upstream/mercurial-mirror Files · tests/test-symlink-placeholder.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

Matt Mackall - - Load All Authors

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        Matt Mackall
    
tests: replace exit 80 with #require

              r22046
            
      #require symlink

        Mads Kiilerich
    
tests: use 'hghave symlink' for tests using symlinks

              r15441
            
        Matt Mackall
    
windows: sanity-check symlink placeholders...

              r15348
            
      Create extension that can disable symlink support:

        $ cat > nolink.py <<EOF

        > from mercurial import extensions, util

        > def setflags(orig, f, l, x):

        >     pass

        > def checklink(orig, path):

        >     return False

        > def extsetup(ui):

        >     extensions.wrapfunction(util, 'setflags', setflags)

        >     extensions.wrapfunction(util, 'checklink', checklink)

        > EOF

        $ hg init unix-repo

        $ cd unix-repo

        $ echo foo > a

        $ ln -s a b

        $ hg ci -Am0

        adding a

        adding b

        $ cd ..

      Simulate a checkout shared on NFS/Samba:

        $ hg clone -q unix-repo shared

        $ cd shared

        $ rm b

        $ echo foo > b

        $ hg --config extensions.n=$TESTTMP/nolink.py status --debug

        ignoring suspect symlink placeholder "b"

      Make a clone using placeholders:

        $ hg --config extensions.n=$TESTTMP/nolink.py clone . ../win-repo

        updating to branch default

        2 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cd ../win-repo

        $ cat b

        a (no-eol)

        $ hg --config extensions.n=$TESTTMP/nolink.py st --debug

        Siddharth Agarwal
    
localrepo.status: ignore empty symlink placeholders...

              r19650
            
      Empty placeholder:

        $ rm b

        $ touch b

        $ hg --config extensions.n=$TESTTMP/nolink.py st --debug

        ignoring suspect symlink placeholder "b"

        Matt Mackall
    
windows: sanity-check symlink placeholders...

              r15348
            
      Write binary data to the placeholder:

        >>> open('b', 'w').write('this is a binary\0')

        $ hg --config extensions.n=$TESTTMP/nolink.py st --debug

        ignoring suspect symlink placeholder "b"

      Write a long string to the placeholder:

        >>> open('b', 'w').write('this' * 1000)

        $ hg --config extensions.n=$TESTTMP/nolink.py st --debug

        ignoring suspect symlink placeholder "b"

      Commit shouldn't succeed:

        $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1

        nothing changed

        [1]

      Write a valid string to the placeholder:

        >>> open('b', 'w').write('this')

        $ hg --config extensions.n=$TESTTMP/nolink.py st --debug

        M b

        $ hg --config extensions.n=$TESTTMP/nolink.py ci -m1

        $ hg manifest tip --verbose

        644   a

        644 @ b

        Mads Kiilerich
    
tests: add missing trailing 'cd ..'...

              r16913
            
        $ cd ..

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g o	Goto repository settings
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Matt Mackall tests: replace exit 80 with #require	r22046	#require symlink
Mads Kiilerich tests: use 'hghave symlink' for tests using symlinks	r15441
Matt Mackall windows: sanity-check symlink placeholders...	r15348	Create extension that can disable symlink support:

		$ cat > nolink.py <<EOF
		> from mercurial import extensions, util
		> def setflags(orig, f, l, x):
		> pass
		> def checklink(orig, path):
		> return False
		> def extsetup(ui):
		> extensions.wrapfunction(util, 'setflags', setflags)
		> extensions.wrapfunction(util, 'checklink', checklink)
		> EOF

		$ hg init unix-repo
		$ cd unix-repo
		$ echo foo > a
		$ ln -s a b
		$ hg ci -Am0
		adding a
		adding b
		$ cd ..

		Simulate a checkout shared on NFS/Samba:

		$ hg clone -q unix-repo shared
		$ cd shared
		$ rm b
		$ echo foo > b
		$ hg --config extensions.n=$TESTTMP/nolink.py status --debug
		ignoring suspect symlink placeholder "b"

		Make a clone using placeholders:

		$ hg --config extensions.n=$TESTTMP/nolink.py clone . ../win-repo
		updating to branch default
		2 files updated, 0 files merged, 0 files removed, 0 files unresolved
		$ cd ../win-repo
		$ cat b
		a (no-eol)
		$ hg --config extensions.n=$TESTTMP/nolink.py st --debug

Siddharth Agarwal localrepo.status: ignore empty symlink placeholders...	r19650	Empty placeholder:

		$ rm b
		$ touch b
		$ hg --config extensions.n=$TESTTMP/nolink.py st --debug
		ignoring suspect symlink placeholder "b"

Matt Mackall windows: sanity-check symlink placeholders...	r15348	Write binary data to the placeholder:

		>>> open('b', 'w').write('this is a binary\0')
		$ hg --config extensions.n=$TESTTMP/nolink.py st --debug
		ignoring suspect symlink placeholder "b"

		Write a long string to the placeholder:

		>>> open('b', 'w').write('this' * 1000)
		$ hg --config extensions.n=$TESTTMP/nolink.py st --debug
		ignoring suspect symlink placeholder "b"

		Commit shouldn't succeed:

		$ hg --config extensions.n=$TESTTMP/nolink.py ci -m1
		nothing changed
		[1]

		Write a valid string to the placeholder:

		>>> open('b', 'w').write('this')
		$ hg --config extensions.n=$TESTTMP/nolink.py st --debug
		M b
		$ hg --config extensions.n=$TESTTMP/nolink.py ci -m1
		$ hg manifest tip --verbose
		644 a
		644 @ b
Mads Kiilerich tests: add missing trailing 'cd ..'...	r16913
		$ cd ..