ccan: add test for line-wrapping usage message.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/ccan/opt/test/run-usage.c b/ccan/opt/test/run-usage.c
index 7d94ced219b59868883801cb26bd7f362019e4f7..c647537058860e03e1cbf42ec6ff9f545b2d762b 100644 (file)
--- a/ccan/opt/test/run-usage.c
+++ b/ccan/opt/test/run-usage.c
@@ -30,7 +30,7 @@ int main(int argc, char *argv[])
        char *longname = strdup("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
        char *shortname = strdup("shortname");
 
-       plan_tests(48);
+       plan_tests(50);
        opt_register_table(subtables, NULL);
        opt_register_noarg("--kkk|-k", my_cb, NULL, "magic kkk option");
        opt_register_noarg("-?", opt_usage_and_exit, "<MyArgs>...",
@@ -108,6 +108,17 @@ int main(int argc, char *argv[])
        ok1(strstr(output, "AAAAll"));
        free(output);
 
+       reset_options();
+       /* Valgrind nails this to 100 anyway :( */
+       setenv("COLUMNS", "100", 1);
+       opt_register_noarg("--long", my_cb, NULL, "Extremely long option which requires more than one line for its full description to be shown in the usage message.");
+       output = opt_usage("longarg", NULL);
+       diag("%s", output);
+       ok1(strstr(output, "Usage: longarg \n"));
+       ok1(strstr(output, "\n--long  Extremely long option which requires more than one line for its full description to be shown\n"
+                  "        in the usage message.\n"));
+       free(output);
+
        free(shortname);
        free(longname);
        return exit_status();