Disable tests that use Docker when Docker is unavailable

Closes gh-19616

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

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2012-2020 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.testsupport.testcontainers;
+
+import org.junit.jupiter.api.extension.ConditionEvaluationResult;
+import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.testcontainers.DockerClientFactory;
+
+/**
+ * An {@link ExecutionCondition} that disables execution if Docker is unavailable.
+ *
+ * @author Andy Wilkinson
+ */
+public class DisabledIfDockerUnavailable implements ExecutionCondition {
+
+	@Override
+	public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) {
+		System.out.println("Checking Docker's availability");
+		if (isDockerAvailable()) {
+			System.out.println("Docker available");
+			return ConditionEvaluationResult.enabled("Docker is available");
+		}
+		System.out.println("Docker unavailable");
+		return ConditionEvaluationResult.disabled("Docker is not available");
+	}
+
+	private boolean isDockerAvailable() {
+		try {
+			DockerClientFactory.instance().client();
+			return true;
+		}
+		catch (Throwable ex) {
+			return false;
+		}
+	}
+
+}

spring-boot-tests/spring-boot-deployment-tests/build.gradle

@@ -13,6 +13,7 @@ dependencies {
 
 	intTestImplementation enforcedPlatform(project(path: ":spring-boot-project:spring-boot-parent"))
 	intTestImplementation project(':spring-boot-project:spring-boot-starters:spring-boot-starter-test')
+	intTestImplementation project(':spring-boot-project:spring-boot-tools:spring-boot-test-support')
 	intTestImplementation 'org.apache.httpcomponents:httpasyncclient'
 	intTestImplementation 'org.awaitility:awaitility'
 	intTestImplementation 'org.testcontainers:testcontainers'

spring-boot-tests/spring-boot-deployment-tests/src/intTest/java/sample/DeploymentIntegrationTests.java

@@ -26,12 +26,14 @@ import org.apache.http.impl.client.HttpClients;
 import org.apache.http.impl.client.StandardHttpRequestRetryHandler;
 import org.awaitility.Awaitility;
 import org.awaitility.core.ConditionTimeoutException;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.testcontainers.containers.GenericContainer;
 import org.testcontainers.images.builder.ImageFromDockerfile;
 
 import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.testsupport.testcontainers.DisabledIfDockerUnavailable;
 import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -42,6 +44,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  * Deployment integration tests.
  */
+@ExtendWith(DisabledIfDockerUnavailable.class)
 class DeploymentIntegrationTests {
 
 	@ParameterizedTest

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/build.gradle

@@ -15,6 +15,7 @@ dependencies {
 	app project(path: ':spring-boot-project:spring-boot-starters:spring-boot-starter-web', configuration: 'mavenRepository')
 
 	intTestImplementation enforcedPlatform(project(':spring-boot-project:spring-boot-parent'))
+	intTestImplementation project(':spring-boot-project:spring-boot-tools:spring-boot-test-support')
 	intTestImplementation project(':spring-boot-project:spring-boot-starters:spring-boot-starter-test')
 	intTestImplementation 'org.testcontainers:testcontainers'
 }

spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/SysVinitLaunchScriptIntegrationTests.java

@@ -24,6 +24,7 @@ import java.util.regex.Pattern;
 
 import org.assertj.core.api.Condition;
 import org.junit.jupiter.api.Assumptions;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.testcontainers.containers.GenericContainer;
@@ -32,6 +33,7 @@ import org.testcontainers.images.builder.ImageFromDockerfile;
 import org.testcontainers.utility.MountableFile;
 
 import org.springframework.boot.ansi.AnsiColor;
+import org.springframework.boot.testsupport.testcontainers.DisabledIfDockerUnavailable;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.Matchers.containsString;
@@ -42,6 +44,7 @@ import static org.hamcrest.Matchers.containsString;
  * @author Andy Wilkinson
  * @author Ali Shahbour
  */
+@ExtendWith(DisabledIfDockerUnavailable.class)
 class SysVinitLaunchScriptIntegrationTests {
 
 	private static final char ESC = 27;