tests/test-exchange-obsmarkers-case-A7.t
author Augie Fackler <augie@google.com>
Mon, 08 Jul 2019 13:12:20 -0400
branchstable
changeset 42562 97ada9b8d51b
parent 31912 7b829624319f
child 42893 34a46d48d24e
permissions -rw-r--r--
posix: always seek to EOF when opening a file in append mode Python 3 already does this, so skip it there. Consider the program: #include <stdio.h> int main() { FILE *f = fopen("narf", "w"); fprintf(f, "narf\n"); fclose(f); f = fopen("narf", "a"); printf("%ld\n", ftell(f)); fprintf(f, "troz\n"); printf("%ld\n", ftell(f)); return 0; } on macOS, FreeBSD, and Linux with glibc, this program prints 5 10 but on musl libc (Alpine Linux and probably others) this prints 0 10 By my reading of https://pubs.opengroup.org/onlinepubs/009695399/functions/fopen.html this is technically correct, specifically: > Opening a file with append mode (a as the first character in the > mode argument) shall cause all subsequent writes to the file to be > forced to the then current end-of-file, regardless of intervening > calls to fseek(). in other words, the file position doesn't really matter in append-mode files, and we can't depend on it being at all meaningful unless we perform a seek() before tell() after open(..., 'a'). Experimentally after a .write() we can do a .tell() and it'll always be reasonable, but I'm unclear from reading the specification if that's a smart thing to rely on. This matches what we do on Windows and what Python 3 does for free, so let's just be consistent. Thanks to Yuya for the idea.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Testing obsolescence markers push: Cases A.7
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Mercurial pushes obsolescences markers relevant to the "pushed-set", the set of
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all changesets that requested to be "in sync" after the push (even if they are
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already on both side).
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This test belongs to a series of tests checking such set is properly computed
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and applied. This does not tests "obsmarkers" discovery capabilities.
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Category A: simple cases
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TestCase 7: markers one non targeted common changeset
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A.7 non targeted common changeset
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=================================
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.. {{{
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..    ⇠◕ A
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..     |
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..      O
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.. }}}
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..
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.. Markers exist from:
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..
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..  * Chain from A
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..
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.. Command run:
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..
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..  * hg push -r O
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..
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.. Expected exchange:
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..
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..  * ø
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Setup
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-----
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  $ . $TESTDIR/testlib/exchange-obsmarker-util.sh
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Initial
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  $ setuprepos A.7
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  creating test repo for test case A.7
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  - pulldest
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  - main
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  - pushdest
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  cd into `main` and proceed with env setup
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  $ cd main
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  $ mkcommit A
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  $ hg push -q ../pushdest
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  $ hg push -q ../pulldest
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  $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(A)'`
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  $ hg log -G --hidden
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  @  f5bc6836db60 (draft): A
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  |
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  o  a9bdc8b26820 (public): O
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  $ inspect_obsmarkers
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  obsstore content
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  ================
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  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
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  $ cd ..
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  $ cd ..
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Actual Test
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-----------------------------------
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  $ dotest A.7 O
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  ## Running testcase A.7
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  # testing echange of "O" (a9bdc8b26820)
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  ## initial state
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  # obstore: main
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  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
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  # obstore: pushdest
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  # obstore: pulldest
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  ## pushing "O" from main to pushdest
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  pushing to pushdest
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  searching for changes
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  no changes found
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  ## post push state
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  # obstore: main
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  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
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  # obstore: pushdest
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  # obstore: pulldest
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  ## pulling "a9bdc8b26820" from main into pulldest
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  pulling from main
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  no changes found
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  ## post pull state
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  # obstore: main
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  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
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  # obstore: pushdest
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  # obstore: pulldest