tests: smbios: add test for legacy mode CLI options

Unfortunately having 2.0 machine type deprecated is not enough
to get rid of legacy SMBIOS handling since 'isapc' also uses
that and it's staying around.

Hence add test for CLI options handling to be sure that it
ain't broken during SMBIOS code refactoring.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Tested-by: Fiona Ebner <f.ebner@proxmox.com>
Message-Id: <20240314152302.2324164-4-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

tests/qtest/bios-tables-test.c

@@ -2106,6 +2106,21 @@ static void test_acpi_pc_smbios_blob(void)
     free_test_data(&data);
 }
 
+static void test_acpi_isapc_smbios_legacy(void)
+{
+    uint8_t req_type11[] = { 1, 11 };
+    test_data data = {
+        .machine = "isapc",
+        .variant = ".pc_smbios_legacy",
+        .required_struct_types = req_type11,
+        .required_struct_types_len = ARRAY_SIZE(req_type11),
+    };
+
+    test_smbios("-smbios file=tests/data/smbios/type11_blob.legacy "
+                "-smbios type=1,family=TEST", &data);
+    free_test_data(&data);
+}
+
 static void test_oem_fields(test_data *data)
 {
     int i;
@@ -2261,6 +2276,8 @@ int main(int argc, char *argv[])
                            test_acpi_pc_smbios_options);
             qtest_add_func("acpi/piix4/smbios-blob",
                            test_acpi_pc_smbios_blob);
+            qtest_add_func("acpi/piix4/smbios-legacy",
+                           test_acpi_isapc_smbios_legacy);
         }
         if (qtest_has_machine(MACHINE_Q35)) {
             qtest_add_func("acpi/q35", test_acpi_q35_tcg);