LUCENE-6989: Disable test if mmap unmapping is not working (otherwise will fail with later Java 9), until we committed real fix for LUCENE-6989; remove useless and broken test

lucene/core/src/test/org/apache/lucene/store/TestMmapDirectory.java

@@ -31,4 +31,11 @@ public class TestMmapDirectory extends BaseDirectoryTestCase {
     m.setPreload(random().nextBoolean());
     return m;
   }
+  
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    assumeTrue("test requires a jre that supports unmapping", MMapDirectory.UNMAP_SUPPORTED);
+  }
+  
 }

lucene/core/src/test/org/apache/lucene/store/TestWindowsMMap.java

@@ -1,91 +0,0 @@
-/*
- * 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.store;
-
-
-import java.nio.file.Path;
-
-import org.apache.lucene.document.Field;
-import org.apache.lucene.util.LuceneTestCase;
-
-import org.apache.lucene.analysis.MockAnalyzer;
-import org.apache.lucene.document.Document;
-import org.apache.lucene.index.DirectoryReader;
-import org.apache.lucene.index.IndexReader;
-import org.apache.lucene.index.IndexWriter;
-import org.apache.lucene.index.IndexWriterConfig;
-import org.apache.lucene.index.IndexWriterConfig.OpenMode;
-import org.apache.lucene.search.IndexSearcher;
-
-public class TestWindowsMMap extends LuceneTestCase {
-  
-  private final static String alphabet = "abcdefghijklmnopqrstuvwzyz";
-  
-  @Override
-  public void setUp() throws Exception {
-    super.setUp();
-  }
-  
-  private String randomToken() {
-    int tl = 1 + random().nextInt(7);
-    StringBuilder sb = new StringBuilder();
-    for(int cx = 0; cx < tl; cx ++) {
-      int c = random().nextInt(25);
-      sb.append(alphabet.substring(c, c+1));
-    }
-    return sb.toString();
-  }
-  
-  private String randomField() {
-    int fl = 1 + random().nextInt(3);
-    StringBuilder fb = new StringBuilder();
-    for(int fx = 0; fx < fl; fx ++) {
-      fb.append(randomToken());
-      fb.append(" ");
-    }
-    return fb.toString();
-  }
-  
-  public void testMmapIndex() throws Exception {
-    // sometimes the directory is not cleaned by rmDir, because on Windows it
-    // may take some time until the files are finally dereferenced. So clean the
-    // directory up front, or otherwise new IndexWriter will fail.
-    Path dirPath = createTempDir("testLuceneMmap");
-    MMapDirectory dir = new MMapDirectory(dirPath);
-    
-    // plan to add a set of useful stopwords, consider changing some of the
-    // interior filters.
-    MockAnalyzer analyzer = new MockAnalyzer(random());
-    // TODO: something about lock timeouts and leftover locks.
-    IndexWriter writer = new IndexWriter(dir, new IndexWriterConfig(analyzer)
-        .setOpenMode(OpenMode.CREATE));
-    writer.commit();
-    IndexReader reader = DirectoryReader.open(dir);
-    IndexSearcher searcher = newSearcher(reader);
-    
-    int num = atLeast(1000);
-    for(int dx = 0; dx < num; dx ++) {
-      String f = randomField();
-      Document doc = new Document();
-      doc.add(newTextField("data", f, Field.Store.YES));  
-      writer.addDocument(doc);
-    }
-    
-    reader.close();
-    writer.close();
-  }
-}