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"""Test suite for 2to3's parser and grammar files.
This is the place to add tests for changes to 2to3's grammar, such as those
merging the grammars for Python 2 and 3. In addition to specific tests for
parts of the grammar we've changed, we also make sure we can parse the
test_grammar.py files from both Python 2 and Python 3.
"""
from textwrap import dedent
from jedi._compatibility import unicode, is_py3
from jedi.parser import Parser, load_grammar, ParseError
import pytest
from test.helpers import TestCase
def parse(code, version='3.4'):
code = dedent(code) + "\n\n"
grammar = load_grammar(version=version)
return Parser(grammar, unicode(code), 'file_input').get_parsed_node()
class TestDriver(TestCase):
def test_formfeed(self):
s = """print 1\n\x0Cprint 2\n"""
t = parse(s, '2.7')
self.assertEqual(t.children[0].children[0].type, 'print_stmt')
self.assertEqual(t.children[1].children[0].type, 'print_stmt')
s = """1\n\x0C\x0C2\n"""
t = parse(s, '2.7')
class GrammarTest(TestCase):
def invalid_syntax(self, code, **kwargs):
try:
parse(code, **kwargs)
except ParseError:
pass
else:
raise AssertionError("Syntax shouldn't have been valid")
class TestMatrixMultiplication(GrammarTest):
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
def test_matrix_multiplication_operator(self):
parse("a @ b", "3.5")
parse("a @= b", "3.5")
class TestYieldFrom(GrammarTest):
def test_yield_from(self):
parse("yield from x")
parse("(yield from x) + y")
self.invalid_syntax("yield from")
class TestAsyncAwait(GrammarTest):
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
def test_await_expr(self):
parse("""async def foo():
await x
""", "3.5")
parse("""async def foo():
def foo(): pass
def foo(): pass
await x
""", "3.5")
parse("""async def foo(): return await a""", "3.5")
parse("""def foo():
def foo(): pass
async def foo(): await x
""", "3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
@pytest.mark.xfail(reason="acting like python 3.7")
def test_await_expr_invalid(self):
self.invalid_syntax("await x", version="3.5")
self.invalid_syntax("""def foo():
await x""", version="3.5")
self.invalid_syntax("""def foo():
def foo(): pass
async def foo(): pass
await x
""", version="3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
@pytest.mark.xfail(reason="acting like python 3.7")
def test_async_var(self):
parse("""async = 1""", "3.5")
parse("""await = 1""", "3.5")
parse("""def async(): pass""", "3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
def test_async_for(self):
parse("""async def foo():
async for a in b: pass""", "3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
@pytest.mark.xfail(reason="acting like python 3.7")
def test_async_for_invalid(self):
self.invalid_syntax("""def foo():
async for a in b: pass""", version="3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
def test_async_with(self):
parse("""async def foo():
async with a: pass""", "3.5")
@pytest.mark.skipif('sys.version_info[:2] < (3, 5)')
@pytest.mark.xfail(reason="acting like python 3.7")
def test_async_with_invalid(self):
self.invalid_syntax("""def foo():
async with a: pass""", version="3.5")
class TestRaiseChanges(GrammarTest):
def test_2x_style_1(self):
parse("raise")
def test_2x_style_2(self):
parse("raise E, V", version='2.7')
def test_2x_style_3(self):
parse("raise E, V, T", version='2.7')
def test_2x_style_invalid_1(self):
self.invalid_syntax("raise E, V, T, Z", version='2.7')
def test_3x_style(self):
parse("raise E1 from E2")
def test_3x_style_invalid_1(self):
self.invalid_syntax("raise E, V from E1")
def test_3x_style_invalid_2(self):
self.invalid_syntax("raise E from E1, E2")
def test_3x_style_invalid_3(self):
self.invalid_syntax("raise from E1, E2")
def test_3x_style_invalid_4(self):
self.invalid_syntax("raise E from")
# Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testFuncdef
class TestFunctionAnnotations(GrammarTest):
def test_1(self):
parse("""def f(x) -> list: pass""")
def test_2(self):
parse("""def f(x:int): pass""")
def test_3(self):
parse("""def f(*x:str): pass""")
def test_4(self):
parse("""def f(**x:float): pass""")
def test_5(self):
parse("""def f(x, y:1+2): pass""")
def test_6(self):
self.invalid_syntax("""def f(a, (b:1, c:2, d)): pass""")
def test_7(self):
self.invalid_syntax("""def f(a, (b:1, c:2, d), e:3=4, f=5, *g:6): pass""")
def test_8(self):
s = """def f(a, (b:1, c:2, d), e:3=4, f=5,
*g:6, h:7, i=8, j:9=10, **k:11) -> 12: pass"""
self.invalid_syntax(s)
class TestExcept(GrammarTest):
def test_new(self):
s = """
try:
x
except E as N:
y"""
parse(s)
def test_old(self):
s = """
try:
x
except E, N:
y"""
parse(s, version='2.7')
# Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testAtoms
class TestSetLiteral(GrammarTest):
def test_1(self):
parse("""x = {'one'}""")
def test_2(self):
parse("""x = {'one', 1,}""")
def test_3(self):
parse("""x = {'one', 'two', 'three'}""")
def test_4(self):
parse("""x = {2, 3, 4,}""")
class TestNumericLiterals(GrammarTest):
def test_new_octal_notation(self):
code = """0o7777777777777"""
if is_py3:
parse(code)
else:
self.invalid_syntax(code)
self.invalid_syntax("""0o7324528887""")
def test_new_binary_notation(self):
parse("""0b101010""")
self.invalid_syntax("""0b0101021""")
class TestClassDef(GrammarTest):
def test_new_syntax(self):
parse("class B(t=7): pass")
parse("class B(t, *args): pass")
parse("class B(t, **kwargs): pass")
parse("class B(t, *args, **kwargs): pass")
parse("class B(t, y=9, *args, **kwargs): pass")
class TestParserIdempotency(TestCase):
"""A cut-down version of pytree_idempotency.py."""
def test_extended_unpacking(self):
parse("a, *b, c = x\n")
parse("[*a, b] = x\n")
parse("(z, *y, w) = m\n")
parse("for *z, m in d: pass\n")
class TestLiterals(GrammarTest):
# It's not possible to get the same result when using \xaa in Python 2/3,
# because it's treated differently.
@pytest.mark.skipif('sys.version_info[0] < 3')
def test_multiline_bytes_literals(self):
s = """
md5test(b"\xaa" * 80,
(b"Test Using Larger Than Block-Size Key "
b"and Larger Than One Block-Size Data"),
"6f630fad67cda0ee1fb1f562db3aa53e")
"""
parse(s)
def test_multiline_bytes_tripquote_literals(self):
s = '''
b"""
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN">
"""
'''
parse(s)
@pytest.mark.skipif('sys.version_info[0] < 3')
def test_multiline_str_literals(self):
s = """
md5test("\xaa" * 80,
("Test Using Larger Than Block-Size Key "
"and Larger Than One Block-Size Data"),
"6f630fad67cda0ee1fb1f562db3aa53e")
"""
parse(s)
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