Mods to use concrete FakeResponse instead of a Mockito Spy FakeResponse (#370).

src/test/java/org/gitlab4j/api/FakeResponse.java

 package org.gitlab4j.api;
 
 import java.io.ByteArrayInputStream;
+import java.lang.annotation.Annotation;
+import java.net.URI;
+import java.util.Date;
 import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
 
+import javax.ws.rs.core.EntityTag;
 import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Link;
+import javax.ws.rs.core.Link.Builder;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.MultivaluedMap;
+import javax.ws.rs.core.NewCookie;
 import javax.ws.rs.core.Response;
 
 /**
- * This class can be used as a spy for Mockito to test the individual APIs
+ * This class can be used as a concrete mock to test the individual APIs
  * getXxxxx() methods without the need to have a GitLab server available.
  * 
  * Supports getXxxxx() methods that return a List of items, single items,
  * Optional items, and Pagers of items.
  */
-public abstract class FakeResponse extends Response {
+public class FakeResponse extends Response {
 
     private List<?> responseList;
     private Object responseItem;
@@ -51,8 +63,10 @@ public abstract class FakeResponse extends Response {
         this.perPage = perPage;
     }
 
-    // The below methods allow this abstract class to act as a fake Resource
-    // instance.
+
+    /******************************************************************************
+     * The following methods allow this class to act as a fake Resource instance.
+     ******************************************************************************/
 
     @SuppressWarnings("unchecked")
     @Override
@@ -93,4 +107,115 @@ public abstract class FakeResponse extends Response {
     public int getStatus() {
         return (200);
     }
+
+
+    /**************************************************************************************************
+     * The remaining methods are stubbed so we can create an instance of this class. They are simply
+     * stubs, but needed to do this because the Mockito Spy annotation does not work without JAXB
+     * on Java 11+ and did not wish to pull in the JAXB module even for testing. 
+     **************************************************************************************************/
+
+    @Override
+    public StatusType getStatusInfo() {
+        return null;
+    }
+
+    @Override
+    public <T> T readEntity(Class<T> entityType, Annotation[] annotations) {
+        return null;
+    }
+
+    @Override
+    public <T> T readEntity(GenericType<T> entityType, Annotation[] annotations) {
+        return null;
+    }
+
+    @Override
+    public boolean hasEntity() {
+        return false;
+    }
+
+    @Override
+    public boolean bufferEntity() {
+        return false;
+    }
+
+    @Override
+    public void close() {
+    }
+
+    @Override
+    public MediaType getMediaType() {
+        return null;
+    }
+
+    @Override
+    public Locale getLanguage() {
+        return null;
+    }
+
+    @Override
+    public int getLength() {
+        return 0;
+    }
+
+    @Override
+    public Set<String> getAllowedMethods() {
+        return null;
+    }
+
+    @Override
+    public Map<String, NewCookie> getCookies() {
+        return null;
+    }
+
+    @Override
+    public EntityTag getEntityTag() {
+        return null;
+    }
+
+    @Override
+    public Date getDate() {
+        return null;
+    }
+
+    @Override
+    public Date getLastModified() {
+        return null;
+    }
+
+    @Override
+    public URI getLocation() {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getLinks() {
+        return null;
+    }
+
+    @Override
+    public boolean hasLink(String relation) {
+        return false;
+    }
+
+    @Override
+    public Link getLink(String relation) {
+        return null;
+    }
+
+    @Override
+    public Builder getLinkBuilder(String relation) {
+        return null;
+    }
+
+    @Override
+    public MultivaluedMap<String, Object> getMetadata() {
+        return null;
+    }
+
+    @Override
+    public MultivaluedMap<String, String> getStringHeaders() {
+        return null;
+    }
 }
\ No newline at end of file

src/test/java/org/gitlab4j/api/TestCommitDiscussionsApi.java

@@ -20,15 +20,14 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestCommitDiscussionsApi implements Constants {
 
     private static final String COMMIT_SHA = "abcdef1234567890";
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @Before
     public void setUp() throws Exception {

src/test/java/org/gitlab4j/api/TestEpicDiscussionsApi.java

@@ -20,14 +20,13 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestEpicDiscussionsApi implements Constants {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @Before
     public void setUp() throws Exception {

src/test/java/org/gitlab4j/api/TestIssueDiscussionsApi.java

@@ -20,14 +20,13 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestIssueDiscussionsApi implements Constants {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @Before
     public void setUp() throws Exception {

src/test/java/org/gitlab4j/api/TestMergeRequestApi.java

 package org.gitlab4j.api;
 
+import static org.hamcrest.Matchers.hasEntry;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import java.util.Collections;
+
+import javax.ws.rs.core.MultivaluedMap;
+
 import org.gitlab4j.api.models.MergeRequest;
 import org.junit.Before;
 import org.junit.Test;
@@ -8,38 +19,23 @@ import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 
-import javax.ws.rs.core.MultivaluedMap;
-import javax.ws.rs.core.Response;
-import java.util.Collections;
-
-import static org.hamcrest.Matchers.hasEntry;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
-import static org.mockito.Matchers.any;
-import static org.mockito.Mockito.when;
-import static org.mockito.MockitoAnnotations.initMocks;
-
 public class TestMergeRequestApi {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Mock private Response response;
-
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @SuppressWarnings("deprecation")
     @Before
     public void setUp() throws Exception {
         initMocks(this);
-
+        response.init(MergeRequest.class, "merge-request.json", null);
         when(gitLabApi.getApiClient()).thenReturn(gitLabApiClient);
 
         when(gitLabApiClient.validateSecretToken(any())).thenReturn(true);
         when(gitLabApiClient.put(attributeCaptor.capture(), Mockito.<Object>anyVararg()))
                 .thenReturn(response);
-
-        when(response.getStatus()).thenReturn(200);
-        when(response.getEntity()).thenReturn(new MergeRequest());
     }
 
     @Test

src/test/java/org/gitlab4j/api/TestMergeRequestDiscussionsApi.java

@@ -20,19 +20,18 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestMergeRequestDiscussionsApi implements Constants {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @Before
     public void setUp() throws Exception {
         initMocks(this);
-        response.init(Discussion.class,  null,  "merge-request-discussions.json");        
+        response.init(Discussion.class,  null,  "merge-request-discussions.json");
         when(gitLabApi.getApiClient()).thenReturn(gitLabApiClient);
         when(gitLabApiClient.validateSecretToken(any())).thenReturn(true);
         when(gitLabApiClient.get(attributeCaptor.capture(), Mockito.<Object>any())).thenReturn(response);

src/test/java/org/gitlab4j/api/TestSnippetDiscussionsApi.java

@@ -20,14 +20,13 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestSnippetDiscussionsApi implements Constants {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     @Before
     public void setUp() throws Exception {

src/test/java/org/gitlab4j/api/TestStreams.java

 package org.gitlab4j.api;
 
 import static java.util.Comparator.comparing;
+import static java.util.stream.Collectors.toList;
 import static org.gitlab4j.api.JsonUtils.compareJson;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -10,8 +11,6 @@ import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.when;
 import static org.mockito.MockitoAnnotations.initMocks;
 
-import static java.util.stream.Collectors.toList;
-
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -25,14 +24,13 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.Spy;
 
 public class TestStreams implements Constants {
 
     @Mock private GitLabApi gitLabApi;
     @Mock private GitLabApiClient gitLabApiClient;
-    @Spy private FakeResponse response;
     @Captor private ArgumentCaptor<MultivaluedMap<String, String>> attributeCaptor;
+    private FakeResponse response = new FakeResponse();
 
     static private List<User> sortedUsers;