test(spring-boot): Move the Boot 4 OTLP sample's tests into the module

Adds an integrationTestOtlp suite to sentry-spring-boot-4: the servlet
app with the OpenTelemetry Spring Boot starter, set up by
sentry-opentelemetry-otlp-spring, and OpenTelemetryOtlpEventProcessor.
It ports the sample's tests, which were the servlet suite's without
OkHttp, and keeps the log and metric attribute checks the sample had
dropped.

The sample's transactions came from Sentry's own tracing, which CI
enabled with SENTRY_TRACES_SAMPLE_RATE, so the suite sets the sample
rate the same way. A new test checks what OTLP mode is for: an error in
a request carries the request's OpenTelemetry trace. Events point at
that trace rather than at Sentry's transaction, so the GraphQL errors
are checked next to their transactions instead of by trace ID, as the
sample did.

The sample has no system tests left, so it comes off the system-test
runner. It was the backend workflow's last sample, so the workflow goes
too. The Spring Boot 4 matrix runs the new suite.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: runningcode

.github/workflows/spring-boot-4-matrix.yml

@@ -66,7 +66,8 @@ jobs:
             :sentry-spring-boot-4:integrationTestOtelNoAgent \
             :sentry-spring-boot-4:integrationTestLog4j2 \
             :sentry-spring-boot-4:integrationTestOtelAgent \
-            :sentry-spring-boot-4:integrationTestOtelAgentWithoutAutoInit
+            :sentry-spring-boot-4:integrationTestOtelAgentWithoutAutoInit \
+            :sentry-spring-boot-4:integrationTestOtlp
 
       - name: Upload test results
         if: always()

.github/workflows/system-tests-backend.yml

@@ -6,7 +6,6 @@ plugins {
   alias(libs.plugins.spring.dependency.management)
   alias(libs.plugins.kotlin.jvm)
   alias(libs.plugins.kotlin.spring)
-  id("io.sentry.systemtest")
 }
 
 group = "io.sentry.sample.spring-boot-4-otlp"
@@ -54,37 +53,6 @@ dependencies {
   // database query tracing
   implementation(projects.sentryJdbc)
   runtimeOnly(libs.hsqldb)
-
-  testImplementation(kotlin(Config.kotlinStdLib))
-  testImplementation(projects.sentry)
-  testImplementation(projects.sentrySystemTestSupport)
-  testImplementation(libs.apollo3.kotlin)
-  testImplementation(libs.kotlin.test.junit)
-  testImplementation(libs.slf4j2.api)
-  testImplementation(libs.springboot4.starter.test) {
-    exclude(group = "org.junit.vintage", module = "junit-vintage-engine")
-  }
-  testImplementation("ch.qos.logback:logback-classic:1.5.16")
-  testImplementation("ch.qos.logback:logback-core:1.5.16")
 }
 
 dependencyManagement { imports { mavenBom(libs.otel.instrumentation.bom.get().toString()) } }
-
-tasks.register<Test>("systemTest").configure {
-  group = "verification"
-  description = "Runs the System tests"
-
-  val test = project.extensions.getByType<SourceSetContainer>()["test"]
-  testClassesDirs = test.output.classesDirs
-  classpath = test.runtimeClasspath
-
-  maxParallelForks = 1
-
-  filter { includeTestsMatching("io.sentry.systemtest*") }
-}
-
-tasks.named("test").configure {
-  require(this is Test)
-
-  filter { excludeTestsMatching("io.sentry.systemtest.*") }
-}