--- /dev/null
+package org.apache.lucene.document;
+
+/**
+ * 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.
+ */
+
+import org.apache.lucene.util.LuceneTestCase;
+
+public class TestNumberTools extends LuceneTestCase {
+ public void testNearZero() {
+ for (int i = -100; i <= 100; i++) {
+ for (int j = -100; j <= 100; j++) {
+ subtestTwoLongs(i, j);
+ }
+ }
+ }
+
+ public void testMax() {
+ // make sure the constants convert to their equivalents
+ assertEquals(Long.MAX_VALUE, NumberTools
+ .stringToLong(NumberTools.MAX_STRING_VALUE));
+ assertEquals(NumberTools.MAX_STRING_VALUE, NumberTools
+ .longToString(Long.MAX_VALUE));
+
+ // test near MAX, too
+ for (long l = Long.MAX_VALUE; l > Long.MAX_VALUE - 10000; l--) {
+ subtestTwoLongs(l, l - 1);
+ }
+ }
+
+ public void testMin() {
+ // make sure the constants convert to their equivelents
+ assertEquals(Long.MIN_VALUE, NumberTools
+ .stringToLong(NumberTools.MIN_STRING_VALUE));
+ assertEquals(NumberTools.MIN_STRING_VALUE, NumberTools
+ .longToString(Long.MIN_VALUE));
+
+ // test near MIN, too
+ for (long l = Long.MIN_VALUE; l < Long.MIN_VALUE + 10000; l++) {
+ subtestTwoLongs(l, l + 1);
+ }
+ }
+
+ private static void subtestTwoLongs(long i, long j) {
+ // convert to strings
+ String a = NumberTools.longToString(i);
+ String b = NumberTools.longToString(j);
+
+ // are they the right length?
+ assertEquals(NumberTools.STR_SIZE, a.length());
+ assertEquals(NumberTools.STR_SIZE, b.length());
+
+ // are they the right order?
+ if (i < j) {
+ assertTrue(a.compareTo(b) < 0);
+ } else if (i > j) {
+ assertTrue(a.compareTo(b) > 0);
+ } else {
+ assertEquals(a, b);
+ }
+
+ // can we convert them back to longs?
+ long i2 = NumberTools.stringToLong(a);
+ long j2 = NumberTools.stringToLong(b);
+
+ assertEquals(i, i2);
+ assertEquals(j, j2);
+ }
+}
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