[Bug] TopicName does not throw IllegalArgumentException if localName is whitespace only

[pdolif]

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• I searched in the issues and found nothing similar.

Read release policy

• I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker.

Version

Pulsar master

Minimal reproduce step

Call TopicName.get(" ").

What did you expect to see?

This is a test for the behavior I would expect:

try {
    TopicName.get(" ");
    fail("Should have raised exception");
} catch (IllegalArgumentException e) {
    // Ok
}

When creating a consumer with the topic name only being a whitespace we get:

java.lang.IllegalArgumentException: topicNames cannot have blank topic

That's why I expect TopicName.get(" ") to throw an exception too.

What did you see instead?

No exception is thrown.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!