test(spring-boot-jakarta): [Queue Instrumentation 22] Cover spring-kafka class-absence gate

[adinauer]

PR Stack (Queue Instrumentation)

• feat(core): [Queue Instrumentation 1] Add enableQueueTracing option and messaging span data conventions #5250
• feat(samples): [Queue Instrumentation 2] Add Kafka to Spring Boot 3 sample app #5253
• feat(spring-jakarta): [Queue Instrumentation 3] Add Kafka producer instrumentation #5254
• feat(spring-jakarta): [Queue Instrumentation 4] Add Kafka consumer instrumentation #5255
• feat(spring-boot-jakarta): [Queue Instrumentation 5] Add Kafka queue auto-configuration #5259
• test(samples): [Queue Instrumentation 6] Add Kafka queue system tests #5260
• feat(samples): [Queue Instrumentation 7] Add Kafka to Spring Boot 3 OTel sample apps #5265
• fix(spring-boot-jakarta): [Queue Instrumentation 8] Disable Sentry Kafka spans when OTel is active #5274
• fix(spring-jakarta): [Queue Instrumentation 9] Clean up stale ThreadLocal context in Kafka consumer interceptor #5279
• fix(spring-jakarta): [Queue Instrumentation 10] Fork root scopes and skip when OTel is active in Kafka consumer #5280
• fix(spring-jakarta): [Queue Instrumentation 11] Guard entire span lifecycle in Kafka producer interceptor #5281
• fix(spring-jakarta): [Queue Instrumentation 12] Add Kafka retry count attribute #5282
• fix(spring-jakarta): [Queue Instrumentation 13] Align enqueue time with Python #5283
• ref(kafka): [Queue Instrumentation 14] Extract sentry-kafka module #5288
• feat(samples): [Queue Instrumentation 15] Add opt-in Kafka console e2e coverage #5289
• fix(test): [Queue Instrumentation 16] Enable Kafka profile in system runner #5291
• feat(kafka): [Queue Instrumentation 17] Add manual consumer tracing helper #5312
• ref(samples): [Queue Instrumentation 18] Move Kafka sources into queues.kafka package #5313
• ref(samples): [Queue Instrumentation 19] Drop Kafka auto-config exclude from Spring Boot samples #5314
• ref(kafka): [Queue Instrumentation 20] Log Kafka instrumentation failures #5315
• fix(kafka): [Queue Instrumentation 21] Preserve third-party baggage on Kafka producer records #5316
• test(spring-boot-jakarta): [Queue Instrumentation 22] Cover spring-kafka class-absence gate #5318

---

📜 Description

SentryKafkaQueueConfiguration in SentryAutoConfiguration is gated on two classes being present on the classpath:

@ConditionalOnClass(name = {
  "org.springframework.kafka.core.KafkaTemplate",
  "io.sentry.kafka.SentryKafkaProducerInterceptor"
})

Only the SentryKafkaProducerInterceptor-missing half of that gate had test coverage. This PR adds a FilteredClassLoader(KafkaTemplate::class.java) test that asserts neither SentryKafkaProducerBeanPostProcessor nor SentryKafkaConsumerBeanPostProcessor is registered when spring-kafka is missing, even with sentry.enable-queue-tracing=true.

💡 Motivation and Context

Round out the class-absence gate coverage in SentryKafkaAutoConfigurationTest so the autoconfig contract for spring-kafka being absent is explicitly pinned by a test.

💚 How did you test it?

• ./gradlew :sentry-spring-boot-jakarta:test --tests='io.sentry.spring.boot.jakarta.SentryKafkaAutoConfigurationTest' — 6/6 pass (incl. new does not register Kafka BPPs when spring-kafka is not present).
• ./gradlew spotlessApply apiDump — clean.

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

None.

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

#skip-changelog

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.37.1 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	332.53 ms	401.24 ms	68.71 ms
Size	0 B	0 B	0 B