Polish “Improve documentation for testing with Spock”

Closes gh-6539

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -5369,42 +5369,30 @@ automatically generate the default snippets:
 ==== Using Spock to test Spring Boot applications
 If you wish to use Spock to test a Spring Boot application you should add a dependency
 on Spock's `spock-spring` module to your application's build. `spock-spring` integrates
-Spring's test framework into Spock.
+Spring's test framework into Spock. Exactly how you can use Spock to test a Spring Boot
+application depends on the version of Spock that you are using.
 
-NOTE: The annotations <<boot-features-testing-spring-boot-applications,described above>>
-can be used with Spock 1.1, i.e. you can annotate your `Specification` with
+NOTE: Spring Boot provides dependency management for Spock 1.0. If you wish to use Spock
+1.1 you should <<howto.adoc#howto-customize-dependency-versions,override the
+`spock.version` property>> in your `build.gradle` or `pom.xml` file.
+
+When using Spock 1.1, the annotations <<boot-features-testing-spring-boot-applications,
+described above>> can only be used and you can annotate your `Specification` with
 `@SpringBootTest` to suit the needs of your tests.
-When using Spock 1.0 @SpringbootTest will not work for a web project. You need to use
-'@SpringApplicationConfiguration()' and '@WebIntegrationTest(randomPort = true)'
-If you want to autowire a TestRestTemplate you will have to create a bean like:
+
+When using Spock 1.0, `@SpringBootTest` will not work for a web project. You need to use
+`@SpringApplicationConfiguration` and `@WebIntegrationTest(randomPort = true)`. Being
+unable to use `@SpringBootTest` means that you also lose the auto-configured
+`TestRestTemplate` bean. You can create an equivalent bean yourself using the following
+configuration:
+
 [source,java,indent=0]
 ----
-	public class TestConfiguration {
-        @Autowired
-        ApplicationContext applicationContext;
-
-        @Bean
-        TestRestTemplate restTemplate(){
-            RestTemplateBuilder builder = getRestTemplateBuilder(applicationContext);
-            TestRestTemplate template = new TestRestTemplate(builder.build());
-            template.setUriTemplateHandler(
-                    new LocalHostUriTemplateHandler(applicationContext.getEnvironment()));
-            return template;
-        }
-
-        private RestTemplateBuilder getRestTemplateBuilder(
-                ApplicationContext applicationContext) {
-            try {
-                return applicationContext.getBean(RestTemplateBuilder.class);
-            }
-            catch (NoSuchBeanDefinitionException ex) {
-                return new RestTemplateBuilder();
-            }
+include::{code-examples}/test/spock/SpockTestRestTemplateExample.java[tag=test-rest-template-configuration]
 ----
 
 
 
-
 [[boot-features-test-utilities]]
 === Test utilities
 A few test utility classes are packaged as part of `spring-boot` that are generally

spring-boot-docs/src/main/java/org/springframework/boot/test/spock/SpockTestRestTemplateExample.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2012-2016 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.test.spock;
+
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.LocalHostUriTemplateHandler;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.Environment;
+
+/**
+ * Example configuration for using TestRestTemplate with Spock 1.0 when
+ * {@link SpringBootTest} cannot be used.
+ *
+ * @author Andy Wilkinson
+ */
+public class SpockTestRestTemplateExample {
+
+	/**
+	 * Test configuration for a {@link TestRestTemplate}.
+	 */
+	// tag::test-rest-template-configuration[]
+	@Configuration
+	static class TestRestTemplateConfiguration {
+
+		@Bean
+		public TestRestTemplate testRestTemplate(
+				ObjectProvider<RestTemplateBuilder> builderProvider,
+				Environment environment) {
+			RestTemplateBuilder builder = builderProvider.getIfAvailable();
+			TestRestTemplate template = builder == null ? new TestRestTemplate()
+					: new TestRestTemplate(builder.build());
+			template.setUriTemplateHandler(new LocalHostUriTemplateHandler(environment));
+			return template;
+		}
+
+	}
+	// end::test-rest-template-configuration[]
+
+}

spring-boot-docs/src/test/java/org/springframework/boot/test/spock/SpockTestRestTemplateExampleTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2012-2016 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.test.spock;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link SpockTestRestTemplateExample}.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = SpockTestRestTemplateExample.TestRestTemplateConfiguration.class)
+public class SpockTestRestTemplateExampleTests {
+
+	@Autowired
+	private ApplicationContext applicationContext;
+
+	@Test
+	public void testRestTemplateBeanIsAvailable() {
+		assertThat(this.applicationContext.getBeansOfType(TestRestTemplate.class))
+				.hasSize(1);
+	}
+
+}