Decorate test containers so tests are skipped without Docker

Closes gh-15901
Closes gh-15638

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/cassandra/CassandraDataAutoConfigurationIntegrationTests.java

@@ -28,6 +28,7 @@ import org.springframework.boot.autoconfigure.AutoConfigurationPackages;
 import org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration;
 import org.springframework.boot.autoconfigure.data.cassandra.city.City;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.boot.testsupport.testcontainers.SkippableContainer;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.data.cassandra.config.CassandraSessionFactoryBean;
 import org.springframework.data.cassandra.config.SchemaAction;
@@ -43,7 +44,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 public class CassandraDataAutoConfigurationIntegrationTests {
 
 	@ClassRule
-	public static CassandraContainer<?> cassandra = new CassandraContainer<>();
+	public static SkippableContainer<CassandraContainer<?>> cassandra = new SkippableContainer<>(
+			CassandraContainer::new);
 
 	private AnnotationConfigApplicationContext context;
 
@@ -51,7 +53,8 @@ public class CassandraDataAutoConfigurationIntegrationTests {
 	public void setUp() {
 		this.context = new AnnotationConfigApplicationContext();
 		TestPropertyValues
-				.of("spring.data.cassandra.port=" + cassandra.getFirstMappedPort(),
+				.of("spring.data.cassandra.port="
+						+ cassandra.getContainer().getFirstMappedPort(),
 						"spring.data.cassandra.read-timeout=24000",
 						"spring.data.cassandra.connect-timeout=10000")
 				.applyTo(this.context.getEnvironment());
@@ -96,7 +99,8 @@ public class CassandraDataAutoConfigurationIntegrationTests {
 
 	private void createTestKeyspaceIfNotExists() {
 		Cluster cluster = Cluster.builder().withoutJMXReporting()
-				.withPort(cassandra.getFirstMappedPort()).addContactPoint("localhost")
+				.withPort(cassandra.getContainer().getFirstMappedPort())
+				.addContactPoint(cassandra.getContainer().getContainerIpAddress())
 				.build();
 		try (Session session = cluster.connect()) {
 			session.execute("CREATE KEYSPACE IF NOT EXISTS boot_test"

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/data/neo4j/DataNeo4jTestIntegrationTests.java

@@ -18,13 +18,17 @@ package org.springframework.boot.test.autoconfigure.data.neo4j;
 
 import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
 import org.junit.runner.RunWith;
+import org.junit.runners.model.Statement;
 import org.neo4j.ogm.session.Session;
 import org.testcontainers.containers.Neo4jContainer;
 
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.boot.testsupport.testcontainers.SkippableContainer;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -46,9 +50,18 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 @DataNeo4jTest
 public class DataNeo4jTestIntegrationTests {
 
+	public static SkippableContainer<Neo4jContainer<?>> neo4j = new SkippableContainer<Neo4jContainer<?>>(
+			() -> new Neo4jContainer<>().withAdminPassword(null));
+
 	@ClassRule
-	public static Neo4jContainer<?> neo4j = new Neo4jContainer<>()
+	public static TestRule skippableContainer = new TestRule() {
-			.withAdminPassword(null);
+
+		@Override
+		public Statement apply(Statement base, Description description) {
+			return neo4j.apply(base, description);
+		}
+
+	};
 
 	@Autowired
 	private Session session;
@@ -81,7 +94,8 @@ public class DataNeo4jTestIntegrationTests {
 		@Override
 		public void initialize(
 				ConfigurableApplicationContext configurableApplicationContext) {
-			TestPropertyValues.of("spring.data.neo4j.uri=" + neo4j.getBoltUrl())
+			TestPropertyValues
+					.of("spring.data.neo4j.uri=" + neo4j.getContainer().getBoltUrl())
 					.applyTo(configurableApplicationContext.getEnvironment());
 		}
 

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/data/neo4j/DataNeo4jTestPropertiesIntegrationTests.java

@@ -23,6 +23,7 @@ import org.testcontainers.containers.Neo4jContainer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.boot.testsupport.testcontainers.SkippableContainer;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.core.env.Environment;
@@ -43,8 +44,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 public class DataNeo4jTestPropertiesIntegrationTests {
 
 	@ClassRule
-	public static Neo4jContainer<?> neo4j = new Neo4jContainer<>()
+	public static SkippableContainer<Neo4jContainer<?>> neo4j = new SkippableContainer<Neo4jContainer<?>>(
-			.withAdminPassword(null);
+			() -> new Neo4jContainer<>().withAdminPassword(null));
 
 	@Autowired
 	private Environment environment;
@@ -60,7 +61,8 @@ public class DataNeo4jTestPropertiesIntegrationTests {
 		@Override
 		public void initialize(
 				ConfigurableApplicationContext configurableApplicationContext) {
-			TestPropertyValues.of("spring.data.neo4j.uri=" + neo4j.getBoltUrl())
+			TestPropertyValues
+					.of("spring.data.neo4j.uri=" + neo4j.getContainer().getBoltUrl())
 					.applyTo(configurableApplicationContext.getEnvironment());
 		}
 

spring-boot-project/spring-boot-test-autoconfigure/src/test/java/org/springframework/boot/test/autoconfigure/data/neo4j/DataNeo4jTestWithIncludeFilterIntegrationTests.java

@@ -23,6 +23,7 @@ import org.testcontainers.containers.Neo4jContainer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.boot.testsupport.testcontainers.SkippableContainer;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.ComponentScan.Filter;
@@ -44,8 +45,8 @@ import static org.assertj.core.api.Assertions.assertThat;
 public class DataNeo4jTestWithIncludeFilterIntegrationTests {
 
 	@ClassRule
-	public static Neo4jContainer<?> neo4j = new Neo4jContainer<>()
+	public static SkippableContainer<Neo4jContainer<?>> neo4j = new SkippableContainer<Neo4jContainer<?>>(
-			.withAdminPassword(null);
+			() -> new Neo4jContainer<>().withAdminPassword(null));
 
 	@Autowired
 	private ExampleService service;
@@ -61,7 +62,8 @@ public class DataNeo4jTestWithIncludeFilterIntegrationTests {
 		@Override
 		public void initialize(
 				ConfigurableApplicationContext configurableApplicationContext) {
-			TestPropertyValues.of("spring.data.neo4j.uri=" + neo4j.getBoltUrl())
+			TestPropertyValues
+					.of("spring.data.neo4j.uri=" + neo4j.getContainer().getBoltUrl())
 					.applyTo(configurableApplicationContext.getEnvironment());
 		}
 

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/testcontainers/SkippableContainer.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2012-2019 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
+ *
+ *      http://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.testsupport.testcontainers;
+
+import java.util.function.Supplier;
+
+import org.junit.AssumptionViolatedException;
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+import org.testcontainers.DockerClientFactory;
+import org.testcontainers.containers.FailureDetectingExternalResource;
+import org.testcontainers.containers.GenericContainer;
+
+/**
+ * A {@link GenericContainer} decorator that skips test execution when Docker is not
+ * available.
+ *
+ * @param <T> type of the underlying container
+ * @author Andy Wilkinson
+ */
+public class SkippableContainer<T> implements TestRule {
+
+	private final Supplier<T> containerFactory;
+
+	private T container;
+
+	public SkippableContainer(Supplier<T> containerFactory) {
+		this.containerFactory = containerFactory;
+	}
+
+	@Override
+	public Statement apply(Statement base, Description description) {
+		try {
+			DockerClientFactory.instance().client();
+		}
+		catch (Throwable ex) {
+			return new SkipStatement();
+		}
+		this.container = this.containerFactory.get();
+		return ((FailureDetectingExternalResource) this.container).apply(base,
+				description);
+	}
+
+	public T getContainer() {
+		if (this.container == null) {
+			throw new IllegalStateException(
+					"Container cannot be accessed prior to test invocation");
+		}
+		return this.container;
+	}
+
+	private static class SkipStatement extends Statement {
+
+		@Override
+		public void evaluate() {
+			throw new AssumptionViolatedException(
+					"Could not find a valid Docker environment.");
+		}
+
+	}
+
+}