TEST(WRITES(pb_encode_tag_for_field(&s, &field), "\x51"));
field.type = PB_LTYPE_STRING;
TEST(WRITES(pb_encode_tag_for_field(&s, &field), "\x52"));
TEST(WRITES(pb_encode_tag_for_field(&s, &field), "\x51"));
field.type = PB_LTYPE_STRING;
TEST(WRITES(pb_encode_tag_for_field(&s, &field), "\x52"));