add test that ensures that we bumb the version on a Lucene Upgrade

src/test/java/org/elasticsearch/test/unit/common/lucene/LuceneTest.java

@@ -0,0 +1,50 @@
+/*
+ * Licensed to ElasticSearch and Shay Banon under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. ElasticSearch 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.test.unit.common.lucene;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.IsEqual.equalTo;
+
+import org.apache.lucene.util.Version;
+import org.elasticsearch.common.logging.ESLogger;
+import org.elasticsearch.common.logging.ESLoggerFactory;
+import org.elasticsearch.common.lucene.Lucene;
+import org.testng.annotations.Test;
+
+/**
+ * 
+ */
+public class LuceneTest {
+
+
+    /*
+     * simple test that ensures that we bumb the version on Upgrade
+     */
+    @Test
+    public void testVersion() {
+        ESLogger logger = ESLoggerFactory.getLogger(LuceneTest.class.getName());
+        Version[] values = Version.values();
+        assertThat(Version.LUCENE_CURRENT, equalTo(values[values.length-1]));
+        assertThat("Latest Lucene Version is not set after upgrade", Lucene.VERSION, equalTo(values[values.length-2]));
+        assertThat(Lucene.parseVersion(null, Lucene.VERSION, null), equalTo(Lucene.VERSION));
+        for (int i = 0; i < values.length-1; i++) {
+            // this should fail if the lucene version is not mapped as a string in Lucene.java
+            assertThat(Lucene.parseVersion(values[i].name().replaceFirst("^LUCENE_(\\d)(\\d)$", "$1.$2"), Version.LUCENE_CURRENT, logger), equalTo(values[i]));
+        }
+    }
+}