1 files changed, 35 insertions, 0 deletions
diff --git a/t/helper/test-sha1-array.c b/t/helper/test-sha1-array.c
new file mode 100644
index 0000000000..f7a53c4ad6
--- /dev/null
+++ b/t/helper/test-sha1-array.c
@@ -0,0 +1,35 @@
+#include "cache.h"
+#include "sha1-array.h"
+
+static int print_sha1(const unsigned char sha1[20], void *data)
+{
+	puts(sha1_to_hex(sha1));
+	return 0;
+}
+
+int cmd_main(int argc, const char **argv)
+{
+	struct sha1_array array = SHA1_ARRAY_INIT;
+	struct strbuf line = STRBUF_INIT;
+
+	while (strbuf_getline(&line, stdin) != EOF) {
+		const char *arg;
+		unsigned char sha1[20];
+
+		if (skip_prefix(line.buf, "append ", &arg)) {
+			if (get_sha1_hex(arg, sha1))
+				die("not a hexadecimal SHA1: %s", arg);
+			sha1_array_append(&array, sha1);
+		} else if (skip_prefix(line.buf, "lookup ", &arg)) {
+			if (get_sha1_hex(arg, sha1))
+				die("not a hexadecimal SHA1: %s", arg);
+			printf("%d\n", sha1_array_lookup(&array, sha1));
+		} else if (!strcmp(line.buf, "clear"))
+			sha1_array_clear(&array);
+		else if (!strcmp(line.buf, "for_each_unique"))
+			sha1_array_for_each_unique(&array, print_sha1, NULL);
+		else
+			die("unknown command: %s", line.buf);
+	}
+	return 0;
+}