git-bisect.sh: don't accidentally override existing branch "bisect"

diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
index a90824ba8ab0e6df5c4afad528e30d118e23455c..78cd41245b301e731dc0fdd0066b3d3bac4f5405 100755 (executable)
--- a/t/t1400-update-ref.sh
+++ b/t/t1400-update-ref.sh
@@ -7,12 +7,19 @@ test_description='Test git update-ref and basic ref logging'
 . ./test-lib.sh
 
 Z=0000000000000000000000000000000000000000
-A=1111111111111111111111111111111111111111
-B=2222222222222222222222222222222222222222
-C=3333333333333333333333333333333333333333
-D=4444444444444444444444444444444444444444
-E=5555555555555555555555555555555555555555
-F=6666666666666666666666666666666666666666
+
+test_expect_success setup '
+
+       for name in A B C D E F
+       do
+               test_tick &&
+               T=$(git write-tree) &&
+               sha1=$(echo $name | git commit-tree $T) &&
+               eval $name=$sha1
+       done
+
+'
+
 m=refs/heads/master
 n_dir=refs/heads/gu
 n=$n_dir/fixes
@@ -44,23 +51,23 @@ test_expect_success \
         test $B"' = $(cat .git/'"$m"')'
 rm -f .git/$m
 
-test_expect_failure \
-       '(not) create HEAD with old sha1' \
-       "git update-ref HEAD $A $B"
-test_expect_failure \
-       "(not) prior created .git/$m" \
-       "test -f .git/$m"
+test_expect_success '(not) create HEAD with old sha1' "
+       ! git update-ref HEAD $A $B
+"
+test_expect_success "(not) prior created .git/$m" "
+       ! test -f .git/$m
+"
 rm -f .git/$m
 
 test_expect_success \
        "create HEAD" \
        "git update-ref HEAD $A"
-test_expect_failure \
-       '(not) change HEAD with wrong SHA1' \
-       "git update-ref HEAD $B $Z"
-test_expect_failure \
-       "(not) changed .git/$m" \
-       "test $B"' = $(cat .git/'"$m"')'
+test_expect_success '(not) change HEAD with wrong SHA1' "
+       ! git update-ref HEAD $B $Z
+"
+test_expect_success "(not) changed .git/$m" "
+       ! test $B"' = $(cat .git/'"$m"')
+'
 rm -f .git/$m
 
 : a repository with working tree always has reflog these days...