1 files changed, 26 insertions, 0 deletions
diff --git a/t/helper/test-match-trees.c b/t/helper/test-match-trees.c
new file mode 100644
index 0000000..4dad709
--- /dev/null
+++ b/t/helper/test-match-trees.c
@@ -0,0 +1,26 @@
+#include "cache.h"
+#include "tree.h"
+
+int main(int ac, char **av)
+{
+	unsigned char hash1[20], hash2[20], shifted[20];
+	struct tree *one, *two;
+
+	setup_git_directory();
+
+	if (get_sha1(av[1], hash1))
+		die("cannot parse %s as an object name", av[1]);
+	if (get_sha1(av[2], hash2))
+		die("cannot parse %s as an object name", av[2]);
+	one = parse_tree_indirect(hash1);
+	if (!one)
+		die("not a tree-ish %s", av[1]);
+	two = parse_tree_indirect(hash2);
+	if (!two)
+		die("not a tree-ish %s", av[2]);
+
+	shift_tree(one->object.oid.hash, two->object.oid.hash, shifted, -1);
+	printf("shifted: %s\n", sha1_to_hex(shifted));
+
+	exit(0);
+}