BAEL-431 Exploring the Spring Boot TestRestTemplate (#1444)

* injecting beans

* XML-based configuration replaced with Java Config.

* [BAEL-431] Exploring TestRestTemplate.

* Revert of evaluation task "XML-based configuration replaced with Java Config."

This reverts commit 66471cf0574c85f8ff514ec4caf5ba44ebba1a74.

* Revert of evaluation task "injecting beans"

This reverts commit d2ac20185e636245bc0ae0b4ccb952965de88e28.

* [BAEL-431] fix to the tests in TestRestTemplateBasicLiveTest.

spring-rest/pom.xml

@@ -29,6 +29,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-devtools</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-test</artifactId>
+        </dependency>
 
         <!-- Spring -->
 

spring-rest/src/test/java/org/baeldung/client/TestRestTemplateBasicLiveTest.java

@@ -0,0 +1,118 @@
+package org.baeldung.client;
+
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.client.RestTemplate;
+
+import static org.baeldung.client.Consts.APPLICATION_PORT;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+public class TestRestTemplateBasicLiveTest {
+
+    private RestTemplate restTemplate;
+    private static final String FOO_RESOURCE_URL = "http://localhost:" + APPLICATION_PORT + "/spring-rest/myfoos";
+    private static final String URL_SECURED_BY_AUTHENTICATION = "http://browserspy.dk/password-ok.php";
+    private static final String BASE_URL = "http://localhost:" + APPLICATION_PORT + "/spring-rest";
+
+    @Before
+    public void beforeTest() {
+        restTemplate = new RestTemplate();
+    }
+
+    // GET
+    @Test
+    public void givenTestRestTemplate_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate();
+        ResponseEntity<String> response = testRestTemplate.getForEntity(FOO_RESOURCE_URL + "/1", String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenRestTemplateWrapper_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate(restTemplate);
+        ResponseEntity<String> response = testRestTemplate.getForEntity(FOO_RESOURCE_URL + "/1", String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenRestTemplateBuilderWrapper_whenSendGetForEntity_thenStatusOk() {
+        RestTemplateBuilder restTemplateBuilder = new RestTemplateBuilder();
+        restTemplateBuilder.build();
+        TestRestTemplate testRestTemplate = new TestRestTemplate(restTemplateBuilder);
+        ResponseEntity<String> response = testRestTemplate.getForEntity(FOO_RESOURCE_URL + "/1", String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenRestTemplateWrapperWithCredentials_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate(restTemplate, "test", "test");
+        ResponseEntity<String> response = testRestTemplate.getForEntity(URL_SECURED_BY_AUTHENTICATION + "/1",
+                String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenTestRestTemplateWithCredentials_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate("test", "test");
+        ResponseEntity<String> response = testRestTemplate.getForEntity(URL_SECURED_BY_AUTHENTICATION + "/1",
+                String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenTestRestTemplateWithBasicAuth_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate();
+        ResponseEntity<String> response = testRestTemplate.withBasicAuth("test", "test").
+                getForEntity(URL_SECURED_BY_AUTHENTICATION + "/1", String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    @Test
+    public void givenTestRestTemplateWithCredentialsAndEnabledCookies_whenSendGetForEntity_thenStatusOk() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate("test", "test", TestRestTemplate.
+                HttpClientOption.ENABLE_COOKIES);
+        ResponseEntity<String> response = testRestTemplate.getForEntity(URL_SECURED_BY_AUTHENTICATION + "/1",
+                String.class);
+        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
+    }
+
+    // HEAD
+    @Test
+    public void givenFooService_whenCallHeadForHeaders_thenReceiveAllHeaders() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate();
+        final HttpHeaders httpHeaders = testRestTemplate.headForHeaders(FOO_RESOURCE_URL);
+        assertTrue(httpHeaders.getContentType().includes(MediaType.APPLICATION_JSON));
+    }
+
+    // POST
+    @Test
+    public void givenService_whenPostForObject_thenCreatedObjectIsReturned() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate("test", "test");
+        final RequestBody body = RequestBody.create(okhttp3.MediaType.parse("text/html; charset=utf-8"),
+                "{\"id\":1,\"name\":\"Jim\"}");
+        final Request request = new Request.Builder().url(BASE_URL + "/users/detail").post(body).build();
+        Object response = testRestTemplate.postForObject(URL_SECURED_BY_AUTHENTICATION, request, String.class);
+        assertTrue(response.toString().contains("Success"));
+    }
+
+    // PUT
+    @Test
+    public void givenService_whenPutForObject_thenCreatedObjectIsReturned() {
+        TestRestTemplate testRestTemplate = new TestRestTemplate("test", "test");
+        final RequestBody body = RequestBody.create(okhttp3.MediaType.parse("text/html; charset=utf-8"),
+                "{\"id\":1,\"name\":\"Jim\"}");
+        final Request request = new Request.Builder().url(BASE_URL + "/users/detail").post(body).build();
+        testRestTemplate.put(URL_SECURED_BY_AUTHENTICATION, request, String.class);
+    }
+
+}