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import unittest
import test.support
import io
import ast
import _ast
import unparse
forelse = """\
def f():
for x in range(10):
break
else:
y = 2
z = 3
"""
whileelse = """\
def g():
while True:
break
else:
y = 2
z = 3
"""
class UnparseTestCase(unittest.TestCase):
# Tests for specific bugs found in earlier versions of unparse
def check_roundtrip(self, code1, filename="internal"):
ast1 = compile(code1, filename, "exec", _ast.PyCF_ONLY_AST)
unparse_buffer = io.StringIO()
unparse.Unparser(ast1, unparse_buffer)
code2 = unparse_buffer.getvalue()
ast2 = compile(code2, filename, "exec", _ast.PyCF_ONLY_AST)
self.assertEqual(ast.dump(ast1), ast.dump(ast2))
def test_del_statement(self):
self.check_roundtrip("del x, y, z")
def test_shifts(self):
self.check_roundtrip("45 << 2")
self.check_roundtrip("13 >> 7")
def test_for_else(self):
self.check_roundtrip(forelse)
def test_while_else(self):
self.check_roundtrip(whileelse)
def test_unary_parens(self):
self.check_roundtrip("(-1)**7")
self.check_roundtrip("not True or False")
self.check_roundtrip("True or not False")
def test_main():
test.support.run_unittest(UnparseTestCase)
if __name__ == '__main__':
test_main()
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