[6.0] fa84da36f vnum: Add test coverage for 32bit unsigned limits

[Dridi Boukelmoune]

commit fa84da36f535f9a1d7c9a8328e8482ce0725da94
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Thu Apr 4 19:15:34 2024 +0200

    vnum: Add test coverage for 32bit unsigned limits

diff --git a/lib/libvarnish/vnum.c b/lib/libvarnish/vnum.c
index 59e804ec8..47effe4cc 100644
--- a/lib/libvarnish/vnum.c
+++ b/lib/libvarnish/vnum.c
@@ -238,7 +238,7 @@ static struct test_case {
 	uintmax_t rel;
 	uintmax_t val;
 	const char *err;
-} test_cases[] = {
+} test_vnum_2bytes[] = {
 	{ "1",			(uintmax_t)0,	(uintmax_t)1 },
 	{ "1B",			(uintmax_t)0,	(uintmax_t)1<<0 },
 	{ "1 B",		(uintmax_t)0,	(uintmax_t)1<<0 },
@@ -278,6 +278,10 @@ static struct test_case {
 	{ "2%",			(uintmax_t)1024,	(uintmax_t)20 },
 	{ "3%",			(uintmax_t)1024,	(uintmax_t)31 },
 
+	/* 32bit limits */
+	{ "4294967295b",	(uintmax_t)0,	(uintmax_t)4294967295ULL},
+	{ "4294967294b",	(uintmax_t)0,	(uintmax_t)4294967294ULL},
+
 	/* Check the error checks */
 	{ "",			0,	0,	err_miss_num },
 	{ "m",			0,	0,	err_invalid_num },
@@ -347,7 +351,7 @@ main(int argc, char *argv[])
 		}
 	}
 
-	for (tc = test_cases; tc->str; ++tc) {
+	for (tc = test_vnum_2bytes; tc->str; ++tc) {
 		e = VNUM_2bytes(tc->str, &val, tc->rel);
 		if (e != NULL)
 			val = 0;