cpython/Lib/test/test_doctest2.py

"""A module to test whether doctest recognizes some 2.2 features,
like static and class methods.

>>> print('yup')  # 1
yup

We include some (random) encoded (utf-8) text in the text surrounding
the example.  It should be ignored:

ЉЊЈЁЂ

"""

import sys
import unittest
if sys.flags.optimize >= 2:
    raise unittest.SkipTest("Cannot test docstrings with -O2")

class C(object):
    """Class C.

    >>> print(C())  # 2
    42


    We include some (random) encoded (utf-8) text in the text surrounding
    the example.  It should be ignored:

        ЉЊЈЁЂ

    """

    def __init__(self):
        """C.__init__.

        >>> print(C()) # 3
        42
        """

    def __str__(self):
        """
        >>> print(C()) # 4
        42
        """
        return "42"

    class D(object):
        """A nested D class.

        >>> print("In D!")   # 5
        In D!
        """

        def nested(self):
            """
            >>> print(3) # 6
            3
            """

    def getx(self):
        """
        >>> c = C()    # 7
        >>> c.x = 12   # 8
        >>> print(c.x)  # 9
        -12
        """
        return -self._x

    def setx(self, value):
        """
        >>> c = C()     # 10
        >>> c.x = 12    # 11
        >>> print(c.x)   # 12
        -12
        """
        self._x = value

    x = property(getx, setx, doc="""\
        >>> c = C()    # 13
        >>> c.x = 12   # 14
        >>> print(c.x)  # 15
        -12
        """)

    @staticmethod
    def statm():
        """
        A static method.

        >>> print(C.statm())    # 16
        666
        >>> print(C().statm())  # 17
        666
        """
        return 666

    @classmethod
    def clsm(cls, val):
        """
        A class method.

        >>> print(C.clsm(22))    # 18
        22
        >>> print(C().clsm(23))  # 19
        23
        """
        return val


class Test(unittest.TestCase):
    def test_testmod(self):
        import doctest, sys
        EXPECTED = 19
        f, t = doctest.testmod(sys.modules[__name__])
        if f:
            self.fail("%d of %d doctests failed" % (f, t))
        if t != EXPECTED:
            self.fail("expected %d tests to run, not %d" % (EXPECTED, t))


# Pollute the namespace with a bunch of imported functions and classes,
# to make sure they don't get tested.
from doctest import *

if __name__ == '__main__':
    unittest.main()