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bpo-40334: Improve column offsets for thrown syntax errors by Pegen (GH-19782)

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Batuhan Taskaya 2020-05-01 16:13:43 +03:00 • committed by GitHub
parent 719e14d283
commit 76c1b4d5c5
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6 changed files with 80 additions and 112 deletions
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42
Lib/test/test_exceptions.py
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@ -178,19 +178,19 @@ class ExceptionTests(unittest.TestCase):
s = '''if True:\n print()\n\texec "mixed tabs and spaces"'''
ckmsg(s, "inconsistent use of tabs and spaces in indentation", TabError)
@support.skip_if_new_parser("Pegen column offsets might be different")
def testSyntaxErrorOffset(self):
def check(src, lineno, offset, encoding='utf-8'):
with self.assertRaises(SyntaxError) as cm:
compile(src, '<fragment>', 'exec')
self.assertEqual(cm.exception.lineno, lineno)
self.assertEqual(cm.exception.offset, offset)
if cm.exception.text is not None:
if not isinstance(src, str):
src = src.decode(encoding, 'replace')
line = src.split('\n')[lineno-1]
self.assertIn(line, cm.exception.text)
def check(self, src, lineno, offset, encoding='utf-8'):
with self.assertRaises(SyntaxError) as cm:
compile(src, '<fragment>', 'exec')
self.assertEqual(cm.exception.lineno, lineno)
self.assertEqual(cm.exception.offset, offset)
if cm.exception.text is not None:
if not isinstance(src, str):
src = src.decode(encoding, 'replace')
line = src.split('\n')[lineno-1]
self.assertIn(line, cm.exception.text)
def testSyntaxErrorOffset(self):
check = self.check
check('def fact(x):\n\treturn x!\n', 2, 10)
check('1 +\n', 1, 4)
check('def spam():\n print(1)\n print(2)', 3, 10)
@ -238,20 +238,20 @@ class ExceptionTests(unittest.TestCase):
check('nonlocal x', 1, 1)
check('def f():\n global x\n nonlocal x', 2, 3)
# Errors thrown by ast.c
check('for 1 in []: pass', 1, 5)
check('def f(*):\n pass', 1, 7)
check('[*x for x in xs]', 1, 2)
check('def f():\n x, y: int', 2, 3)
check('(yield i) = 2', 1, 1)
check('foo(x for x in range(10), 100)', 1, 5)
check('foo(1=2)', 1, 5)
# Errors thrown by future.c
check('from __future__ import doesnt_exist', 1, 1)
check('from __future__ import braces', 1, 1)
check('x=1\nfrom __future__ import division', 2, 1)
@support.skip_if_new_parser("Pegen column offsets might be different")
def testSyntaxErrorOffsetCustom(self):
self.check('for 1 in []: pass', 1, 5)
self.check('def f(*):\n pass', 1, 7)
self.check('[*x for x in xs]', 1, 2)
self.check('def f():\n x, y: int', 2, 3)
self.check('(yield i) = 2', 1, 1)
self.check('foo(x for x in range(10), 100)', 1, 5)
self.check('foo(1=2)', 1, 5)
@cpython_only
def testSettingException(self):