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Metadata-Version: 1.1
Name: parameterized
Version: 0.6.1
Summary: Parameterized testing with any Python test framework
Home-page: https://github.com/wolever/parameterized
Author: David Wolever
Author-email: david@wolever.net
License: FreeBSD
Description-Content-Type: UNKNOWN
Description: Parameterized testing with any Python test framework
        ====================================================
        
        .. image:: https://travis-ci.org/wolever/parameterized.svg?branch=master
            :target: https://travis-ci.org/wolever/parameterized
        
        Parameterized testing in Python sucks.
        
        ``parameterized`` fixes that. For everything. Parameterized testing for nose,
        parameterized testing for py.test, parameterized testing for unittest.
        
        .. code:: python
        
            # test_math.py
            from nose.tools import assert_equal
            from parameterized import parameterized
        
            import unittest
            import math
        
            @parameterized([
                (2, 2, 4),
                (2, 3, 8),
                (1, 9, 1),
                (0, 9, 0),
            ])
            def test_pow(base, exponent, expected):
                assert_equal(math.pow(base, exponent), expected)
        
            class TestMathUnitTest(unittest.TestCase):
                @parameterized.expand([
                    ("negative", -1.5, -2.0),
                    ("integer", 1, 1.0),
                    ("large fraction", 1.6, 1),
                ])
                def test_floor(self, name, input, expected):
                    assert_equal(math.floor(input), expected)
        
        With nose (and nose2)::
        
            $ nosetests -v test_math.py
            test_math.test_pow(2, 2, 4) ... ok
            test_math.test_pow(2, 3, 8) ... ok
            test_math.test_pow(1, 9, 1) ... ok
            test_math.test_pow(0, 9, 0) ... ok
            test_floor_0_negative (test_math.TestMathUnitTest) ... ok
            test_floor_1_integer (test_math.TestMathUnitTest) ... ok
            test_floor_2_large_fraction (test_math.TestMathUnitTest) ... ok
        
            ----------------------------------------------------------------------
            Ran 7 tests in 0.002s
        
            OK
        
        As the package name suggests, nose is best supported and will be used for all
        further examples.
        
        With py.test (version 2.0 and above)::
        
            $ py.test -v test_math.py
            ============================== test session starts ==============================
            platform darwin -- Python 2.7.2 -- py-1.4.30 -- pytest-2.7.1
            collected 7 items
        
            test_math.py::test_pow::[0] PASSED
            test_math.py::test_pow::[1] PASSED
            test_math.py::test_pow::[2] PASSED
            test_math.py::test_pow::[3] PASSED
            test_math.py::TestMathUnitTest::test_floor_0_negative
            test_math.py::TestMathUnitTest::test_floor_1_integer
            test_math.py::TestMathUnitTest::test_floor_2_large_fraction
        
            =========================== 7 passed in 0.10 seconds ============================
        
        With unittest (and unittest2)::
        
            $ python -m unittest -v test_math
            test_floor_0_negative (test_math.TestMathUnitTest) ... ok
            test_floor_1_integer (test_math.TestMathUnitTest) ... ok
            test_floor_2_large_fraction (test_math.TestMathUnitTest) ... ok
        
            ----------------------------------------------------------------------
            Ran 3 tests in 0.000s
        
            OK
        
        (note: because unittest does not support test decorators, only tests created
        with ``@parameterized.expand`` will be executed)
        
        Installation
        ------------
        
        ::
        
            $ pip install parameterized
        
        
        Compatibility
        -------------
        
        `Yes`__.
        
        __ https://travis-ci.org/wolever/parameterized
        
        .. list-table::
           :header-rows: 1
           :stub-columns: 1
        
           * -
             - Py2.6
             - Py2.7
             - Py3.3
             - Py3.4
             - PyPy
           * - nose
             - yes
             - yes
             - yes
             - yes
             - yes
           * - nose2
             - yes
             - yes
             - yes
             - yes
             - yes
           * - py.test
             - yes
             - yes
             - yes
             - yes
             - yes
           * - | unittest
               | (``@parameterized.expand``)
             - yes
             - yes
             - yes
             - yes
             - yes
           * - | unittest2
               | (``@parameterized.expand``)
             - yes
             - yes
             - yes
             - yes
             - yes
        
        Dependencies
        ------------
        
        (this section left intentionally blank)
        
        
        Exhaustive Usage Examples
        --------------------------
        
        The ``@parameterized`` and ``@parameterized.expand`` decorators accept a list
        or iterable of tuples or ``param(...)``, or a callable which returns a list or
        iterable:
        
        .. code:: python
        
            from parameterized import parameterized, param
        
            # A list of tuples
            @parameterized([
                (2, 3, 5),
                (3, 5, 8),
            ])
            def test_add(a, b, expected):
                assert_equal(a + b, expected)
        
            # A list of params
            @parameterized([
                param("10", 10),
                param("10", 16, base=16),
            ])
            def test_int(str_val, expected, base=10):
                assert_equal(int(str_val, base=base), expected)
        
            # An iterable of params
            @parameterized(
                param.explicit(*json.loads(line))
                for line in open("testcases.jsons")
            )
            def test_from_json_file(...):
                ...
        
            # A callable which returns a list of tuples
            def load_test_cases():
                return [
                    ("test1", ),
                    ("test2", ),
                ]
            @parameterized(load_test_cases)
            def test_from_function(name):
                ...
        
        .. **
        
        Note that, when using an iterator or a generator, all the items will be loaded
        into memory before the start of the test run (we do this explicitly to ensure
        that generators are exhausted exactly once in multi-process or multi-threaded
        testing environments).
        
        The ``@parameterized`` decorator can be used test class methods, and standalone
        functions:
        
        .. code:: python
        
            from parameterized import parameterized
        
            class AddTest(object):
                @parameterized([
                    (2, 3, 5),
                ])
                def test_add(self, a, b, expected):
                    assert_equal(a + b, expected)
        
            @parameterized([
                (2, 3, 5),
            ])
            def test_add(a, b, expected):
                assert_equal(a + b, expected)
        
        
        And ``@parameterized.expand`` can be used to generate test methods in
        situations where test generators cannot be used (for example, when the test
        class is a subclass of ``unittest.TestCase``):
        
        .. code:: python
        
            import unittest
            from parameterized import parameterized
        
            class AddTestCase(unittest.TestCase):
                @parameterized.expand([
                    ("2 and 3", 2, 3, 5),
                    ("3 and 5", 2, 3, 5),
                ])
                def test_add(self, _, a, b, expected):
                    assert_equal(a + b, expected)
        
        Will create the test cases::
        
            $ nosetests example.py
            test_add_0_2_and_3 (example.AddTestCase) ... ok
            test_add_1_3_and_5 (example.AddTestCase) ... ok
        
            ----------------------------------------------------------------------
            Ran 2 tests in 0.001s
        
            OK
        
        Note that ``@parameterized.expand`` works by creating new methods on the test
        class. If the first parameter is a string, that string will be added to the end
        of the method name. For example, the test case above will generate the methods
        ``test_add_0_2_and_3`` and ``test_add_1_3_and_5``.
        
        The names of the test cases generated by ``@parameterized.expand`` can be
        customized using the ``testcase_func_name`` keyword argument. The value should
        be a function which accepts three arguments: ``testcase_func``, ``param_num``,
        and ``params``, and it should return the name of the test case.
        ``testcase_func`` will be the function to be tested, ``param_num`` will be the
        index of the test case parameters in the list of parameters, and ``param``
        (an instance of ``param``) will be the parameters which will be used.
        
        .. code:: python
        
            import unittest
            from parameterized import parameterized
        
            def custom_name_func(testcase_func, param_num, param):
                return "%s_%s" %(
                    testcase_func.__name__,
                    parameterized.to_safe_name("_".join(str(x) for x in param.args)),
                )
        
            class AddTestCase(unittest.TestCase):
                @parameterized.expand([
                    (2, 3, 5),
                    (2, 3, 5),
                ], testcase_func_name=custom_name_func)
                def test_add(self, a, b, expected):
                    assert_equal(a + b, expected)
        
        Will create the test cases::
        
            $ nosetests example.py
            test_add_1_2_3 (example.AddTestCase) ... ok
            test_add_2_3_5 (example.AddTestCase) ... ok
        
            ----------------------------------------------------------------------
            Ran 2 tests in 0.001s
        
            OK
        
        
        The ``param(...)`` helper class stores the parameters for one specific test
        case.  It can be used to pass keyword arguments to test cases:
        
        .. code:: python
        
            from parameterized import parameterized, param
        
            @parameterized([
                param("10", 10),
                param("10", 16, base=16),
            ])
            def test_int(str_val, expected, base=10):
                assert_equal(int(str_val, base=base), expected)
        
        
        If test cases have a docstring, the parameters for that test case will be
        appended to the first line of the docstring. This behavior can be controlled
        with the ``doc_func`` argument:
        
        .. code:: python
        
            from parameterized import parameterized
        
            @parameterized([
                (1, 2, 3),
                (4, 5, 9),
            ])
            def test_add(a, b, expected):
                """ Test addition. """
                assert_equal(a + b, expected)
        
            def my_doc_func(func, num, param):
                return "%s: %s with %s" %(num, func.__name__, param)
        
            @parameterized([
                (5, 4, 1),
                (9, 6, 3),
            ], doc_func=my_doc_func)
            def test_subtraction(a, b, expected):
                assert_equal(a - b, expected)
        
        ::
        
            $ nosetests example.py
            Test addition. [with a=1, b=2, expected=3] ... ok
            Test addition. [with a=4, b=5, expected=9] ... ok
            0: test_subtraction with param(*(5, 4, 1)) ... ok
            1: test_subtraction with param(*(9, 6, 3)) ... ok
        
            ----------------------------------------------------------------------
            Ran 4 tests in 0.001s
        
            OK
        
        
        Migrating from ``nose-parameterized`` to ``parameterized``
        ----------------------------------------------------------
        
        To migrate a codebase from ``nose-parameterized`` to ``parameterized``:
        
        1. Update your requirements file, replacing ``nose-parameterized`` with
           ``parameterized``.
        
        2. Replace all references to ``nose_parameterized`` with ``parameterized``::
        
            $ perl -pi -e 's/nose_parameterized/parameterized/g' your-codebase/
        
        3. You're done!
        
        
        FAQ
        ---
        
        What happened to ``nose-parameterized``?
            Originally only nose was supported. But now everything is supported, and it
            only made sense to change the name!
        
        What do you mean when you say "nose is best supported"?
            There are small caveates with ``py.test`` and ``unittest``: ``py.test``
            does not show the parameter values (ex, it will show ``test_add[0]``
            instead of ``test_add[1, 2, 3]``), and ``unittest``/``unittest2`` do not
            support test generators so ``@parameterized.expand`` must be used.
        
        Why not use ``@pytest.mark.parametrize``?
            Because spelling is difficult. Also, ``parameterized`` doesn't require you
            to repeat argument names, and (using ``param``) it supports optional
            keyword arguments.
        
        Why do I get an ``AttributeError: 'function' object has no attribute 'expand'`` with ``@parameterized.expand``?
            You've likely installed the ``parametrized`` (note the missing *e*)
            package. Use ``parameterized`` (with the *e*) instead and you'll be all
            set.
        
Platform: UNKNOWN
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: BSD License