mirror of https://github.com/python/cpython
237 lines
6.7 KiB
Python
237 lines
6.7 KiB
Python
"""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 __future__ import with_statement
|
|
|
|
# Testing imports
|
|
from . import support
|
|
from .support import driver, test_dir
|
|
from test.support import verbose
|
|
|
|
# Python imports
|
|
import os
|
|
import sys
|
|
import unittest
|
|
import warnings
|
|
import subprocess
|
|
|
|
# Local imports
|
|
from lib2to3.pgen2 import tokenize
|
|
from ..pgen2.parse import ParseError
|
|
from lib2to3.pygram import python_symbols as syms
|
|
|
|
|
|
class TestDriver(support.TestCase):
|
|
|
|
def test_formfeed(self):
|
|
s = """print 1\n\x0Cprint 2\n"""
|
|
t = driver.parse_string(s)
|
|
self.assertEqual(t.children[0].children[0].type, syms.print_stmt)
|
|
self.assertEqual(t.children[1].children[0].type, syms.print_stmt)
|
|
|
|
|
|
class GrammarTest(support.TestCase):
|
|
def validate(self, code):
|
|
support.parse_string(code)
|
|
|
|
def invalid_syntax(self, code):
|
|
try:
|
|
self.validate(code)
|
|
except ParseError:
|
|
pass
|
|
else:
|
|
raise AssertionError("Syntax shouldn't have been valid")
|
|
|
|
|
|
class TestRaiseChanges(GrammarTest):
|
|
def test_2x_style_1(self):
|
|
self.validate("raise")
|
|
|
|
def test_2x_style_2(self):
|
|
self.validate("raise E, V")
|
|
|
|
def test_2x_style_3(self):
|
|
self.validate("raise E, V, T")
|
|
|
|
def test_2x_style_invalid_1(self):
|
|
self.invalid_syntax("raise E, V, T, Z")
|
|
|
|
def test_3x_style(self):
|
|
self.validate("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")
|
|
|
|
|
|
# Adaptated from Python 3's Lib/test/test_grammar.py:GrammarTests.testFuncdef
|
|
class TestFunctionAnnotations(GrammarTest):
|
|
def test_1(self):
|
|
self.validate("""def f(x) -> list: pass""")
|
|
|
|
def test_2(self):
|
|
self.validate("""def f(x:int): pass""")
|
|
|
|
def test_3(self):
|
|
self.validate("""def f(*x:str): pass""")
|
|
|
|
def test_4(self):
|
|
self.validate("""def f(**x:float): pass""")
|
|
|
|
def test_5(self):
|
|
self.validate("""def f(x, y:1+2): pass""")
|
|
|
|
def test_6(self):
|
|
self.validate("""def f(a, (b:1, c:2, d)): pass""")
|
|
|
|
def test_7(self):
|
|
self.validate("""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.validate(s)
|
|
|
|
|
|
class TestExcept(GrammarTest):
|
|
def test_new(self):
|
|
s = """
|
|
try:
|
|
x
|
|
except E as N:
|
|
y"""
|
|
self.validate(s)
|
|
|
|
def test_old(self):
|
|
s = """
|
|
try:
|
|
x
|
|
except E, N:
|
|
y"""
|
|
self.validate(s)
|
|
|
|
|
|
# Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testAtoms
|
|
class TestSetLiteral(GrammarTest):
|
|
def test_1(self):
|
|
self.validate("""x = {'one'}""")
|
|
|
|
def test_2(self):
|
|
self.validate("""x = {'one', 1,}""")
|
|
|
|
def test_3(self):
|
|
self.validate("""x = {'one', 'two', 'three'}""")
|
|
|
|
def test_4(self):
|
|
self.validate("""x = {2, 3, 4,}""")
|
|
|
|
|
|
class TestNumericLiterals(GrammarTest):
|
|
def test_new_octal_notation(self):
|
|
self.validate("""0o7777777777777""")
|
|
self.invalid_syntax("""0o7324528887""")
|
|
|
|
def test_new_binary_notation(self):
|
|
self.validate("""0b101010""")
|
|
self.invalid_syntax("""0b0101021""")
|
|
|
|
|
|
class TestClassDef(GrammarTest):
|
|
def test_new_syntax(self):
|
|
self.validate("class B(t=7): pass")
|
|
self.validate("class B(t, *args): pass")
|
|
self.validate("class B(t, **kwargs): pass")
|
|
self.validate("class B(t, *args, **kwargs): pass")
|
|
self.validate("class B(t, y=9, *args, **kwargs): pass")
|
|
|
|
|
|
class TestParserIdempotency(support.TestCase):
|
|
|
|
"""A cut-down version of pytree_idempotency.py."""
|
|
|
|
# Issue 13125
|
|
@unittest.expectedFailure
|
|
def test_all_project_files(self):
|
|
for filepath in support.all_project_files():
|
|
with open(filepath, "rb") as fp:
|
|
encoding = tokenize.detect_encoding(fp.readline)[0]
|
|
self.assertIsNotNone(encoding,
|
|
"can't detect encoding for %s" % filepath)
|
|
with open(filepath, "r", encoding=encoding) as fp:
|
|
source = fp.read()
|
|
try:
|
|
tree = driver.parse_string(source)
|
|
except ParseError as err:
|
|
if verbose > 0:
|
|
warnings.warn('ParseError on file %s (%s)' % (filepath, err))
|
|
continue
|
|
new = str(tree)
|
|
x = diff(filepath, new)
|
|
if x:
|
|
self.fail("Idempotency failed: %s" % filepath)
|
|
|
|
def test_extended_unpacking(self):
|
|
driver.parse_string("a, *b, c = x\n")
|
|
driver.parse_string("[*a, b] = x\n")
|
|
driver.parse_string("(z, *y, w) = m\n")
|
|
driver.parse_string("for *z, m in d: pass\n")
|
|
|
|
|
|
class TestLiterals(GrammarTest):
|
|
|
|
def validate(self, s):
|
|
driver.parse_string(support.dedent(s) + "\n\n")
|
|
|
|
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")
|
|
"""
|
|
self.validate(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">
|
|
"""
|
|
'''
|
|
self.validate(s)
|
|
|
|
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")
|
|
"""
|
|
self.validate(s)
|
|
|
|
|
|
def diff(fn, result):
|
|
try:
|
|
with open('@', 'w') as f:
|
|
f.write(str(result))
|
|
fn = fn.replace('"', '\\"')
|
|
return subprocess.call(['diff', '-u', fn, '@'], stdout=(subprocess.DEVNULL if verbose < 1 else None))
|
|
finally:
|
|
try:
|
|
os.remove("@")
|
|
except OSError:
|
|
pass
|