+static void test_dns_name_to_wire_format_one(const char *what, const char *expect, size_t buffer_sz, int ret) {
+ uint8_t buffer[buffer_sz];
+ int r;
+
+ r = dns_name_to_wire_format(what, buffer, buffer_sz);
+ assert_se(r == ret);
+
+ if (r < 0)
+ return;
+
+ assert_se(!memcmp(buffer, expect, r));
+}
+
+static void test_dns_name_to_wire_format(void) {
+ const char out1[] = { 3, 'f', 'o', 'o', 0 };
+ const char out2[] = { 5, 'h', 'a', 'l', 'l', 'o', 3, 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
+ const char out3[] = { 4, ' ', 'f', 'o', 'o', 3, 'b', 'a', 'r', 0 };
+
+ test_dns_name_to_wire_format_one("", NULL, 0, -EINVAL);
+
+ test_dns_name_to_wire_format_one("foo", out1, sizeof(out1), sizeof(out1));
+ test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) + 1, sizeof(out1));
+ test_dns_name_to_wire_format_one("foo", out1, sizeof(out1) - 1, -ENOBUFS);
+
+ test_dns_name_to_wire_format_one("hallo.foo.bar", out2, sizeof(out2), sizeof(out2));
+ test_dns_name_to_wire_format_one("hallo.foo..bar", NULL, 32, -EINVAL);
+
+ test_dns_name_to_wire_format_one("\\032foo.bar", out3, sizeof(out3), sizeof(out3));
+}
+