test-lib: allow negation of prerequisites

diff --git a/t/t2000-checkout-cache-clash.sh b/t/t2000-checkout-cache-clash.sh
index f7e1a735ec8699616280a086f59dc50c078bfaa7..de3edb5d571ea83263f5133e751704ab0ba580c8 100755 (executable)
--- a/t/t2000-checkout-cache-clash.sh
+++ b/t/t2000-checkout-cache-clash.sh
@@ -48,4 +48,13 @@ test_expect_success \
     'git checkout-index conflicting paths.' \
     'test -f path0 && test -d path1 && test -f path1/file1'
 
+test_expect_success SYMLINKS 'checkout-index -f twice with --prefix' '
+       mkdir -p tar/get &&
+       ln -s tar/get there &&
+       echo first &&
+       git checkout-index -a -f --prefix=there/ &&
+       echo second &&
+       git checkout-index -a -f --prefix=there/
+'
+
 test_done