Fix TestRestTemplate example in the doc

Closes gh-12132

spring-boot-docs/src/test/java/org/springframework/boot/web/client/SampleWebClientConfiguration.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012-2018 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.web.client;
+
+import java.net.URI;
+
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * A sample {@link SpringBootConfiguration} with an example controller.
+ *
+ * @author Stephane Nicoll
+ */
+@SpringBootConfiguration
+@ImportAutoConfiguration({ EmbeddedServletContainerAutoConfiguration.class,
+		ServerPropertiesAutoConfiguration.class,
+		DispatcherServletAutoConfiguration.class, WebMvcAutoConfiguration.class,
+		JacksonAutoConfiguration.class, HttpMessageConvertersAutoConfiguration.class })
+class SampleWebClientConfiguration {
+
+
+	@RestController
+	private static class ExampleController {
+
+		@RequestMapping("/example")
+		public ResponseEntity<String> example() {
+			return ResponseEntity.ok()
+					.location(URI.create("https://other.example.com/example"))
+					.body("test");
+		}
+
+	}
+
+}

spring-boot-docs/src/test/java/org/springframework/boot/web/client/SampleWebClientTests.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2012-2018 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.web.client;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.annotation.Bean;
+import org.springframework.http.HttpHeaders;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Example integration test that uses {@link TestRestTemplate}.
+ *
+ * @author Stephane Nicoll
+ */
+// tag::test[]
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+public class SampleWebClientTests {
+
+	@Autowired
+	private TestRestTemplate template;
+
+	@Test
+	public void testRequest() {
+		HttpHeaders headers = this.template.getForEntity("/example", String.class)
+				.getHeaders();
+		assertThat(headers.getLocation()).hasHost("other.example.com");
+	}
+
+	@TestConfiguration
+	static class Config {
+
+		@Bean
+		public RestTemplateBuilder restTemplateBuilder() {
+			return new RestTemplateBuilder()
+					.setConnectTimeout(1000)
+					.setReadTimeout(1000);
+		}
+
+	}
+
+}
+// end::test[]