Add @ScyllaOnly annotation

Needed for Scylla Cloud tests which won't work with cassandra ccm clusters.

Author: Bouncheck

driver-core/src/test/java/com/datastax/driver/core/ScyllaSniProxyTest.java

@@ -10,10 +10,12 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
+import com.datastax.driver.core.utils.ScyllaOnly;
 import java.util.Collection;
 import org.testng.annotations.Test;
 
 @CreateCCM(CreateCCM.TestMode.PER_METHOD)
+@ScyllaOnly
 public class ScyllaSniProxyTest extends CCMTestsSupport {
 
   private void test_ccm_cluster(int testNodes) {

driver-core/src/test/java/com/datastax/driver/core/TestListener.java

@@ -23,6 +23,7 @@
 
 import com.datastax.driver.core.utils.CassandraVersion;
 import com.datastax.driver.core.utils.DseVersion;
+import com.datastax.driver.core.utils.ScyllaOnly;
 import com.datastax.driver.core.utils.ScyllaSkip;
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Method;
@@ -129,6 +130,10 @@ private boolean scanAnnotatedElement(AnnotatedElement element) {
       scyllaSkipCheck();
       foundAnnotation = true;
     }
+    if (element.isAnnotationPresent(ScyllaOnly.class)) {
+      scyllaOnlyCheck();
+      foundAnnotation = true;
+    }
     if (element.isAnnotationPresent(CassandraVersion.class)) {
       CassandraVersion cassandraVersion = element.getAnnotation(CassandraVersion.class);
       cassandraVersionCheck(cassandraVersion);
@@ -173,6 +178,12 @@ private static void scyllaSkipCheck() {
     }
   }
 
+  private static void scyllaOnlyCheck() {
+    if (CCMBridge.getGlobalScyllaVersion() == null) {
+      throw new SkipException("Skipping test because it is enabled only for Scylla cluster.");
+    }
+  }
+
   private static void versionCheck(
       VersionNumber current, VersionNumber required, String skipString) {
     if (current == null) {

driver-core/src/test/java/com/datastax/driver/core/utils/ScyllaOnly.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2022 ScyllaDB
+ *
+ * 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 com.datastax.driver.core.utils;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Annotation for a Class or Method that skips a test when NOT testing with Scylla.
+ *
+ * @see com.datastax.driver.core.TestListener#beforeInvocation(org.testng.IInvokedMethod,
+ *     org.testng.ITestResult)
+ */
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ScyllaOnly {
+  /** @return The description returned if the Scylla requirement is not met. */
+  String description() default "Marked skip when not testing with Scylla.";
+}