| /** |
| * 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.apex.malhar.lib.state.spillable; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import com.datatorrent.lib.util.TestUtils; |
| |
| public class SequentialSpillableIdentifierGeneratorTest |
| { |
| @Test |
| public void dontAllowRegistrationAfterNextCallTest() |
| { |
| SequentialSpillableIdentifierGenerator gen = new SequentialSpillableIdentifierGenerator(); |
| |
| gen.next(); |
| |
| boolean exception = false; |
| |
| try { |
| gen.register(TestUtils.getByte(1)); |
| } catch (Exception e) { |
| exception = true; |
| } |
| |
| Assert.assertTrue(exception); |
| } |
| |
| @Test |
| public void simpleSequentialIdGenerationTest() |
| { |
| SequentialSpillableIdentifierGenerator gen = new SequentialSpillableIdentifierGenerator(); |
| |
| for (int index = 0; index < (((int)Byte.MAX_VALUE) + 1); index++) { |
| byte[] id = gen.next(); |
| |
| checkId(index, id); |
| } |
| |
| boolean threwException = false; |
| |
| try { |
| gen.next(); |
| } catch (Exception e) { |
| threwException = true; |
| } |
| |
| Assert.assertTrue(threwException); |
| } |
| |
| @Test |
| public void registerFirst() |
| { |
| SequentialSpillableIdentifierGenerator gen = new SequentialSpillableIdentifierGenerator(); |
| gen.register(TestUtils.getByte(0)); |
| |
| byte[] id = gen.next(); |
| |
| Assert.assertArrayEquals(TestUtils.getByte(1), id); |
| } |
| |
| @Test |
| public void registerLast() |
| { |
| SequentialSpillableIdentifierGenerator gen = new SequentialSpillableIdentifierGenerator(); |
| gen.register(TestUtils.getByte(Byte.MAX_VALUE)); |
| |
| for (int index = 0; index <= (((int)Byte.MAX_VALUE) - 1); index++) { |
| byte[] id = gen.next(); |
| |
| checkId(index, id); |
| } |
| |
| boolean threwException = false; |
| |
| try { |
| gen.next(); |
| } catch (Exception e) { |
| threwException = true; |
| } |
| |
| Assert.assertTrue(threwException); |
| } |
| |
| @Test |
| public void intermingledRegistered() |
| { |
| SequentialSpillableIdentifierGenerator gen = new SequentialSpillableIdentifierGenerator(); |
| |
| gen.register(TestUtils.getByte(1)); |
| gen.register(TestUtils.getByte(2)); |
| gen.register(TestUtils.getByte(5)); |
| gen.register(TestUtils.getByte(7)); |
| |
| checkId(0, gen.next()); |
| checkId(3, gen.next()); |
| checkId(4, gen.next()); |
| checkId(6, gen.next()); |
| checkId(8, gen.next()); |
| checkId(9, gen.next()); |
| } |
| |
| private void checkId(int val, byte[] id) |
| { |
| Assert.assertEquals(1, id.length); |
| Assert.assertEquals(val, id[0]); |
| } |
| } |