a test for lucene FieldCache

Author: kimchy

modules/elasticsearch/src/test/java/org/elasticsearch/deps/lucene/NumericFieldCacheTests.java

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+/*
+ * Licensed to Elastic Search and Shay Banon under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. Elastic Search 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.elasticsearch.deps.lucene;
+
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.NumericField;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.search.FieldCache;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.store.RAMDirectory;
+import org.elasticsearch.util.lucene.Lucene;
+import org.testng.annotations.Test;
+
+import static org.hamcrest.MatcherAssert.*;
+import static org.hamcrest.Matchers.*;
+
+/**
+ * @author kimchy (shay.banon)
+ */
+@Test
+public class NumericFieldCacheTests {
+
+    /**
+     * A test that verifies that when using FieldCache for a field that has been added twice (under the same name)
+     * to the document, returns the last one.
+     */
+    @Test public void testTwoFieldSameNameNumericFieldCache() throws Exception {
+        Directory dir = new RAMDirectory();
+        IndexWriter indexWriter = new IndexWriter(dir, Lucene.STANDARD_ANALYZER, true, IndexWriter.MaxFieldLength.UNLIMITED);
+
+        Document doc = new Document();
+        NumericField field = new NumericField("int1").setIntValue(1);
+        doc.add(field);
+
+        field = new NumericField("int1").setIntValue(2);
+        doc.add(field);
+
+        indexWriter.addDocument(doc);
+
+        IndexReader reader = indexWriter.getReader();
+        int[] ints = FieldCache.DEFAULT.getInts(reader, "int1");
+        assertThat(ints.length, equalTo(1));
+        assertThat(ints[0], equalTo(2));
+    }
+}