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t/test-lib: add an SHA1 prerequisite

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There are some basic tests in our codebase that test that we get fixed
SHA-1 values.  These are valuable because they make sure that our SHA-1
implementation is free of bugs, but obviously these tests will fail with
a different hash.

There are also tests which intentionally produce objects that have
collisions when truncated to a certain length to test our handling of
these cases.  These tests, too, will fail with a different hash.

Add an SHA1 prerequisite to annotate both of these types of tests and
disable them when we're using a different hash.  In the future, we will
create versions of these tests which handle both SHA-1 and NewHash.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2018-05-13 02:24:11 +00:00 committed by Junio C Hamano
parent ccdcbd54c4
commit d16ab63429
1 changed files with 7 additions and 0 deletions
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7
t/test-lib.sh
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@ -1212,3 +1212,10 @@ test_lazy_prereq TIME_T_IS_64BIT 'test-tool date time_t-is64bit'
test_lazy_prereq CURL '
curl --version
'
# SHA1 is a test if the hash algorithm in use is SHA-1. This is both for tests
# which will not work with other hash algorithms and tests that work but don't
# test anything meaningful (e.g. special values which cause short collisions).
test_lazy_prereq SHA1 '
test $(git hash-object /dev/null) = e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
'