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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> |
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date | Mon, 20 Nov 2017 23:02:32 -0800 |
parents | 1aee2ab0f902 |
children |
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Mercurial's internal web server, hgweb, can serve either a single repository, or a tree of repositories. In the second case, repository paths and global options can be defined using a dedicated configuration file common to :hg:`serve`, ``hgweb.wsgi``, ``hgweb.cgi`` and ``hgweb.fcgi``. This file uses the same syntax as other Mercurial configuration files but recognizes only the following sections: - web - paths - collections The ``web`` options are thoroughly described in :hg:`help config`. The ``paths`` section maps URL paths to paths of repositories in the filesystem. hgweb will not expose the filesystem directly - only Mercurial repositories can be published and only according to the configuration. The left hand side is the path in the URL. Note that hgweb reserves subpaths like ``rev`` or ``file``, try using different names for nested repositories to avoid confusing effects. The right hand side is the path in the filesystem. If the specified path ends with ``*`` or ``**`` the filesystem will be searched recursively for repositories below that point. With ``*`` it will not recurse into the repositories it finds (except for ``.hg/patches``). With ``**`` it will also search inside repository working directories and possibly find subrepositories. In this example:: [paths] /projects/a = /srv/tmprepos/a /projects/b = c:/repos/b / = /srv/repos/* /user/bob = /home/bob/repos/** - The first two entries make two repositories in different directories appear under the same directory in the web interface - The third entry will publish every Mercurial repository found in ``/srv/repos/``, for instance the repository ``/srv/repos/quux/`` will appear as ``http://server/quux/`` - The fourth entry will publish both ``http://server/user/bob/quux/`` and ``http://server/user/bob/quux/testsubrepo/`` The ``collections`` section is deprecated and has been superseded by ``paths``. URLs and Common Arguments ========================= URLs under each repository have the form ``/{command}[/{arguments}]`` where ``{command}`` represents the name of a command or handler and ``{arguments}`` represents any number of additional URL parameters to that command. The web server has a default style associated with it. Styles map to a collection of named templates. Each template is used to render a specific piece of data, such as a changeset or diff. The style for the current request can be overwritten two ways. First, if ``{command}`` contains a hyphen (``-``), the text before the hyphen defines the style. For example, ``/atom-log`` will render the ``log`` command handler with the ``atom`` style. The second way to set the style is with the ``style`` query string argument. For example, ``/log?style=atom``. The hyphenated URL parameter is preferred. Not all templates are available for all styles. Attempting to use a style that doesn't have all templates defined may result in an error rendering the page. Many commands take a ``{revision}`` URL parameter. This defines the changeset to operate on. This is commonly specified as the short, 12 digit hexadecimal abbreviation for the full 40 character unique revision identifier. However, any value described by :hg:`help revisions` typically works. Commands and URLs ================= The following web commands and their URLs are available: .. webcommandsmarker