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https://github.com/python/cpython
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Tip revision: 7a41638b5b183d0b9b27449d502d0a15001134ee authored by Benjamin Peterson on 04 April 2020, 16:54:14 UTC
Bump version to 2.7.18rc1.
Tip revision: 7a41638
test_transformer.py
import unittest
from test import test_support

# Silence Py3k warning
test_support.import_module('compiler', deprecated=True)
from compiler import transformer, ast
from compiler import compile

class Tests(unittest.TestCase):

    def testMultipleLHS(self):
        """ Test multiple targets on the left hand side. """

        snippets = ['a, b = 1, 2',
                    '(a, b) = 1, 2',
                    '((a, b), c) = (1, 2), 3']

        for s in snippets:
            a = transformer.parse(s)
            self.assertIsInstance(a, ast.Module)
            child1 = a.getChildNodes()[0]
            self.assertIsInstance(child1, ast.Stmt)
            child2 = child1.getChildNodes()[0]
            self.assertIsInstance(child2, ast.Assign)

            # This actually tests the compiler, but it's a way to assure the ast
            # is correct
            c = compile(s, '<string>', 'single')
            vals = {}
            exec c in vals
            assert vals['a'] == 1
            assert vals['b'] == 2

def test_main():
    test_support.run_unittest(Tests)

if __name__ == "__main__":
    test_main()
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