git-branch-list: Make the branch list work in subdirectories

When the current directory was not the Git root, the command wouldn't
work. It expected to find the branch list database in the `.git`
directory in the current directory.

Make the program work even if the current directory is a subdirectory of
the Git repository.

1 files changed, 17 insertions, 0 deletions

diff --git a/t/105-list-works-in-subdirectory.t b/t/105-list-works-in-subdirectory.t
new file mode 100644
index 0000000..b236314
--- /dev/null
+++ b/t/105-list-works-in-subdirectory.t
@@ -0,0 +1,17 @@
+#!/usr/bin/env perl -w
+
+use strict;
+
+use Test::More;
+
+use Bin qw($BIN);
+
+mkdir 't-git-repo/subdirectory', 0755;
+
+chdir 't-git-repo/subdirectory' or die $!;
+
+my $branch_list = qx($BIN);
+is $branch_list, '', 'must find database file';
+
+
+done_testing;