mirror of
https://github.com/apple/swift.git
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4edb8d9baa
* Implemented a presets module which includes a more robust and easy to understand parser. Moved the swift-sdks migration code to a new migration module and added testing for both the presets and migration modules. Also converted build-script to use the new presets parser. * Switched the expansion algorithm to resolve mixins in-place (little known feature) and also changed the parser to skip all non-preset sections. Tests are included for these two behaviors. * Re-worked the presets error hierarchy to have more descriptive and information packed exception classes. Also re-worked the PresetParser to catch duplicate preset declarations and duplicate options in a single preset. There's some special shim-code to handle the disconnect between the Python 2 ConfigParser module and the Python 3 update which adds DuplicateOptionError.
91 lines
2.0 KiB
Python
91 lines
2.0 KiB
Python
# This source file is part of the Swift.org open source project
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#
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# Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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# Licensed under Apache License v2.0 with Runtime Library Exception
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#
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# See https://swift.org/LICENSE.txt for license information
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# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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try:
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from StringIO import StringIO
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except ImportError:
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from io import StringIO
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import os
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import sys
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import unittest
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from contextlib import contextmanager
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__all__ = [
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'add_metaclass',
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'redirect_stderr',
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'redirect_stdout',
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'TestCase',
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'UTILS_PATH',
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]
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UTILS_PATH = os.path.abspath(os.path.join(
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os.path.dirname(__file__),
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os.pardir,
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os.pardir,
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))
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# -----------------------------------------------------------------------------
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def add_metaclass(metacls):
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def wrapper(cls):
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body = vars(cls).copy()
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body.pop('__dict__', None)
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body.pop('__weakref__', None)
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return metacls(cls.__name__, cls.__bases__, body)
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return wrapper
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@contextmanager
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def redirect_stderr(stream=None):
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stream = stream or StringIO()
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old_stderr, sys.stderr = sys.stderr, stream
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try:
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yield stream
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finally:
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sys.stderr = old_stderr
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@contextmanager
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def redirect_stdout(stream=None):
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stream = stream or StringIO()
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old_stdout, sys.stdout = sys.stdout, stream
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try:
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yield stream
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finally:
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sys.stdout = old_stdout
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# -----------------------------------------------------------------------------
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class TestCase(unittest.TestCase):
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@contextmanager
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def quietOutput(self):
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with open(os.devnull, 'w') as devnull:
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with redirect_stderr(devnull), redirect_stdout(devnull):
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yield
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@contextmanager
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def assertNotRaises(self, exception=BaseException):
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assert issubclass(exception, BaseException)
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try:
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yield
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except exception as e:
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message = '{} raised: {}'.format(exception.__name__, str(e))
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raise self.failureException(message)
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