test-lib: allow negation of prerequisites

diff --git a/t/t6035-merge-dir-to-symlink.sh b/t/t6035-merge-dir-to-symlink.sh
index 92e02d5d77501b2a3ff52069931a534fc7bb24fd..2599ae50eb94051f66b4dc1de603aaf8cd1f79eb 100755 (executable)
--- a/t/t6035-merge-dir-to-symlink.sh
+++ b/t/t6035-merge-dir-to-symlink.sh
@@ -17,13 +17,21 @@ test_expect_success SYMLINKS 'create a commit where dir a/b changed to symlink'
        git commit -m "dir to symlink"
 '
 
-test_expect_success SYMLINKS 'keep a/b-2/c/d across checkout' '
+test_expect_success SYMLINKS 'checkout does not clobber untracked symlink' '
        git checkout HEAD^0 &&
        git reset --hard master &&
        git rm --cached a/b &&
        git commit -m "untracked symlink remains" &&
-        git checkout start^0 &&
-        test -f a/b-2/c/d
+       test_must_fail git checkout start^0
+'
+
+test_expect_success SYMLINKS 'a/b-2/c/d is kept when clobbering symlink b' '
+       git checkout HEAD^0 &&
+       git reset --hard master &&
+       git rm --cached a/b &&
+       git commit -m "untracked symlink remains" &&
+       git checkout -f start^0 &&
+       test -f a/b-2/c/d
 '
 
 test_expect_success SYMLINKS 'checkout should not have deleted a/b-2/c/d' '