t4208: abstract away SHA-1-specific constants

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 483c8d6d7cd9734c04552043b5ff0cb7d1b0af3a..fed21c3dfc44a00977a9d673ea7cb07415da76ce 100644 (file)
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -184,6 +184,8 @@ _x40="$_x35$_x05"
 # Zero SHA-1
 _z40=0000000000000000000000000000000000000000
 
+OID_REGEX="$_x40"
+ZERO_OID=$_z40
 EMPTY_TREE=4b825dc642cb6eb9a060e54bf8d69288fbee4904
 EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
 
@@ -195,7 +197,7 @@ LF='
 # when case-folding filenames
 u200c=$(printf '\342\200\214')
 
-export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB
+export _x05 _x35 _x40 _z40 LF u200c EMPTY_TREE EMPTY_BLOB ZERO_OID OID_REGEX
 
 # Each test should start with something like this, after copyright notices:
 #
@@ -1208,3 +1210,14 @@ test_lazy_prereq LONG_IS_64BIT '
 
 test_lazy_prereq TIME_IS_64BIT 'test-tool date is64bit'
 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
+'