--- /dev/null
+#define _GNU_SOURCE
+#include <ccan/tap/tap.h>
+#include <stdarg.h>
+#include <setjmp.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include "utils.h"
+#include <ccan/opt/opt.c>
+#include <ccan/opt/usage.c>
+
+static char *my_cb(void *p)
+{
+ return NULL;
+}
+
+/* Test helpers. */
+int main(int argc, char *argv[])
+{
+ char *output;
+ plan_tests(18);
+ opt_register_table(subtables, NULL);
+ opt_register_noarg("--kkk", 'k', my_cb, NULL, "magic kkk option");
+ output = opt_usage("my name", "ExTrA Args");
+ diag("%s", output);
+ ok1(strstr(output, "Usage: my name"));
+ ok1(strstr(output, "--jjj/-j <arg>"));
+ ok1(strstr(output, "ExTrA Args"));
+ ok1(strstr(output, "-a "));
+ ok1(strstr(output, " Description of a\n"));
+ ok1(strstr(output, "-b <arg>"));
+ ok1(strstr(output, " Description of b\n"));
+ ok1(strstr(output, "--ddd "));
+ ok1(strstr(output, " Description of ddd\n"));
+ ok1(strstr(output, "--eee <arg> "));
+ ok1(strstr(output, " Description of eee\n"));
+ ok1(strstr(output, "long table options:\n"));
+ /* This table is hidden. */
+ ok1(!strstr(output, "--ggg/-g "));
+ ok1(!strstr(output, " Description of ggg\n"));
+ ok1(!strstr(output, "--hhh/-h <arg>"));
+ ok1(!strstr(output, " Description of hhh\n"));
+ ok1(strstr(output, "--kkk/-k"));
+ ok1(strstr(output, "magic kkk option"));
+ free(output);
+
+ return exit_status();
+}