depot_tools: Separate TestCaseUtils into its own file.
This will make it easier to get rid of super_mox.py Bug: 984182 Change-Id: Ic6c9646b8a96ef05ac59293a62f68ad7db7dc2d0 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1754977 Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>changes/77/1754977/4
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# Copyright (c) 2019 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Simplify unit tests based on pymox."""
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from __future__ import print_function
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import os
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import random
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import string
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class TestCaseUtils(object):
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"""Base class with some additional functionalities. People will usually want
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to use SuperMoxTestBase instead."""
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# Backup the separator in case it gets mocked
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_OS_SEP = os.sep
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_RANDOM_CHOICE = random.choice
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_RANDOM_RANDINT = random.randint
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_STRING_LETTERS = string.ascii_letters
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## Some utilities for generating arbitrary arguments.
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def String(self, max_length):
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return ''.join([self._RANDOM_CHOICE(self._STRING_LETTERS)
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for _ in range(self._RANDOM_RANDINT(1, max_length))])
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def Strings(self, max_arg_count, max_arg_length):
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return [self.String(max_arg_length) for _ in range(max_arg_count)]
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def Args(self, max_arg_count=8, max_arg_length=16):
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return self.Strings(max_arg_count,
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self._RANDOM_RANDINT(1, max_arg_length))
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def _DirElts(self, max_elt_count=4, max_elt_length=8):
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return self._OS_SEP.join(self.Strings(max_elt_count, max_elt_length))
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def Dir(self, max_elt_count=4, max_elt_length=8):
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return (self._RANDOM_CHOICE((self._OS_SEP, '')) +
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self._DirElts(max_elt_count, max_elt_length))
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def RootDir(self, max_elt_count=4, max_elt_length=8):
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return self._OS_SEP + self._DirElts(max_elt_count, max_elt_length)
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def compareMembers(self, obj, members):
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"""If you add a member, be sure to add the relevant test!"""
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# Skip over members starting with '_' since they are usually not meant to
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# be for public use.
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actual_members = [x for x in sorted(dir(obj))
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if not x.startswith('_')]
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expected_members = sorted(members)
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if actual_members != expected_members:
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diff = ([i for i in actual_members if i not in expected_members] +
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[i for i in expected_members if i not in actual_members])
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print(diff, file=sys.stderr)
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# pylint: disable=no-member
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self.assertEqual(actual_members, expected_members)
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def setUp(self):
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self.root_dir = self.Dir()
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self.args = self.Args()
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self.relpath = self.String(200)
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