--- /dev/null
+package org.apache.lucene.util;
+
+import java.util.Arrays;
+
+/**
+ * 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.
+ */
+
+public class TestCharsRef extends LuceneTestCase {
+ public void testUTF16InUTF8Order() {
+ final int numStrings = atLeast(1000);
+ BytesRef utf8[] = new BytesRef[numStrings];
+ CharsRef utf16[] = new CharsRef[numStrings];
+
+ for (int i = 0; i < numStrings; i++) {
+ String s = _TestUtil.randomUnicodeString(random);
+ utf8[i] = new BytesRef(s);
+ utf16[i] = new CharsRef(s);
+ }
+
+ Arrays.sort(utf8);
+ Arrays.sort(utf16, CharsRef.getUTF16SortedAsUTF8Comparator());
+
+ for (int i = 0; i < numStrings; i++) {
+ assertEquals(utf8[i].utf8ToString(), utf16[i].toString());
+ }
+ }
+
+ public void testAppend() {
+ CharsRef ref = new CharsRef();
+ StringBuilder builder = new StringBuilder();
+ int numStrings = atLeast(10);
+ for (int i = 0; i < numStrings; i++) {
+ char[] charArray = _TestUtil.randomRealisticUnicodeString(random, 1, 100).toCharArray();
+ int offset = random.nextInt(charArray.length);
+ int length = charArray.length - offset;
+ builder.append(charArray, offset, length);
+ ref.append(charArray, offset, length);
+ }
+
+ assertEquals(builder.toString(), ref.toString());
+ }
+
+ public void testCopy() {
+ int numIters = atLeast(10);
+ for (int i = 0; i < numIters; i++) {
+ CharsRef ref = new CharsRef();
+ char[] charArray = _TestUtil.randomRealisticUnicodeString(random, 1, 100).toCharArray();
+ int offset = random.nextInt(charArray.length);
+ int length = charArray.length - offset;
+ String str = new String(charArray, offset, length);
+ ref.copy(charArray, offset, length);
+ assertEquals(str, ref.toString());
+ }
+
+ }
+}