--- /dev/null
+package org.apache.lucene.search;
+
+/**
+ * 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.
+ */
+
+import java.io.IOException;
+
+import junit.framework.Assert;
+
+import org.apache.lucene.index.IndexReader;
+
+/**
+ * A unit test helper class to help with RemoteCachingWrapperFilter testing and
+ * assert that it is working correctly.
+ */
+public class RemoteCachingWrapperFilterHelper extends RemoteCachingWrapperFilter {
+
+ private boolean shouldHaveCache;
+
+ public RemoteCachingWrapperFilterHelper(Filter filter, boolean shouldHaveCache) {
+ super(filter);
+ this.shouldHaveCache = shouldHaveCache;
+ }
+
+ public void shouldHaveCache(boolean shouldHaveCache) {
+ this.shouldHaveCache = shouldHaveCache;
+ }
+
+ @Override
+ public DocIdSet getDocIdSet(IndexReader reader) throws IOException {
+ Filter cachedFilter = FilterManager.getInstance().getFilter(filter);
+
+ Assert.assertNotNull("Filter should not be null", cachedFilter);
+ if (!shouldHaveCache) {
+ Assert.assertSame("First time filter should be the same ", filter, cachedFilter);
+ } else {
+ Assert.assertNotSame("We should have a cached version of the filter", filter, cachedFilter);
+ }
+
+ if (filter instanceof CachingWrapperFilterHelper) {
+ ((CachingWrapperFilterHelper)cachedFilter).setShouldHaveCache(shouldHaveCache);
+ }
+ return cachedFilter.getDocIdSet(reader);
+ }
+}