upstream/mercurial-mirror Files · tests/test-custom-filters.t

run-tests: mechanism to report exceptions during test execution...

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

Pierre-Yves David - - Load All Authors

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        $ hg init

        $ cat > .hg/hgrc <<EOF

        > [extensions]

        > prefixfilter = prefix.py

        > [encode]

        > *.txt = stripprefix: Copyright 2046, The Masters

        > [decode]

        > *.txt = insertprefix: Copyright 2046, The Masters

        > EOF

        $ cat > prefix.py <<EOF

        > from mercurial import error

        > def stripprefix(s, cmd, filename, **kwargs):

        >     header = '%s\n' % cmd

        >     if s[:len(header)] != header:

        >         raise error.Abort('missing header "%s" in %s' % (cmd, filename))

        >     return s[len(header):]

        > def insertprefix(s, cmd):

        >     return '%s\n%s' % (cmd, s)

        > def reposetup(ui, repo):

        >     repo.adddatafilter('stripprefix:', stripprefix)

        >     repo.adddatafilter('insertprefix:', insertprefix)

        > EOF

        $ cat > .hgignore <<EOF

        > .hgignore

        > prefix.py

        > prefix.pyc

        > EOF

        $ cat > stuff.txt <<EOF

        > Copyright 2046, The Masters

        > Some stuff to ponder very carefully.

        > EOF

        $ hg add stuff.txt

        $ hg ci -m stuff

      Repository data:

        $ hg cat stuff.txt

        Some stuff to ponder very carefully.

      Fresh checkout:

        $ rm stuff.txt

        $ hg up -C

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cat stuff.txt

        Copyright 2046, The Masters

        Some stuff to ponder very carefully.

        $ echo "Very very carefully." >> stuff.txt

        $ hg stat

        M stuff.txt

        $ echo "Unauthorized material subject to destruction." > morestuff.txt

      Problem encoding:

        $ hg add morestuff.txt

        $ hg ci -m morestuff

        abort: missing header "Copyright 2046, The Masters" in morestuff.txt

        [255]

        $ hg stat

        M stuff.txt

        A morestuff.txt

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				$ hg init

				$ cat > .hg/hgrc <<EOF
				> [extensions]
				> prefixfilter = prefix.py
				> [encode]
				> *.txt = stripprefix: Copyright 2046, The Masters
				> [decode]
				> *.txt = insertprefix: Copyright 2046, The Masters
				> EOF

				$ cat > prefix.py <<EOF
				> from mercurial import error
				> def stripprefix(s, cmd, filename, **kwargs):
				> header = '%s\n' % cmd
				> if s[:len(header)] != header:
				> raise error.Abort('missing header "%s" in %s' % (cmd, filename))
				> return s[len(header):]
				> def insertprefix(s, cmd):
				> return '%s\n%s' % (cmd, s)
				> def reposetup(ui, repo):
				> repo.adddatafilter('stripprefix:', stripprefix)
				> repo.adddatafilter('insertprefix:', insertprefix)
				> EOF

				$ cat > .hgignore <<EOF
				> .hgignore
				> prefix.py
				> prefix.pyc
				> EOF

				$ cat > stuff.txt <<EOF
				> Copyright 2046, The Masters
				> Some stuff to ponder very carefully.
				> EOF
				$ hg add stuff.txt
				$ hg ci -m stuff

				Repository data:

				$ hg cat stuff.txt
				Some stuff to ponder very carefully.

				Fresh checkout:

				$ rm stuff.txt
				$ hg up -C
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ cat stuff.txt
				Copyright 2046, The Masters
				Some stuff to ponder very carefully.
				$ echo "Very very carefully." >> stuff.txt
				$ hg stat
				M stuff.txt

				$ echo "Unauthorized material subject to destruction." > morestuff.txt

				Problem encoding:

				$ hg add morestuff.txt
				$ hg ci -m morestuff
				abort: missing header "Copyright 2046, The Masters" in morestuff.txt
				[255]
				$ hg stat
				M stuff.txt
				A morestuff.txt