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Viewing changes to Lib/test/test_property.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-03-23 00:01:27 UTC
  • Revision ID: james.westby@ubuntu.com-20090323000127-5fstfxju4ufrhthq
Tags: upstream-3.1~a1+20090322
Import upstream version 3.1~a1+20090322

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Lib/test/test_property.py
 
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# Test case for property
 
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# more tests are in test_descr
 
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import unittest
 
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from test.support import run_unittest
 
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class PropertyBase(Exception):
 
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    pass
 
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class PropertyGet(PropertyBase):
 
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    pass
 
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class PropertySet(PropertyBase):
 
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    pass
 
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class PropertyDel(PropertyBase):
 
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    pass
 
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class BaseClass(object):
 
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    def __init__(self):
 
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        self._spam = 5
 
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    @property
 
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    def spam(self):
 
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        """BaseClass.getter"""
 
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        return self._spam
 
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    @spam.setter
 
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    def spam(self, value):
 
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        self._spam = value
 
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    @spam.deleter
 
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    def spam(self):
 
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        del self._spam
 
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class SubClass(BaseClass):
 
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    @BaseClass.spam.getter
 
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    def spam(self):
 
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        """SubClass.getter"""
 
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        raise PropertyGet(self._spam)
 
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    @spam.setter
 
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    def spam(self, value):
 
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        raise PropertySet(self._spam)
 
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    @spam.deleter
 
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    def spam(self):
 
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        raise PropertyDel(self._spam)
 
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class PropertyDocBase(object):
 
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    _spam = 1
 
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    def _get_spam(self):
 
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        return self._spam
 
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    spam = property(_get_spam, doc="spam spam spam")
 
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class PropertyDocSub(PropertyDocBase):
 
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    @PropertyDocBase.spam.getter
 
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    def spam(self):
 
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        """The decorator does not use this doc string"""
 
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        return self._spam
 
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class PropertyTests(unittest.TestCase):
 
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    def test_property_decorator_baseclass(self):
 
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        # see #1620
 
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        base = BaseClass()
 
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        self.assertEqual(base.spam, 5)
 
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        self.assertEqual(base._spam, 5)
 
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        base.spam = 10
 
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        self.assertEqual(base.spam, 10)
 
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        self.assertEqual(base._spam, 10)
 
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        delattr(base, "spam")
 
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        self.assert_(not hasattr(base, "spam"))
 
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        self.assert_(not hasattr(base, "_spam"))
 
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        base.spam = 20
 
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        self.assertEqual(base.spam, 20)
 
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        self.assertEqual(base._spam, 20)
 
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        self.assertEqual(base.__class__.spam.__doc__, "BaseClass.getter")
 
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    def test_property_decorator_subclass(self):
 
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        # see #1620
 
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        sub = SubClass()
 
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        self.assertRaises(PropertyGet, getattr, sub, "spam")
 
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        self.assertRaises(PropertySet, setattr, sub, "spam", None)
 
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        self.assertRaises(PropertyDel, delattr, sub, "spam")
 
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        self.assertEqual(sub.__class__.spam.__doc__, "SubClass.getter")
 
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    def test_property_decorator_doc(self):
 
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        base = PropertyDocBase()
 
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        sub = PropertyDocSub()
 
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        self.assertEqual(base.__class__.spam.__doc__, "spam spam spam")
 
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        self.assertEqual(sub.__class__.spam.__doc__, "spam spam spam")
 
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def test_main():
 
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    run_unittest(PropertyTests)
 
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if __name__ == '__main__':
 
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    test_main()