[FLINK-38460] Refactor SinkUpsertMaterializer tests

Author: rkhachatryan

flink-table/flink-table-runtime/src/test/java/org/apache/flink/table/runtime/operators/sink/SinkUpsertMaterializerStateBackend.java

@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.flink.table.runtime.operators.sink;
+
+import org.apache.flink.contrib.streaming.state.EmbeddedRocksDBStateBackend;
+import org.apache.flink.runtime.state.StateBackend;
+import org.apache.flink.runtime.state.hashmap.HashMapStateBackend;
+
+/** StateBackend to test SinkUpsertMaterializer with. */
+public enum SinkUpsertMaterializerStateBackend {
+    HEAP {
+
+        public StateBackend create(boolean incrementalIfSupported) {
+            return new HashMapStateBackend();
+        }
+    },
+    ROCKSDB {
+
+        public StateBackend create(boolean incrementalIfSupported) {
+            return new EmbeddedRocksDBStateBackend(incrementalIfSupported);
+        }
+    };
+
+    public abstract StateBackend create(boolean incrementalIfSupported);
+}