ext/testlib/test_util.py

   1 # Copyright (c) 2017 Mark D. Hill and David A. Wood
   2 # All rights reserved.
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions are
   6 # met: redistributions of source code must retain the above copyright
   7 # notice, this list of conditions and the following disclaimer;
   8 # redistributions in binary form must reproduce the above copyright
   9 # notice, this list of conditions and the following disclaimer in the
  10 # documentation and/or other materials provided with the distribution;
  11 # neither the name of the copyright holders nor the names of its
  12 # contributors may be used to endorse or promote products derived from
  13 # this software without specific prior written permission.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 #
  27 # Authors: Sean Wilson
  28
  29 import testlib.helper as helper
  30 import testlib.runner as runner_mod
  31
  32 class TestCase(object):
  33     '''
  34     Base class for all tests.
  35
  36     ..note::
  37         The :func:`__new__` method enables collection of test cases, it must
  38         be called in order for test cases to be collected.
  39     '''
  40     fixtures = []
  41
  42     # TODO, remove explicit dependency. Use the loader to set the
  43     # default runner
  44     runner = runner_mod.TestRunner
  45     collector = helper.InstanceCollector()
  46
  47     def __new__(cls, *args, **kwargs):
  48         obj = super(TestCase, cls).__new__(cls)
  49         TestCase.collector.collect(obj)
  50         return obj
  51
  52     def __init__(self, name=None, fixtures=tuple(), **kwargs):
  53         self.fixtures = self.fixtures + list(fixtures)
  54         if name is None:
  55             name = self.__class__.__name__
  56         self.name = name
  57
  58 class TestFunction(TestCase):
  59     '''
  60     TestCase implementation which uses a callable object as a test.
  61     '''
  62     def __init__(self, function, name=None, **kwargs):
  63         self.test_function = function
  64         if name is None:
  65             name = function.__name__
  66         TestCase.__init__(self, name=name, **kwargs)
  67
  68     def test(self, *args, **kwargs):
  69         self.test_function(*args, **kwargs)