import unittest
from test import test_support
import textwrap
class ComplexArgsTestCase(unittest.TestCase):
def check(self, func, expected, *args):
self.assertEqual(func(*args), expected)
# These functions are tested below as lambdas too. If you add a
# function test, also add a similar lambda test.
# Functions are wrapped in "exec" statements in order to
# silence Py3k warnings.
def test_func_parens_no_unpacking(self):
exec textwrap.dedent("""
def f(((((x))))): return x
self.check(f, 1, 1)
# Inner parens are elided, same as: f(x,)
def f(((x)),): return x
self.check(f, 2, 2)
""")
def test_func_1(self):
exec textwrap.dedent("""
def f(((((x),)))): return x
self.check(f, 3, (3,))
def f(((((x)),))): return x
self.check(f, 4, (4,))
def f(((((x))),)): return x
self.check(f, 5, (5,))
def f(((x),)): return x
self.check(f, 6, (6,))
""")
def test_func_2(self):
exec textwrap.dedent("""
def f(((((x)),),)): return x
self.check(f, 2, ((2,),))
""")
def test_func_3(self):
exec textwrap.dedent("""
def f((((((x)),),),)): return x
self.check(f, 3, (((3,),),))
""")
def test_func_complex(self):
exec textwrap.dedent("""
def f((((((x)),),),), a, b, c): return x, a, b, c
self.check(f, (3, 9, 8, 7), (((3,),),), 9, 8, 7)
def f(((((((x)),)),),), a, b, c): return x, a, b, c
self.check(f, (3, 9, 8, 7), (((3,),),), 9, 8, 7)
def f(a, b, c, ((((((x)),)),),)): return a, b, c, x
self.check(f, (9, 8, 7, 3), 9, 8, 7, (((3,),),))
""")
# Duplicate the tests above, but for lambda. If you add a lambda test,
# also add a similar function test above.
def test_lambda_parens_no_unpacking(self):
exec textwrap.dedent("""
f = lambda (((((x))))): x
self.check(f, 1, 1)
# Inner parens are elided, same as: f(x,)
f = lambda ((x)),: x
self.check(f, 2, 2)
""")
def test_lambda_1(self):
exec textwrap.dedent("""
f = lambda (((((x),)))): x
self.check(f, 3, (3,))
f = lambda (((((x)),))): x
self.check(f, 4, (4,))
f = lambda (((((x))),)): x
self.check(f, 5, (5,))
f = lambda (((x),)): x
self.check(f, 6, (6,))
""")
def test_lambda_2(self):
exec textwrap.dedent("""
f = lambda (((((x)),),)): x
self.check(f, 2, ((2,),))
""")
def test_lambda_3(self):
exec textwrap.dedent("""
f = lambda ((((((x)),),),)): x
self.check(f, 3, (((3,),),))
""")
def test_lambda_complex(self):
exec textwrap.dedent("""
f = lambda (((((x)),),),), a, b, c: (x, a, b, c)
self.check(f, (3, 9, 8, 7), (((3,),),), 9, 8, 7)
f = lambda ((((((x)),)),),), a, b, c: (x, a, b, c)
self.check(f, (3, 9, 8, 7), (((3,),),), 9, 8, 7)
f = lambda a, b, c, ((((((x)),)),),): (a, b, c, x)
self.check(f, (9, 8, 7, 3), 9, 8, 7, (((3,),),))
""")
def test_main():
with test_support.check_py3k_warnings(
("tuple parameter unpacking has been removed", SyntaxWarning),
("parenthesized argument names are invalid", SyntaxWarning)):
test_support.run_unittest(ComplexArgsTestCase)
if __name__ == "__main__":
test_main()