# Copyright (c) 2017 Mark D. Hill and David A. Wood
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# met: redistributions of source code must retain the above copyright
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# redistributions in binary form must reproduce the above copyright
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# Authors: Sean Wilson

import testlib.helper as helper
import testlib.runner as runner_mod

class TestCase(object):
    '''
    Base class for all tests.

    ..note::
        The :func:`__new__` method enables collection of test cases, it must
        be called in order for test cases to be collected.
    '''
    fixtures = []

    # TODO, remove explicit dependency. Use the loader to set the
    # default runner
    runner = runner_mod.TestRunner
    collector = helper.InstanceCollector()

    def __new__(cls, *args, **kwargs):
        obj = super(TestCase, cls).__new__(cls)
        TestCase.collector.collect(obj)
        return obj

    def __init__(self, name=None, fixtures=tuple(), **kwargs):
        self.fixtures = self.fixtures + list(fixtures)
        if name is None:
            name = self.__class__.__name__
        self.name = name

class TestFunction(TestCase):
    '''
    TestCase implementation which uses a callable object as a test.
    '''
    def __init__(self, function, name=None, **kwargs):
        self.test_function = function
        if name is None:
            name = function.__name__
        TestCase.__init__(self, name=name, **kwargs)

    def test(self, *args, **kwargs):
        self.test_function(*args, **kwargs)