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package org.apache.lucene.index;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field.Index;
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import org.apache.lucene.document.Field.Store;
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import org.apache.lucene.util.*;
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import org.apache.lucene.store.*;
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import org.junit.Test;
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import java.io.IOException;
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public class TestIsCurrent extends LuceneTestCase {
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private RandomIndexWriter writer;
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private Directory directory;
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public void setUp() throws Exception {
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// initialize directory
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directory = newDirectory();
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writer = new RandomIndexWriter(random, directory);
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Document doc = new Document();
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doc.add(newField("UUID", "1", Store.YES, Index.ANALYZED));
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writer.addDocument(doc);
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public void tearDown() throws Exception {
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* Failing testcase showing the trouble
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public void testDeleteByTermIsCurrent() throws IOException {
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IndexReader reader = writer.getReader();
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// assert index has a document and reader is up2date
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assertEquals("One document should be in the index", 1, writer.numDocs());
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assertTrue("One document added, reader should be current", reader.isCurrent());
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Term idTerm = new Term("UUID", "1");
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writer.deleteDocuments(idTerm);
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// assert document has been deleted (index changed), reader is stale
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assertEquals("Document should be removed", 0, writer.numDocs());
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assertFalse("Reader should be stale", reader.isCurrent());
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* Testcase for example to show that writer.deleteAll() is working as expected
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public void testDeleteAllIsCurrent() throws IOException {
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IndexReader reader = writer.getReader();
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// assert index has a document and reader is up2date
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assertEquals("One document should be in the index", 1, writer.numDocs());
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assertTrue("Document added, reader should be stale ", reader.isCurrent());
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// remove all documents
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// assert document has been deleted (index changed), reader is stale
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assertEquals("Document should be removed", 0, writer.numDocs());
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assertFalse("Reader should be stale", reader.isCurrent());