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