t4208: abstract away SHA-1-specific constants

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 7740d511d289f44bb1313308fe49d5894f64b3c2..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:
 #
@@ -963,10 +965,10 @@ test -d "$GIT_BUILD_DIR"/templates/blt || {
        error "You haven't built things yet, have you?"
 }
 
-if ! test -x "$GIT_BUILD_DIR"/t/helper/test-chmtime
+if ! test -x "$GIT_BUILD_DIR"/t/helper/test-tool
 then
-       echo >&2 'You need to build test-chmtime:'
-       echo >&2 'Run "make t/helper/test-chmtime" in the source (toplevel) directory'
+       echo >&2 'You need to build test-tool:'
+       echo >&2 'Run "make t/helper/test-tool" in the source (toplevel) directory'
        exit 1
 fi
 
@@ -1206,5 +1208,16 @@ test_lazy_prereq LONG_IS_64BIT '
        test 8 -le "$(build_option sizeof-long)"
 '
 
-test_lazy_prereq TIME_IS_64BIT 'test-date is64bit'
-test_lazy_prereq TIME_T_IS_64BIT 'test-date time_t-is64bit'
+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
+'