertSequenceEqual(l, f)
-    self.assertSequenceEqual(f, t)
-    self.assertSequenceEqual(l, t)
-    self.assertIsInstance(t, list)
-
-  def testSet(self):
-    s = {1, 2, 'cat'}
-    f = util.freeze(s)
-    t = util.thaw(f)
-    self.assertEqual(s, f)
-    self.assertEqual(f, t)
-    self.assertEqual(t, s)
-    self.assertIsInstance(t, set)