test-generated-code2.c: Add default value test

t/generated-code2/test-generated-code2.c

@@ -1721,6 +1721,33 @@ assert_optional_default_values_are_default (Foo__DefaultOptionalValues *mess)
   assert (memcmp (mess->v_bytes.data, "a \0 character", 13) == 0);
 }
 
+static void
+assert_unspecified_default_values_are_correct (Foo__TestMessOptional *mess)
+{
+  assert (!mess->has_test_int32);
+  assert (mess->test_int32 == 0);
+  assert (!mess->has_test_uint32);
+  assert (mess->test_uint32 == 0);
+  assert (!mess->has_test_int64);
+  assert (mess->test_int64 == 0);
+  assert (!mess->has_test_uint64);
+  assert (mess->test_uint64 == 0);
+  assert (!mess->has_test_float);
+  assert (mess->test_float == 0.0);
+  assert (!mess->has_test_double);
+  assert (mess->test_double == 0.0);
+  assert (mess->test_string == NULL);
+  assert (!mess->has_test_bytes);
+  assert (mess->test_bytes.len == 0);
+  assert (mess->test_bytes.data == NULL);
+  assert (!mess->has_test_boolean);
+  assert (!mess->test_boolean);
+  assert (!mess->has_test_enum_small);
+  assert (mess->test_enum_small == FOO__TEST_ENUM_SMALL__NEG_VALUE);
+  assert (!mess->has_test_enum);
+  assert (mess->test_enum == FOO__TEST_ENUM__VALUENEG123456);
+}
+
 static void
 test_optional_default_values (void)
 {
@@ -1733,6 +1760,9 @@ test_optional_default_values (void)
   free (data);
   assert_optional_default_values_are_default (mess2);
   foo__default_optional_values__free_unpacked (mess2, NULL);
+
+  Foo__TestMessOptional mess3 = FOO__TEST_MESS_OPTIONAL__INIT;
+  assert_unspecified_default_values_are_correct (&mess3);
 }
 
 static void