113 lines
3.8 KiB
Python
113 lines
3.8 KiB
Python
# Copyright (c) 2014, 2016 Google, Inc.
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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
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# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
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import unittest
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from astroid import builder
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from astroid import InferenceError
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from astroid import nodes
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from astroid import node_classes
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from astroid import util as astroid_util
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class InferenceUtil(unittest.TestCase):
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def test_not_exclusive(self):
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module = builder.parse("""
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x = 10
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for x in range(5):
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print (x)
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if x > 0:
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print ('#' * x)
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""", __name__, __file__)
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xass1 = module.locals['x'][0]
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assert xass1.lineno == 2
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xnames = [n for n in module.nodes_of_class(nodes.Name) if n.name == 'x']
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assert len(xnames) == 3
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assert xnames[1].lineno == 6
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self.assertEqual(node_classes.are_exclusive(xass1, xnames[1]), False)
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self.assertEqual(node_classes.are_exclusive(xass1, xnames[2]), False)
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def test_if(self):
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module = builder.parse('''
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if 1:
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a = 1
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a = 2
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elif 2:
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a = 12
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a = 13
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else:
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a = 3
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a = 4
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''')
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a1 = module.locals['a'][0]
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a2 = module.locals['a'][1]
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a3 = module.locals['a'][2]
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a4 = module.locals['a'][3]
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a5 = module.locals['a'][4]
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a6 = module.locals['a'][5]
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self.assertEqual(node_classes.are_exclusive(a1, a2), False)
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self.assertEqual(node_classes.are_exclusive(a1, a3), True)
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self.assertEqual(node_classes.are_exclusive(a1, a5), True)
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self.assertEqual(node_classes.are_exclusive(a3, a5), True)
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self.assertEqual(node_classes.are_exclusive(a3, a4), False)
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self.assertEqual(node_classes.are_exclusive(a5, a6), False)
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def test_try_except(self):
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module = builder.parse('''
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try:
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def exclusive_func2():
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"docstring"
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except TypeError:
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def exclusive_func2():
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"docstring"
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except:
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def exclusive_func2():
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"docstring"
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else:
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def exclusive_func2():
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"this one redefine the one defined line 42"
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''')
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f1 = module.locals['exclusive_func2'][0]
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f2 = module.locals['exclusive_func2'][1]
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f3 = module.locals['exclusive_func2'][2]
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f4 = module.locals['exclusive_func2'][3]
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self.assertEqual(node_classes.are_exclusive(f1, f2), True)
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self.assertEqual(node_classes.are_exclusive(f1, f3), True)
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self.assertEqual(node_classes.are_exclusive(f1, f4), False)
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self.assertEqual(node_classes.are_exclusive(f2, f4), True)
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self.assertEqual(node_classes.are_exclusive(f3, f4), True)
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self.assertEqual(node_classes.are_exclusive(f3, f2), True)
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self.assertEqual(node_classes.are_exclusive(f2, f1), True)
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self.assertEqual(node_classes.are_exclusive(f4, f1), False)
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self.assertEqual(node_classes.are_exclusive(f4, f2), True)
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def test_unpack_infer_uninferable_nodes(self):
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node = builder.extract_node('''
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x = [A] * 1
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f = [x, [A] * 2]
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f
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''')
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inferred = next(node.infer())
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unpacked = list(node_classes.unpack_infer(inferred))
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self.assertEqual(len(unpacked), 3)
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self.assertTrue(all(elt is astroid_util.Uninferable
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for elt in unpacked))
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def test_unpack_infer_empty_tuple(self):
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node = builder.extract_node('''
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()
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''')
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inferred = next(node.infer())
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with self.assertRaises(InferenceError):
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list(node_classes.unpack_infer(inferred))
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if __name__ == '__main__':
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unittest.main()
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