HDDS-14203. Use EndpointBuilder in all S3G unit tests (#9522)

Author: adoroszlai

hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/client/ObjectStoreStub.java

@@ -21,6 +21,7 @@
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.BUCKET_NOT_EMPTY;
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.BUCKET_NOT_FOUND;
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.VOLUME_NOT_FOUND;
+import static org.mockito.Mockito.mock;
 
 import java.io.IOException;
 import java.util.HashMap;
@@ -44,7 +45,7 @@ public class ObjectStoreStub extends ObjectStore {
   private Map<String, Boolean> bucketEmptyStatus = new HashMap<>();
 
   public ObjectStoreStub() {
-    super();
+    super(conf, mock(ClientProtocol.class));
   }
 
   public ObjectStoreStub(ConfigurationSource conf, ClientProtocol proxy) {

hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/EndpointBuilder.java

@@ -27,6 +27,7 @@
 import javax.ws.rs.core.UriInfo;
 import org.apache.hadoop.hdds.conf.OzoneConfiguration;
 import org.apache.hadoop.ozone.client.OzoneClient;
+import org.apache.hadoop.ozone.client.OzoneClientStub;
 import org.apache.hadoop.ozone.s3.RequestIdentifier;
 import org.apache.hadoop.ozone.s3.signature.SignatureInfo;
 
@@ -97,8 +98,8 @@ public EndpointBuilder<T> setSignatureInfo(SignatureInfo newSignatureInfo) {
   public T build() {
     T endpoint = base != null ? base : constructor.get();
 
-    if (ozoneClient != null) {
-      endpoint.setClient(ozoneClient);
+    if (endpoint.getClient() == null) {
+      endpoint.setClient(getClient());
     }
 
     final OzoneConfiguration config = getConfig();
@@ -109,10 +110,15 @@ public T build() {
     endpoint.setRequestIdentifier(identifier);
     endpoint.setSignatureInfo(signatureInfo);
 
+    endpoint.initialization();
+
     return endpoint;
   }
 
   protected OzoneClient getClient() {
+    if (ozoneClient == null) {
+      ozoneClient = new OzoneClientStub();
+    }
     return ozoneClient;
   }