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57 lines
2.6 KiB
Python
57 lines
2.6 KiB
Python
import unittest
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from test import test_support
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from collections import NamedTuple
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class TestNamedTuple(unittest.TestCase):
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def test_factory(self):
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Point = NamedTuple('Point', 'x y')
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self.assertEqual(Point.__name__, 'Point')
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self.assertEqual(Point.__doc__, 'Point(x, y)')
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self.assertEqual(Point.__slots__, ())
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self.assertEqual(Point.__module__, __name__)
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self.assertEqual(Point.__getitem__, tuple.__getitem__)
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self.assert_('__getitem__' in Point.__dict__) # superclass methods localized
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def test_instance(self):
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Point = NamedTuple('Point', 'x y')
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p = Point(11, 22)
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self.assertEqual(p, Point(x=11, y=22))
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self.assertEqual(p, Point(11, y=22))
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self.assertEqual(p, Point(y=22, x=11))
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self.assertEqual(p, Point(*(11, 22)))
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self.assertEqual(p, Point(**dict(x=11, y=22)))
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self.assertRaises(TypeError, Point, 1) # too few args
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self.assertRaises(TypeError, Point, 1, 2, 3) # too many args
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self.assertRaises(TypeError, eval, 'Point(XXX=1, y=2)', locals()) # wrong keyword argument
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self.assertRaises(TypeError, eval, 'Point(x=1)', locals()) # missing keyword argument
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self.assertEqual(repr(p), 'Point(x=11, y=22)')
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self.assert_('__dict__' not in dir(p)) # verify instance has no dict
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self.assert_('__weakref__' not in dir(p))
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def test_tupleness(self):
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Point = NamedTuple('Point', 'x y')
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p = Point(11, 22)
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self.assert_(isinstance(p, tuple))
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self.assertEqual(p, (11, 22)) # matches a real tuple
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self.assertEqual(tuple(p), (11, 22)) # coercable to a real tuple
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self.assertEqual(list(p), [11, 22]) # coercable to a list
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self.assertEqual(max(p), 22) # iterable
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self.assertEqual(max(*p), 22) # star-able
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x, y = p
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self.assertEqual(p, (x, y)) # unpacks like a tuple
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self.assertEqual((p[0], p[1]), (11, 22)) # indexable like a tuple
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self.assertRaises(IndexError, p.__getitem__, 3)
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self.assertEqual(p.x, x)
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self.assertEqual(p.y, y)
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self.assertRaises(AttributeError, eval, 'p.z', locals())
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def test_main(verbose=None):
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test_classes = [TestNamedTuple]
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test_support.run_unittest(*test_classes)
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if __name__ == "__main__":
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test_main(verbose=True)
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