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import pytest

def params(n):
    fn = range(n)
    return {'name': 'a', 'args': fn, 'ids': ['a: {}'.format(i) for i in fn]}

named_args = params(3)

@pytest.mark.parametrize(
        named_args['name'], named_args['args'], ids=named_args['ids'])

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# written in python2.7


def bad(n):
    if n == 1:
        raise ValueError('n is 1!')
    if n == 2:
        raise TypeError('n is 2!')
    return n, 2*n

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% Generate/verify memes in Prolog.


noun(apple).
noun(banana).
noun(orange).
noun(kiwifruit).

irregular_noun(kiwifruit, kiwifruit).

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import pytest

@pytest.mark.parametrize("input", "expected", [
    ("3+5", 8),
    ("2+4", 6),
    ])
def test_evalPassing(input, expected):
    assert eval(input) == expected

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def pytest_generate_tests(metafunc):
    """
    If the test_ fn has a idparametrize mark, use it to create parametrized
    tests with ids. Instead of giving a list of argvals (test values), it
    should be a dict of test id strings -> tuple of test values
    e.g.
    @py.test.mark.idparametrize(('a', 'b'), {
        'foo': (1, 2),
        'bar': (3, 4),
    })

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"""Public domain, yo.
See http://brianna.laugher.id.au/blog/79/the-progressive-speaking-stack-in-python for background.
"""

class Speaker:
    def __init__(self, name):
        self.name = name
        self._hasSpoken = False

    def __eq__(self, other):

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I/dalvikvm( 1836): Failed resolving Lorg/thoughtcrime/securesms/ConversationListFragment$1; interface 573 'Landroid/widget/SearchView$OnQueryTextListener;'
W/dalvikvm( 1836): Link of class 'Lorg/thoughtcrime/securesms/ConversationListFragment$1;' failed
E/dalvikvm( 1836): Could not find class 'org.thoughtcrime.securesms.ConversationListFragment$1', referenced from method org.thoughtcrime.securesms.ConversationListFragment.initializeSearch
W/dalvikvm( 1836): VFY: unable to resolve new-instance 1205 (Lorg/thoughtcrime/securesms/ConversationListFragment$1;) in Lorg/thoughtcrime/securesms/ConversationListFragment;
D/dalvikvm( 1836): VFY: replacing opcode 0x22 at 0x0000
D/dalvikvm( 1836): VFY: dead code 0x0002-0008 in Lorg/thoughtcrime/securesms/ConversationListFragment;.initializeSearch (Landroid/widget/SearchView;)V
E/dalvikvm( 1836): Could not find class 'android.widget.SearchView', referenced from method org.thoughtcrime.securesms.ConversationListFragment.onPrepareOptionsMenu
W/dalvikvm( 1836): VFY: unable to

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These are snippets of py.test in action, used in a talk given at 
PyCon AU 2012 in Hobart, Tasmania. They are all relevant for 
py.test 2.2 except where specified. Where taken from open source 
projects I have listed a URL, some examples are from the py.test 
documentation, some are from my workplace.

Apart from things called test_*, these functions should probably
be in your conftest.py, although they can generally start life in
your test files.