| /** |
| * 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. |
| */ |
| package org.apache.hadoop.mapreduce.lib.db; |
| |
| import java.io.IOException; |
| import java.math.BigDecimal; |
| import java.sql.SQLException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import junit.framework.TestCase; |
| |
| public class TestIntegerSplitter extends TestCase { |
| private long [] toLongArray(List<Long> in) { |
| long [] out = new long[in.size()]; |
| for (int i = 0; i < in.size(); i++) { |
| out[i] = in.get(i).longValue(); |
| } |
| |
| return out; |
| } |
| |
| public String formatLongArray(long [] ar) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("["); |
| boolean first = true; |
| for (long val : ar) { |
| if (!first) { |
| sb.append(", "); |
| } |
| |
| sb.append(Long.toString(val)); |
| first = false; |
| } |
| |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| public void assertLongArrayEquals(long [] expected, long [] actual) { |
| for (int i = 0; i < expected.length; i++) { |
| try { |
| assertEquals("Failure at position " + i + "; got " + actual[i] |
| + " instead of " + expected[i] + "; actual array is " + formatLongArray(actual), |
| expected[i], actual[i]); |
| } catch (ArrayIndexOutOfBoundsException oob) { |
| fail("Expected array with " + expected.length + " elements; got " + actual.length |
| + ". Actual array is " + formatLongArray(actual)); |
| } |
| } |
| |
| if (actual.length > expected.length) { |
| fail("Actual array has " + actual.length + " elements; expected " + expected.length |
| + ". ACtual array is " + formatLongArray(actual)); |
| } |
| } |
| |
| public void testEvenSplits() throws SQLException { |
| List<Long> splits = new IntegerSplitter().split(10, 0, 100); |
| long [] expected = { 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 }; |
| assertLongArrayEquals(expected, toLongArray(splits)); |
| } |
| |
| public void testOddSplits() throws SQLException { |
| List<Long> splits = new IntegerSplitter().split(10, 0, 95); |
| long [] expected = { 0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 95 }; |
| assertLongArrayEquals(expected, toLongArray(splits)); |
| |
| } |
| |
| public void testSingletonSplit() throws SQLException { |
| List<Long> splits = new IntegerSplitter().split(1, 5, 5); |
| long [] expected = { 5, 5 }; |
| assertLongArrayEquals(expected, toLongArray(splits)); |
| } |
| |
| public void testSingletonSplit2() throws SQLException { |
| // Same test, but overly-high numSplits |
| List<Long> splits = new IntegerSplitter().split(5, 5, 5); |
| long [] expected = { 5, 5 }; |
| assertLongArrayEquals(expected, toLongArray(splits)); |
| } |
| |
| public void testTooManySplits() throws SQLException { |
| List<Long> splits = new IntegerSplitter().split(5, 3, 5); |
| long [] expected = { 3, 4, 5 }; |
| assertLongArrayEquals(expected, toLongArray(splits)); |
| } |
| |
| } |
| |