BAEL-3682 specify accept header to fix ambiguity of message converters in case XML converter added

spring-boot-rest/src/test/java/com/baeldung/common/web/AbstractBasicLiveTest.java

@@ -24,6 +24,7 @@ import com.google.common.net.HttpHeaders;
 import io.restassured.RestAssured;
 import io.restassured.http.ContentType;
 import io.restassured.response.Response;
+import org.springframework.http.MediaType;
 
 public abstract class AbstractBasicLiveTest<T extends Serializable> extends AbstractLiveTest<T> {
 
@@ -36,7 +37,7 @@ public abstract class AbstractBasicLiveTest<T extends Serializable> extends Abst
     @Test
     public void whenResourcesAreRetrievedPaged_then200IsReceived() {
         create();
-        
+
         final Response response = RestAssured.get(getURL() + "?page=0&size=10");
 
         assertThat(response.getStatusCode(), is(200));
@@ -54,7 +55,8 @@ public abstract class AbstractBasicLiveTest<T extends Serializable> extends Abst
     public void givenResourcesExist_whenFirstPageIsRetrieved_thenPageContainsResources() {
         create();
 
-        final Response response = RestAssured.get(getURL() + "?page=0&size=10");
+        final Response response = RestAssured.given()
+          .accept(MediaType.APPLICATION_JSON_VALUE).get(getURL() + "?page=0&size=10");
 
         assertFalse(response.body().as(List.class).isEmpty());
     }
@@ -64,7 +66,7 @@ public abstract class AbstractBasicLiveTest<T extends Serializable> extends Abst
         create();
         create();
         create();
-        
+
         final Response response = RestAssured.get(getURL() + "?page=0&size=2");
 
         final String uriToNextPage = extractURIByRel(response.getHeader(HttpHeaders.LINK), "next");
@@ -95,7 +97,7 @@ public abstract class AbstractBasicLiveTest<T extends Serializable> extends Abst
         create();
         create();
         create();
-        
+
         final Response first = RestAssured.get(getURL() + "?page=0&size=2");
         final String uriToLastPage = extractURIByRel(first.getHeader(HttpHeaders.LINK), "last");
 
@@ -104,7 +106,7 @@ public abstract class AbstractBasicLiveTest<T extends Serializable> extends Abst
         final String uriToNextPage = extractURIByRel(response.getHeader(HttpHeaders.LINK), "next");
         assertNull(uriToNextPage);
     }
-    
+
     // etags
 
     @Test

spring-boot-rest/src/test/java/com/baeldung/web/FooControllerAppIntegrationTest.java

@@ -11,13 +11,12 @@ import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.web.servlet.MockMvc;
 
 /**
- *
- *  We'll start the whole context, but not the server. We'll mock the REST calls instead.
- *
+ * We'll start the whole context, but not the server. We'll mock the REST calls instead.
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest
@@ -31,16 +30,18 @@ public class FooControllerAppIntegrationTest {
     private IFooDao fooDao;
 
     @Before
-    public void setup(){
+    public void setup() {
         this.fooDao.deleteAll();
     }
 
     @Test
     public void whenFindPaginatedRequest_thenEmptyResponse() throws Exception {
-        this.mockMvc.perform(get("/foos").param("page", "0")
-            .param("size", "2"))
-            .andExpect(status().isOk())
-            .andExpect(content().json("[]"));
+        this.mockMvc.perform(get("/foos")
+          .param("page", "0")
+          .param("size", "2")
+          .accept(MediaType.APPLICATION_JSON))
+          .andExpect(status().isOk())
+          .andExpect(content().json("[]"));
     }
 
 }

spring-boot-rest/src/test/java/com/baeldung/web/FooControllerCustomEtagIntegrationTest.java

@@ -40,7 +40,7 @@ public class FooControllerCustomEtagIntegrationTest {
     private static String createFooJson() throws Exception {
         return serializeFoo(new Foo(randomAlphabetic(6)));
     }
-    
+
     private static Foo deserializeFoo(String fooJson) throws Exception {
         ObjectMapper mapper = new ObjectMapper();
         return mapper.readValue(fooJson, Foo.class);
@@ -97,7 +97,8 @@ public class FooControllerCustomEtagIntegrationTest {
             .getResponse()
             .getHeader(HttpHeaders.LOCATION);
         ResultActions findOneResponse = this.mvc
-            .perform(get(createdResourceUri + CUSTOM_ETAG_ENDPOINT_SUFFIX).contentType(MediaType.APPLICATION_JSON));
+            .perform(get(createdResourceUri + CUSTOM_ETAG_ENDPOINT_SUFFIX)
+              .contentType(MediaType.APPLICATION_JSON).accept(MediaType.APPLICATION_JSON));
         String etag = findOneResponse.andReturn().getResponse().getHeader(HttpHeaders.ETAG);
         Foo createdFoo = deserializeFoo(findOneResponse.andReturn().getResponse().getContentAsString());
         createdFoo.setName("updated name");

spring-boot-rest/src/test/java/com/baeldung/web/FooControllerWebLayerIntegrationTest.java

@@ -20,6 +20,7 @@ import org.springframework.boot.test.mock.mockito.MockBean;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageImpl;
+import org.springframework.http.MediaType;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.test.web.servlet.MockMvc;
 
@@ -30,7 +31,7 @@ import com.baeldung.web.exception.CustomException1;
 import com.baeldung.web.hateoas.event.PaginatedResultsRetrievedEvent;
 
 /**
- * 
+ *
  *  We'll start only the web layer.
  *
  */
@@ -54,20 +55,22 @@ public class FooControllerWebLayerIntegrationTest {
         doNothing().when(publisher)
             .publishEvent(any(PaginatedResultsRetrievedEvent.class));
 
-        this.mockMvc.perform(get("/foos").param("page", "0")
-            .param("size", "2"))
-            .andExpect(status().isOk())
-            .andExpect(jsonPath("$",Matchers.hasSize(1)));
+        this.mockMvc.perform(get("/foos")
+          .param("page", "0")
+          .param("size", "2")
+          .accept(MediaType.APPLICATION_JSON))
+          .andExpect(status().isOk())
+          .andExpect(jsonPath("$", Matchers.hasSize(1)));
     }
-    
+
     @Test
     public void delete_forException_fromService() throws Exception {
         Mockito.when(service.findAll()).thenThrow(new CustomException1());
         this.mockMvc.perform(get("/foos")).andDo(h ->  {
             final Exception expectedException = h.getResolvedException();
             Assert.assertTrue(expectedException instanceof CustomException1);
-            
+
         });
     }
-    
+
 }

spring-boot-rest/src/test/java/com/baeldung/web/FooPageableLiveTest.java

@@ -11,6 +11,7 @@ import java.util.List;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.springframework.http.MediaType;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@@ -68,7 +69,9 @@ public class FooPageableLiveTest extends AbstractBasicLiveTest<Foo> {
     public void givenResourcesExist_whenFirstPageIsRetrieved_thenPageContainsResources() {
         create();
 
-        final Response response = RestAssured.get(getPageableURL() + "?page=0&size=10");
+        final Response response = RestAssured.given()
+          .accept(MediaType.APPLICATION_JSON_VALUE)
+          .get(getPageableURL() + "?page=0&size=10");
 
         assertFalse(response.body().as(List.class).isEmpty());
     }