Mercurial > public > mercurial-scm > hg-stable
comparison tests/logexceptions.py @ 35201:bd8875b6473c
run-tests: mechanism to report exceptions during test execution
Sometimes when running tests you introduce a ton of exceptions.
The most extreme example of this is running Mercurial with Python 3,
which currently spews thousands of exceptions when running the test
harness.
This commit adds an opt-in feature to run-tests.py to aggregate
exceptions encountered by `hg` when running tests.
When --exceptions is used, the test harness enables the
"logexceptions" extension in the test environment. This extension
wraps the Mercurial function to handle exceptions and writes
information about the exception to a random filename in a directory
defined by the test harness via an environment variable. At the
end of the test harness, these files are parsed, aggregated, and
a list of all unique Mercurial frames triggering exceptions is
printed in order of frequency.
This feature is intended to aid Python 3 development. I've only
really tested it on Python 3. There is no shortage of improvements
that could be made. e.g. we could write a separate file containing
the exception report - maybe even an HTML report. We also don't
capture which tests demonstrate the exceptions, so there's no turnkey
way to test whether a code change made an exception disappear.
Perfect is the enemy of good. I think the current patch is useful
enough to land. Whoever uses it can send patches to imprve its
usefulness.
Differential Revision: https://phab.mercurial-scm.org/D1477
| author | Gregory Szorc <gregory.szorc@gmail.com> |
|---|---|
| date | Mon, 20 Nov 2017 23:02:32 -0800 |
| parents | |
| children | 8de90e006c78 |
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| 35200:073843b5e353 | 35201:bd8875b6473c |
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| 1 # logexceptions.py - Write files containing info about Mercurial exceptions | |
| 2 # | |
| 3 # Copyright 2017 Matt Mackall <mpm@selenic.com> | |
| 4 # | |
| 5 # This software may be used and distributed according to the terms of the | |
| 6 # GNU General Public License version 2 or any later version. | |
| 7 | |
| 8 from __future__ import absolute_import | |
| 9 | |
| 10 import inspect | |
| 11 import os | |
| 12 import sys | |
| 13 import traceback | |
| 14 import uuid | |
| 15 | |
| 16 from mercurial import ( | |
| 17 dispatch, | |
| 18 extensions, | |
| 19 ) | |
| 20 | |
| 21 def handleexception(orig, ui): | |
| 22 res = orig(ui) | |
| 23 | |
| 24 if not ui.environ.get(b'HGEXCEPTIONSDIR'): | |
| 25 return res | |
| 26 | |
| 27 dest = os.path.join(ui.environ[b'HGEXCEPTIONSDIR'], | |
| 28 str(uuid.uuid4()).encode('ascii')) | |
| 29 | |
| 30 exc_type, exc_value, exc_tb = sys.exc_info() | |
| 31 | |
| 32 stack = [] | |
| 33 tb = exc_tb | |
| 34 while tb: | |
| 35 stack.append(tb) | |
| 36 tb = tb.tb_next | |
| 37 stack.reverse() | |
| 38 | |
| 39 hgframe = 'unknown' | |
| 40 hgline = 'unknown' | |
| 41 | |
| 42 # Find the first Mercurial frame in the stack. | |
| 43 for tb in stack: | |
| 44 mod = inspect.getmodule(tb) | |
| 45 if not mod.__name__.startswith(('hg', 'mercurial')): | |
| 46 continue | |
| 47 | |
| 48 frame = tb.tb_frame | |
| 49 | |
| 50 try: | |
| 51 with open(inspect.getsourcefile(tb), 'r') as fh: | |
| 52 hgline = fh.readlines()[frame.f_lineno - 1].strip() | |
| 53 except (IndexError, OSError): | |
| 54 pass | |
| 55 | |
| 56 hgframe = '%s:%d' % (frame.f_code.co_filename, frame.f_lineno) | |
| 57 break | |
| 58 | |
| 59 primary = traceback.extract_tb(exc_tb)[-1] | |
| 60 primaryframe = '%s:%d' % (primary.filename, primary.lineno) | |
| 61 | |
| 62 with open(dest, 'wb') as fh: | |
| 63 parts = [ | |
| 64 str(exc_value), | |
| 65 primaryframe, | |
| 66 hgframe, | |
| 67 hgline, | |
| 68 ] | |
| 69 fh.write(b'\0'.join(p.encode('utf-8', 'replace') for p in parts)) | |
| 70 | |
| 71 def extsetup(ui): | |
| 72 extensions.wrapfunction(dispatch, 'handlecommandexception', | |
| 73 handleexception) |