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Diffstat (limited to 'scripts/external_libs/python-daemon-2.0.5/test/scaffold.py')
| -rw-r--r-- | scripts/external_libs/python-daemon-2.0.5/test/scaffold.py | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/scripts/external_libs/python-daemon-2.0.5/test/scaffold.py b/scripts/external_libs/python-daemon-2.0.5/test/scaffold.py new file mode 100644 index 00000000..9a4f1150 --- /dev/null +++ b/scripts/external_libs/python-daemon-2.0.5/test/scaffold.py @@ -0,0 +1,322 @@ +# -*- coding: utf-8 -*- + +# test/scaffold.py +# Part of ‘python-daemon’, an implementation of PEP 3143. +# +# Copyright © 2007–2015 Ben Finney <ben+python@benfinney.id.au> +# +# This is free software: you may copy, modify, and/or distribute this work +# under the terms of the Apache License, version 2.0 as published by the +# Apache Software Foundation. +# No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details. + +""" Scaffolding for unit test modules. + """ + +from __future__ import (absolute_import, unicode_literals) + +import unittest +import doctest +import logging +import os +import sys +import operator +import textwrap +from copy import deepcopy +import functools + +try: + # Python 2 has both ‘str’ (bytes) and ‘unicode’ (text). + basestring = basestring + unicode = unicode +except NameError: + # Python 3 names the Unicode data type ‘str’. + basestring = str + unicode = str + +import testscenarios +import testtools.testcase + + +test_dir = os.path.dirname(os.path.abspath(__file__)) +parent_dir = os.path.dirname(test_dir) +if not test_dir in sys.path: + sys.path.insert(1, test_dir) +if not parent_dir in sys.path: + sys.path.insert(1, parent_dir) + +# Disable all but the most critical logging messages. +logging.disable(logging.CRITICAL) + + +def get_function_signature(func): + """ Get the function signature as a mapping of attributes. + + :param func: The function object to interrogate. + :return: A mapping of the components of a function signature. + + The signature is constructed as a mapping: + + * 'name': The function's defined name. + * 'arg_count': The number of arguments expected by the function. + * 'arg_names': A sequence of the argument names, as strings. + * 'arg_defaults': A sequence of the default values for the arguments. + * 'va_args': The name bound to remaining positional arguments. + * 'va_kw_args': The name bound to remaining keyword arguments. + + """ + try: + # Python 3 function attributes. + func_code = func.__code__ + func_defaults = func.__defaults__ + except AttributeError: + # Python 2 function attributes. + func_code = func.func_code + func_defaults = func.func_defaults + + arg_count = func_code.co_argcount + arg_names = func_code.co_varnames[:arg_count] + + arg_defaults = {} + if func_defaults is not None: + arg_defaults = dict( + (name, value) + for (name, value) in + zip(arg_names[::-1], func_defaults[::-1])) + + signature = { + 'name': func.__name__, + 'arg_count': arg_count, + 'arg_names': arg_names, + 'arg_defaults': arg_defaults, + } + + non_pos_names = list(func_code.co_varnames[arg_count:]) + COLLECTS_ARBITRARY_POSITIONAL_ARGS = 0x04 + if func_code.co_flags & COLLECTS_ARBITRARY_POSITIONAL_ARGS: + signature['var_args'] = non_pos_names.pop(0) + COLLECTS_ARBITRARY_KEYWORD_ARGS = 0x08 + if func_code.co_flags & COLLECTS_ARBITRARY_KEYWORD_ARGS: + signature['var_kw_args'] = non_pos_names.pop(0) + + return signature + + +def format_function_signature(func): + """ Format the function signature as printable text. + + :param func: The function object to interrogate. + :return: A formatted text representation of the function signature. + + The signature is rendered a text; for example:: + + foo(spam, eggs, ham=True, beans=None, *args, **kwargs) + + """ + signature = get_function_signature(func) + + args_text = [] + for arg_name in signature['arg_names']: + if arg_name in signature['arg_defaults']: + arg_text = "{name}={value!r}".format( + name=arg_name, value=signature['arg_defaults'][arg_name]) + else: + arg_text = "{name}".format( + name=arg_name) + args_text.append(arg_text) + if 'var_args' in signature: + args_text.append("*{var_args}".format(signature)) + if 'var_kw_args' in signature: + args_text.append("**{var_kw_args}".format(signature)) + signature_args_text = ", ".join(args_text) + + func_name = signature['name'] + signature_text = "{name}({args})".format( + name=func_name, args=signature_args_text) + + return signature_text + + +class TestCase(testtools.testcase.TestCase): + """ Test case behaviour. """ + + def failUnlessOutputCheckerMatch(self, want, got, msg=None): + """ Fail unless the specified string matches the expected. + + :param want: The desired output pattern. + :param got: The actual text to match. + :param msg: A message to prefix on the failure message. + :return: ``None``. + :raises self.failureException: If the text does not match. + + Fail the test unless ``want`` matches ``got``, as determined by + a ``doctest.OutputChecker`` instance. This is not an equality + check, but a pattern match according to the ``OutputChecker`` + rules. + + """ + checker = doctest.OutputChecker() + want = textwrap.dedent(want) + source = "" + example = doctest.Example(source, want) + got = textwrap.dedent(got) + checker_optionflags = functools.reduce(operator.or_, [ + doctest.ELLIPSIS, + ]) + if not checker.check_output(want, got, checker_optionflags): + if msg is None: + diff = checker.output_difference( + example, got, checker_optionflags) + msg = "\n".join([ + "Output received did not match expected output", + "{diff}", + ]).format( + diff=diff) + raise self.failureException(msg) + + assertOutputCheckerMatch = failUnlessOutputCheckerMatch + + def failUnlessFunctionInTraceback(self, traceback, function, msg=None): + """ Fail if the function is not in the traceback. + + :param traceback: The traceback object to interrogate. + :param function: The function object to match. + :param msg: A message to prefix on the failure message. + :return: ``None``. + + :raises self.failureException: If the function is not in the + traceback. + + Fail the test if the function ``function`` is not at any of the + levels in the traceback object ``traceback``. + + """ + func_in_traceback = False + expected_code = function.func_code + current_traceback = traceback + while current_traceback is not None: + if expected_code is current_traceback.tb_frame.f_code: + func_in_traceback = True + break + current_traceback = current_traceback.tb_next + + if not func_in_traceback: + if msg is None: + msg = ( + "Traceback did not lead to original function" + " {function}" + ).format( + function=function) + raise self.failureException(msg) + + assertFunctionInTraceback = failUnlessFunctionInTraceback + + def failUnlessFunctionSignatureMatch(self, first, second, msg=None): + """ Fail if the function signatures do not match. + + :param first: The first function to compare. + :param second: The second function to compare. + :param msg: A message to prefix to the failure message. + :return: ``None``. + + :raises self.failureException: If the function signatures do + not match. + + Fail the test if the function signature does not match between + the ``first`` function and the ``second`` function. + + The function signature includes: + + * function name, + + * count of named parameters, + + * sequence of named parameters, + + * default values of named parameters, + + * collector for arbitrary positional arguments, + + * collector for arbitrary keyword arguments. + + """ + first_signature = get_function_signature(first) + second_signature = get_function_signature(second) + + if first_signature != second_signature: + if msg is None: + first_signature_text = format_function_signature(first) + second_signature_text = format_function_signature(second) + msg = (textwrap.dedent("""\ + Function signatures do not match: + {first!r} != {second!r} + Expected: + {first_text} + Got: + {second_text}""") + ).format( + first=first_signature, + first_text=first_signature_text, + second=second_signature, + second_text=second_signature_text, + ) + raise self.failureException(msg) + + assertFunctionSignatureMatch = failUnlessFunctionSignatureMatch + + +class TestCaseWithScenarios(testscenarios.WithScenarios, TestCase): + """ Test cases run per scenario. """ + + +class Exception_TestCase(TestCaseWithScenarios): + """ Test cases for exception classes. """ + + def test_exception_instance(self): + """ Exception instance should be created. """ + self.assertIsNot(self.instance, None) + + def test_exception_types(self): + """ Exception instance should match expected types. """ + for match_type in self.types: + self.assertIsInstance(self.instance, match_type) + + +def make_exception_scenarios(scenarios): + """ Make test scenarios for exception classes. + + :param scenarios: Sequence of scenarios. + :return: List of scenarios with additional mapping entries. + + Use this with `testscenarios` to adapt `Exception_TestCase`_ for + any exceptions that need testing. + + Each scenario is a tuple (`name`, `map`) where `map` is a mapping + of attributes to be applied to each test case. Attributes map must + contain items for: + + :key exc_type: + The exception type to be tested. + :key min_args: + The minimum argument count for the exception instance + initialiser. + :key types: + Sequence of types that should be superclasses of each + instance of the exception type. + + """ + updated_scenarios = deepcopy(scenarios) + for (name, scenario) in updated_scenarios: + args = (None,) * scenario['min_args'] + scenario['args'] = args + instance = scenario['exc_type'](*args) + scenario['instance'] = instance + + return updated_scenarios + + +# Local variables: +# coding: utf-8 +# mode: python +# End: +# vim: fileencoding=utf-8 filetype=python : |