The current behaviour of prefix_path is to return an empty string if
prefixing and absolute path that only contains exactly the work tree.
This behaviour is a potential regression point.

Signed-off-by: Martin Erik Werner <martinerikwer...@gmail.com>
---
 t/t0060-path-utils.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index 0bba988..b8e92e1 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh
@@ -195,6 +195,12 @@ test_expect_failure SYMLINKS 'prefix_path works with 
absolute paths to work tree
        test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = 
"symlink"
 '
 
+test_expect_success 'prefix_path works with only absolute path to work tree' '
+       echo "" >expected &&
+       test-path-utils prefix_path prefix "$(pwd)" >actual &&
+       test_cmp expected actual
+'
+
 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

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