Check in missing test

lucene/core/src/test/org/apache/lucene/codecs/lucene101/TestLucene101PostingsFormatV0.java

@@ -0,0 +1,34 @@
+/*
+ * 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.lucene.codecs.lucene101;
+
+import org.apache.lucene.codecs.Codec;
+import org.apache.lucene.codecs.lucene90.blocktree.Lucene90BlockTreeTermsWriter;
+import org.apache.lucene.tests.index.BasePostingsFormatTestCase;
+import org.apache.lucene.tests.util.TestUtil;
+
+public class TestLucene101PostingsFormatV0 extends BasePostingsFormatTestCase {
+
+  @Override
+  protected Codec getCodec() {
+    return TestUtil.alwaysPostingsFormat(
+        new Lucene101PostingsFormat(
+            Lucene90BlockTreeTermsWriter.DEFAULT_MIN_BLOCK_SIZE,
+            Lucene90BlockTreeTermsWriter.DEFAULT_MAX_BLOCK_SIZE,
+            Lucene101PostingsFormat.VERSION_START));
+  }
+}