mirror of
https://github.com/python/cpython.git
synced 2025-10-31 05:31:20 +00:00
19f2aeba67
svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r86596 | ezio.melotti | 2010-11-20 21:04:17 +0200 (Sat, 20 Nov 2010) | 1 line #9424: Replace deprecated assert* methods in the Python test suite. ........
336 lines
12 KiB
Python
336 lines
12 KiB
Python
"""Test cases for traceback module"""
|
|
|
|
from _testcapi import traceback_print, exception_print
|
|
from io import StringIO
|
|
import sys
|
|
import unittest
|
|
import re
|
|
from test.support import run_unittest, Error, captured_output
|
|
from test.support import TESTFN, unlink
|
|
|
|
import traceback
|
|
|
|
|
|
class SyntaxTracebackCases(unittest.TestCase):
|
|
# For now, a very minimal set of tests. I want to be sure that
|
|
# formatting of SyntaxErrors works based on changes for 2.1.
|
|
|
|
def get_exception_format(self, func, exc):
|
|
try:
|
|
func()
|
|
except exc as value:
|
|
return traceback.format_exception_only(exc, value)
|
|
else:
|
|
raise ValueError("call did not raise exception")
|
|
|
|
def syntax_error_with_caret(self):
|
|
compile("def fact(x):\n\treturn x!\n", "?", "exec")
|
|
|
|
def syntax_error_with_caret_2(self):
|
|
compile("1 +\n", "?", "exec")
|
|
|
|
def syntax_error_bad_indentation(self):
|
|
compile("def spam():\n print(1)\n print(2)", "?", "exec")
|
|
|
|
def test_caret(self):
|
|
err = self.get_exception_format(self.syntax_error_with_caret,
|
|
SyntaxError)
|
|
self.assertEqual(len(err), 4)
|
|
self.assertTrue(err[1].strip() == "return x!")
|
|
self.assertIn("^", err[2]) # third line has caret
|
|
self.assertEqual(err[1].find("!"), err[2].find("^")) # in the right place
|
|
|
|
err = self.get_exception_format(self.syntax_error_with_caret_2,
|
|
SyntaxError)
|
|
self.assertIn("^", err[2]) # third line has caret
|
|
self.assertTrue(err[2].count('\n') == 1) # and no additional newline
|
|
self.assertTrue(err[1].find("+") == err[2].find("^")) # in the right place
|
|
|
|
def test_nocaret(self):
|
|
exc = SyntaxError("error", ("x.py", 23, None, "bad syntax"))
|
|
err = traceback.format_exception_only(SyntaxError, exc)
|
|
self.assertEqual(len(err), 3)
|
|
self.assertEqual(err[1].strip(), "bad syntax")
|
|
|
|
def test_bad_indentation(self):
|
|
err = self.get_exception_format(self.syntax_error_bad_indentation,
|
|
IndentationError)
|
|
self.assertEqual(len(err), 4)
|
|
self.assertEqual(err[1].strip(), "print(2)")
|
|
self.assertIn("^", err[2])
|
|
self.assertEqual(err[1].find(")"), err[2].find("^"))
|
|
|
|
def test_base_exception(self):
|
|
# Test that exceptions derived from BaseException are formatted right
|
|
e = KeyboardInterrupt()
|
|
lst = traceback.format_exception_only(e.__class__, e)
|
|
self.assertEqual(lst, ['KeyboardInterrupt\n'])
|
|
|
|
def test_format_exception_only_bad__str__(self):
|
|
class X(Exception):
|
|
def __str__(self):
|
|
1/0
|
|
err = traceback.format_exception_only(X, X())
|
|
self.assertEqual(len(err), 1)
|
|
str_value = '<unprintable %s object>' % X.__name__
|
|
if X.__module__ in ('__main__', 'builtins'):
|
|
str_name = X.__name__
|
|
else:
|
|
str_name = '.'.join([X.__module__, X.__name__])
|
|
self.assertEqual(err[0], "%s: %s\n" % (str_name, str_value))
|
|
|
|
def test_without_exception(self):
|
|
err = traceback.format_exception_only(None, None)
|
|
self.assertEqual(err, ['None\n'])
|
|
|
|
def test_encoded_file(self):
|
|
# Test that tracebacks are correctly printed for encoded source files:
|
|
# - correct line number (Issue2384)
|
|
# - respect file encoding (Issue3975)
|
|
import tempfile, sys, subprocess, os
|
|
|
|
# The spawned subprocess has its stdout redirected to a PIPE, and its
|
|
# encoding may be different from the current interpreter, on Windows
|
|
# at least.
|
|
process = subprocess.Popen([sys.executable, "-c",
|
|
"import sys; print(sys.stdout.encoding)"],
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.STDOUT)
|
|
stdout, stderr = process.communicate()
|
|
output_encoding = str(stdout, 'ascii').splitlines()[0]
|
|
|
|
def do_test(firstlines, message, charset, lineno):
|
|
# Raise the message in a subprocess, and catch the output
|
|
try:
|
|
output = open(TESTFN, "w", encoding=charset)
|
|
output.write("""{0}if 1:
|
|
import traceback;
|
|
raise RuntimeError('{1}')
|
|
""".format(firstlines, message))
|
|
output.close()
|
|
process = subprocess.Popen([sys.executable, TESTFN],
|
|
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
|
|
stdout, stderr = process.communicate()
|
|
stdout = stdout.decode(output_encoding).splitlines()
|
|
finally:
|
|
unlink(TESTFN)
|
|
|
|
# The source lines are encoded with the 'backslashreplace' handler
|
|
encoded_message = message.encode(output_encoding,
|
|
'backslashreplace')
|
|
# and we just decoded them with the output_encoding.
|
|
message_ascii = encoded_message.decode(output_encoding)
|
|
|
|
err_line = "raise RuntimeError('{0}')".format(message_ascii)
|
|
err_msg = "RuntimeError: {0}".format(message_ascii)
|
|
|
|
self.assertIn(("line %s" % lineno), stdout[1],
|
|
"Invalid line number: {0!r} instead of {1}".format(
|
|
stdout[1], lineno))
|
|
self.assertTrue(stdout[2].endswith(err_line),
|
|
"Invalid traceback line: {0!r} instead of {1!r}".format(
|
|
stdout[2], err_line))
|
|
self.assertTrue(stdout[3] == err_msg,
|
|
"Invalid error message: {0!r} instead of {1!r}".format(
|
|
stdout[3], err_msg))
|
|
|
|
do_test("", "foo", "ascii", 3)
|
|
for charset in ("ascii", "iso-8859-1", "utf-8", "GBK"):
|
|
if charset == "ascii":
|
|
text = "foo"
|
|
elif charset == "GBK":
|
|
text = "\u4E02\u5100"
|
|
else:
|
|
text = "h\xe9 ho"
|
|
do_test("# coding: {0}\n".format(charset),
|
|
text, charset, 4)
|
|
do_test("#!shebang\n# coding: {0}\n".format(charset),
|
|
text, charset, 5)
|
|
|
|
|
|
class TracebackFormatTests(unittest.TestCase):
|
|
|
|
def test_traceback_format(self):
|
|
try:
|
|
raise KeyError('blah')
|
|
except KeyError:
|
|
type_, value, tb = sys.exc_info()
|
|
traceback_fmt = 'Traceback (most recent call last):\n' + \
|
|
''.join(traceback.format_tb(tb))
|
|
file_ = StringIO()
|
|
traceback_print(tb, file_)
|
|
python_fmt = file_.getvalue()
|
|
else:
|
|
raise Error("unable to create test traceback string")
|
|
|
|
# Make sure that Python and the traceback module format the same thing
|
|
self.assertEqual(traceback_fmt, python_fmt)
|
|
|
|
# Make sure that the traceback is properly indented.
|
|
tb_lines = python_fmt.splitlines()
|
|
self.assertEqual(len(tb_lines), 3)
|
|
banner, location, source_line = tb_lines
|
|
self.assertTrue(banner.startswith('Traceback'))
|
|
self.assertTrue(location.startswith(' File'))
|
|
self.assertTrue(source_line.startswith(' raise'))
|
|
|
|
|
|
cause_message = (
|
|
"\nThe above exception was the direct cause "
|
|
"of the following exception:\n\n")
|
|
|
|
context_message = (
|
|
"\nDuring handling of the above exception, "
|
|
"another exception occurred:\n\n")
|
|
|
|
boundaries = re.compile(
|
|
'(%s|%s)' % (re.escape(cause_message), re.escape(context_message)))
|
|
|
|
|
|
class BaseExceptionReportingTests:
|
|
|
|
def get_exception(self, exception_or_callable):
|
|
if isinstance(exception_or_callable, Exception):
|
|
return exception_or_callable
|
|
try:
|
|
exception_or_callable()
|
|
except Exception as e:
|
|
return e
|
|
|
|
def zero_div(self):
|
|
1/0 # In zero_div
|
|
|
|
def check_zero_div(self, msg):
|
|
lines = msg.splitlines()
|
|
self.assertTrue(lines[-3].startswith(' File'))
|
|
self.assertIn('1/0 # In zero_div', lines[-2])
|
|
self.assertTrue(lines[-1].startswith('ZeroDivisionError'), lines[-1])
|
|
|
|
def test_simple(self):
|
|
try:
|
|
1/0 # Marker
|
|
except ZeroDivisionError as _:
|
|
e = _
|
|
lines = self.get_report(e).splitlines()
|
|
self.assertEqual(len(lines), 4)
|
|
self.assertTrue(lines[0].startswith('Traceback'))
|
|
self.assertTrue(lines[1].startswith(' File'))
|
|
self.assertIn('1/0 # Marker', lines[2])
|
|
self.assertTrue(lines[3].startswith('ZeroDivisionError'))
|
|
|
|
def test_cause(self):
|
|
def inner_raise():
|
|
try:
|
|
self.zero_div()
|
|
except ZeroDivisionError as e:
|
|
raise KeyError from e
|
|
def outer_raise():
|
|
inner_raise() # Marker
|
|
blocks = boundaries.split(self.get_report(outer_raise))
|
|
self.assertEqual(len(blocks), 3)
|
|
self.assertEqual(blocks[1], cause_message)
|
|
self.check_zero_div(blocks[0])
|
|
self.assertIn('inner_raise() # Marker', blocks[2])
|
|
|
|
def test_context(self):
|
|
def inner_raise():
|
|
try:
|
|
self.zero_div()
|
|
except ZeroDivisionError:
|
|
raise KeyError
|
|
def outer_raise():
|
|
inner_raise() # Marker
|
|
blocks = boundaries.split(self.get_report(outer_raise))
|
|
self.assertEqual(len(blocks), 3)
|
|
self.assertEqual(blocks[1], context_message)
|
|
self.check_zero_div(blocks[0])
|
|
self.assertIn('inner_raise() # Marker', blocks[2])
|
|
|
|
def test_cause_and_context(self):
|
|
# When both a cause and a context are set, only the cause should be
|
|
# displayed and the context should be muted.
|
|
def inner_raise():
|
|
try:
|
|
self.zero_div()
|
|
except ZeroDivisionError as _e:
|
|
e = _e
|
|
try:
|
|
xyzzy
|
|
except NameError:
|
|
raise KeyError from e
|
|
def outer_raise():
|
|
inner_raise() # Marker
|
|
blocks = boundaries.split(self.get_report(outer_raise))
|
|
self.assertEqual(len(blocks), 3)
|
|
self.assertEqual(blocks[1], cause_message)
|
|
self.check_zero_div(blocks[0])
|
|
self.assertIn('inner_raise() # Marker', blocks[2])
|
|
|
|
def test_cause_recursive(self):
|
|
def inner_raise():
|
|
try:
|
|
try:
|
|
self.zero_div()
|
|
except ZeroDivisionError as e:
|
|
z = e
|
|
raise KeyError from e
|
|
except KeyError as e:
|
|
raise z from e
|
|
def outer_raise():
|
|
inner_raise() # Marker
|
|
blocks = boundaries.split(self.get_report(outer_raise))
|
|
self.assertEqual(len(blocks), 3)
|
|
self.assertEqual(blocks[1], cause_message)
|
|
# The first block is the KeyError raised from the ZeroDivisionError
|
|
self.assertIn('raise KeyError from e', blocks[0])
|
|
self.assertNotIn('1/0', blocks[0])
|
|
# The second block (apart from the boundary) is the ZeroDivisionError
|
|
# re-raised from the KeyError
|
|
self.assertIn('inner_raise() # Marker', blocks[2])
|
|
self.check_zero_div(blocks[2])
|
|
|
|
def test_syntax_error_offset_at_eol(self):
|
|
# See #10186.
|
|
def e():
|
|
raise SyntaxError('', ('', 0, 5, 'hello'))
|
|
msg = self.get_report(e).splitlines()
|
|
self.assertEqual(msg[-2], " ^")
|
|
def e():
|
|
exec("x = 5 | 4 |")
|
|
msg = self.get_report(e).splitlines()
|
|
self.assertEqual(msg[-2], ' ^')
|
|
|
|
|
|
class PyExcReportingTests(BaseExceptionReportingTests, unittest.TestCase):
|
|
#
|
|
# This checks reporting through the 'traceback' module, with both
|
|
# format_exception() and print_exception().
|
|
#
|
|
|
|
def get_report(self, e):
|
|
e = self.get_exception(e)
|
|
s = ''.join(
|
|
traceback.format_exception(type(e), e, e.__traceback__))
|
|
with captured_output("stderr") as sio:
|
|
traceback.print_exception(type(e), e, e.__traceback__)
|
|
self.assertEqual(sio.getvalue(), s)
|
|
return s
|
|
|
|
|
|
class CExcReportingTests(BaseExceptionReportingTests, unittest.TestCase):
|
|
#
|
|
# This checks built-in reporting by the interpreter.
|
|
#
|
|
|
|
def get_report(self, e):
|
|
e = self.get_exception(e)
|
|
with captured_output("stderr") as s:
|
|
exception_print(e)
|
|
return s.getvalue()
|
|
|
|
|
|
def test_main():
|
|
run_unittest(__name__)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|