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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

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test-rename-merge1.t
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/ tests / test-rename-merge1.t
$ hg init
$ echo "[merge]" >> .hg/hgrc
$ echo "followcopies = 1" >> .hg/hgrc
$ echo foo > a
$ echo foo > a2
$ hg add a a2
$ hg ci -m "start"
$ hg mv a b
$ hg mv a2 b2
$ hg ci -m "rename"
$ hg co 0
2 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo blahblah > a
$ echo blahblah > a2
$ hg mv a2 c2
$ hg ci -m "modify"
created new head
$ hg merge -y --debug
searching for copies back to rev 1
unmatched files in local:
c2
unmatched files in other:
b
b2
all copies found (* = to merge, ! = divergent, % = renamed and deleted):
src: 'a' -> dst: 'b' *
src: 'a2' -> dst: 'b2' !
src: 'a2' -> dst: 'c2' !
checking for directory renames
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: af1939970a1c, local: 044f8520aeeb+, remote: 85c198ef2f6c
note: possible conflict - a2 was renamed multiple times to:
c2
b2
preserving a for resolve of b
removing a
b2: remote created -> g
getting b2
b: remote moved from a -> m (premerge)
picked tool ':merge' for b (binary False symlink False changedelete False)
merging a and b to b
my b@044f8520aeeb+ other b@85c198ef2f6c ancestor a@af1939970a1c
premerge successful
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg status -AC
M b
a
M b2
R a
C c2
$ cat b
blahblah
$ hg ci -m "merge"
$ hg debugindex b
rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 67 ..... 1 57eacc201a7f 000000000000 000000000000 (re)
1 67 72 ..... 3 4727ba907962 000000000000 57eacc201a7f (re)
$ hg debugrename b
b renamed from a:dd03b83622e78778b403775d0d074b9ac7387a66
This used to trigger a "divergent renames" warning, despite no renames
$ hg cp b b3
$ hg cp b b4
$ hg ci -A -m 'copy b twice'
$ hg up eb92d88a9712
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg up
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg rm b3 b4
$ hg ci -m 'clean up a bit of our mess'
We'd rather not warn on divergent renames done in the same changeset (issue2113)
$ hg cp b b3
$ hg mv b b4
$ hg ci -A -m 'divergent renames in same changeset'
$ hg up c761c6948de0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg up
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
Check for issue2642
$ hg init t
$ cd t
$ echo c0 > f1
$ hg ci -Aqm0
$ hg up null -q
$ echo c1 > f1 # backport
$ hg ci -Aqm1
$ hg mv f1 f2
$ hg ci -qm2
$ hg up 0 -q
$ hg merge 1 -q --tool internal:local
$ hg ci -qm3
$ hg merge 2
merging f1 and f2 to f2
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f2
c0
$ cd ..
Check for issue2089
$ hg init repo2089
$ cd repo2089
$ echo c0 > f1
$ hg ci -Aqm0
$ hg up null -q
$ echo c1 > f1
$ hg ci -Aqm1
$ hg up 0 -q
$ hg merge 1 -q --tool internal:local
$ echo c2 > f1
$ hg ci -qm2
$ hg up 1 -q
$ hg mv f1 f2
$ hg ci -Aqm3
$ hg up 2 -q
$ hg merge 3
merging f1 and f2 to f2
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f2
c2
$ cd ..
Check for issue3074
$ hg init repo3074
$ cd repo3074
$ echo foo > file
$ hg add file
$ hg commit -m "added file"
$ hg mv file newfile
$ hg commit -m "renamed file"
$ hg update 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg rm file
$ hg commit -m "deleted file"
created new head
$ hg merge --debug
searching for copies back to rev 1
unmatched files in other:
newfile
all copies found (* = to merge, ! = divergent, % = renamed and deleted):
src: 'file' -> dst: 'newfile' %
checking for directory renames
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: 19d7f95df299, local: 0084274f6b67+, remote: 5d32493049f0
note: possible conflict - file was deleted and renamed to:
newfile
newfile: remote created -> g
getting newfile
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg status
M newfile
$ cd ..