[PATCH v5 1/5] t0060: Add test for manipulating symlinks via absolute paths

When symlinks in the working tree are manipulated using the absolute
path, git dereferences them, and tries to manipulate the link target
instead.

This is a regression introduced by 18e051a:
  setup: translate symlinks in filename when using absolute paths
(which did not take symlinks in the work tree into consideration).

Add a known-breakage tests using the prefix_path function, which
currently uses real_path, causing the dereference.

Signed-off-by: Martin Erik Werner <redacted>
---
 t/t0060-path-utils.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index 07c10c8..0bba988 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh

@@ -190,6 +190,11 @@ test_expect_success SYMLINKS 'real path works on symlinks' '
 	test "$sym" = "$(test-path-utils real_path "$dir2/syml")"
 '
 
+test_expect_failure SYMLINKS 'prefix_path works with absolute paths to work tree symlinks' '
+	ln -s target symlink &&
+	test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = "symlink"
+'
+
 relative_path /foo/a/b/c/	/foo/a/b/	c/
 relative_path /foo/a/b/c/	/foo/a/b	c/
 relative_path /foo/a//b//c/	///foo/a/b//	c/		POSIX

-- 
1.8.5.2