Understanding in client how validation works when we define any schema in producer

in existing example if we see producer-schema.js where we are setting JSON schema for the topic by producer
and let say I enabled enforceValidation from pulsar-admin to true
so now I am expecting if producer is trying to send message which dosent not follow the schema client should throw an error validation failed
for example if producer is trying to send message
producer.send({
data: Buffer.from(JSON.stringify({"a":"testXYZ","b":1})),
});

for topic schema validation is already enabled
with below command

bin/pulsar-admin namespaces set-schema-validation-enforce --enable tenant/namespace

as we can see a should be integer but I am passing string
so I am expecting that pulsar or client should throw validation error instead of sending this message successfully?
same case from consumer side too

从现有的 producer-schema.js 示例和 issue 中所示的 producer.send 调用开始。使用提供的 pulsar-admin 命令，在启用 enforceValidation 的情况下重现发送操作，然后检查相应的 consumer 端行为。当客户端行为得到确认，并且预期的验证结果已得到明确记录或作为 bug 跟踪时，即视为完成。