Add Kotlin example for @Testcontainers

See gh-40905

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/testing/testcontainers/dynamicproperties/MyIntegrationTests.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.testing.testcontainers.dynamicproperties;
+
+import org.junit.jupiter.api.Test
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.context.DynamicPropertyRegistry
+import org.springframework.test.context.DynamicPropertySource
+import org.testcontainers.containers.Neo4jContainer
+import org.testcontainers.junit.jupiter.Container
+import org.testcontainers.junit.jupiter.Testcontainers
+
+@Testcontainers
+@SpringBootTest
+class MyIntegrationTests {
+
+	@Test
+	fun myTest() {
+		// ...
+	}
+
+	companion object {
+		@Container
+		@JvmStatic
+		val neo4j = Neo4jContainer("neo4j:5");
+
+		@DynamicPropertySource
+		@JvmStatic
+		fun neo4jProperties(registry: DynamicPropertyRegistry) {
+			registry.add("spring.neo4j.uri") { neo4j.boltUrl }
+		}
+	}
+}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/testing/testcontainers/serviceconnections/MyIntegrationTests.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.testing.testcontainers.serviceconnections;
+
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.Neo4jContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+
+@Testcontainers
+@SpringBootTest
+class MyIntegrationTests {
+
+	@Test
+	fun myTest() {
+		// ...
+	}
+
+	companion object {
+		@Container
+		@ServiceConnection
+		@JvmStatic
+		val neo4j = Neo4jContainer("neo4j:5");
+	}
+}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/testing/testcontainers/serviceconnections/MyRedisConfiguration.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2012-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.testing.testcontainers.serviceconnections;
+
+import org.springframework.boot.test.context.TestConfiguration
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection
+import org.springframework.context.annotation.Bean
+import org.testcontainers.containers.GenericContainer
+
+@TestConfiguration(proxyBeanMethods = false)
+class MyRedisConfiguration {
+	@Bean
+	@ServiceConnection(name = "redis")
+	fun redisContainer(): GenericContainer<*> {
+		return GenericContainer("redis:7")
+	}
+}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/testing/testcontainers/vanilla/MyIntegrationTests.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.docs.testing.testcontainers.vanilla;
+
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.Neo4jContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection
+
+@Testcontainers
+@SpringBootTest
+class MyIntegrationTests {
+
+	@Test
+	fun myTest() {
+		// ...
+	}
+
+	companion object {
+		@Container
+		@JvmStatic
+		val neo4j = Neo4jContainer("neo4j:5");
+	}
+}
+