test: TestCreateAzureBucketManagedIdentityCredentialCalled is doing real IO

[ferhatelmas]

Apache Iceberg version

None

Please describe the bug 🐞

and doing a retry loop inside azure sdk (~100s). An example run.

It's an integration test disguised as unit. It should instead inject credentials factory or HTTP transport. At worst, a shorter context deadline.

cc @alessandro-nori

[Revanth14]

I can take this. The real I/O is triggered by bucket.List, which causes Azure managed-identity discovery and SDK retries.

I will updatecreateAzureBucket to allow credential-factory injection in tests. The managed-identity test will use a fake azcore.TokenCredential and verify that the correct credential factory is selected without making an Azure request.

I’ll also update the adjacent default-credential test, which currently has the same real-I/O pattern.

If no one is working on this, I can open a PR shortly. @ferhatelmas

[ferhatelmas]

I agree, default case has the same problem. Approach sounds good to me, go ahead from my side.