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✏️ test_transformer.py

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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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✏️ test_transformer.py