add kafka test container

README.md

@@ -2,6 +2,12 @@
 
 In the forge of software development, where annotations ignite, A crucible of testing, common classes to excite. Each annotation examined, with attention to detail and might, Their effects on code behavior, tested through day and night. From mockk objects to test doubles, a toolkit to refine, Developers and testers, their skills to redefine. The Annotation Validator, a sentinel of code integrity true, A library of verification, where testing wisdom shines anew.
 
+## Kafka Test Container
+
+`@KafkaTestContainer` Annotation for integration tests.
+
+Initialize Kafka test container using test container default properties
+
 ## Postgres Test Container
 
 `@PostgresTestContainer` Annotation for integration tests.

build.gradle.kts

@@ -12,6 +12,7 @@ dependencies {
     implementation(hlaeja.springboot.starter.r2dbc)
     implementation(hlaeja.springboot.starter.test)
     implementation(hlaeja.testcontainers.junit)
+    implementation(hlaeja.testcontainers.kafka)
     implementation(hlaeja.testcontainers.postgresql)
 
     testRuntimeOnly(hlaeja.junit.platform.launcher)

gradle.properties

@@ -1,3 +1,3 @@
 kotlin.code.style=official
 version=0.4.0-SNAPSHOT
-catalog=0.11.0
+catalog=0.12.0-SNAPSHOT

src/main/kotlin/ltd/hlaeja/test/container/KafkaTestContainer.kt

@@ -0,0 +1,11 @@
+package ltd.hlaeja.test.container
+
+import ltd.hlaeja.test.container.extension.KafkaTestExtension
+import org.junit.jupiter.api.extension.ExtendWith
+import org.springframework.test.context.ContextConfiguration
+
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+@ExtendWith(KafkaTestExtension::class)
+@ContextConfiguration(initializers = [KafkaTestExtension::class])
+annotation class KafkaTestContainer

src/main/kotlin/ltd/hlaeja/test/container/extension/KafkaTestExtension.kt

@@ -0,0 +1,21 @@
+package ltd.hlaeja.test.container.extension
+
+import ltd.hlaeja.test.container.kafka.TestContainerKafka
+import org.junit.jupiter.api.extension.BeforeAllCallback
+import org.junit.jupiter.api.extension.ExtensionContext
+import org.springframework.boot.test.util.TestPropertyValues
+import org.springframework.context.ApplicationContextInitializer
+import org.springframework.context.ConfigurableApplicationContext
+
+class KafkaTestExtension : BeforeAllCallback, ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    override fun initialize(applicationContext: ConfigurableApplicationContext) {
+        TestPropertyValues.of(TestContainerKafka.props()).applyTo(applicationContext.environment)
+    }
+
+    override fun beforeAll(context: ExtensionContext) {
+        if (!TestContainerKafka.kafka.isRunning) {
+            TestContainerKafka.kafka.start()
+        }
+    }
+}

src/main/kotlin/ltd/hlaeja/test/container/kafka/TestContainerKafka.kt

@@ -0,0 +1,13 @@
+package ltd.hlaeja.test.container.kafka
+
+import org.testcontainers.kafka.ConfluentKafkaContainer
+
+object TestContainerKafka {
+
+    val kafka: ConfluentKafkaContainer = ConfluentKafkaContainer("confluentinc/cp-kafka:8.0.0")
+        .withReuse(true)
+
+    fun props(): Map<String, String> = mapOf(
+        "spring.kafka.bootstrap-servers" to kafka.bootstrapServers,
+    )
+}