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t1600: fix racy index.skipHash test 

The test 1600.6 can fail under --stress due to mtime collisions. Most of
the tests include a removal of the index file to guarantee that the
index is updated. However, the submodule test addded in ee1f0c242e
(read-cache: add index.skipHash config option, 2023-01-06) did not
include this removal. Thus, on rare occasions, the test can fail because
the index still has a non-null trailing hash, as detected by the helper
added in da9acde14e (test-lib-functions: add helper for trailing hash,
2023-01-06).

By removing the submodule's index before the 'git -C sub add a' command,
we guarantee that the index is rewritten with the new index.skipHash
config option.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2023-01-17 09:49:27 -05:00 committed by Junio C Hamano
parent 17194b195d
commit 42ea7a4150
1 changed files with 1 additions and 0 deletions
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t/t1600-index.sh
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@ -88,6 +88,7 @@ test_expect_success 'index.skipHash config option' '
git -c protocol.file.allow=always submodule add ./ sub &&
git config index.skipHash false &&
git -C sub config index.skipHash true &&
rm -f .git/modules/sub/index &&
>sub/file &&
git -C sub add a &&
test_trailing_hash .git/modules/sub/index >hash &&