| /* |
| * 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.samza.metrics; |
| |
| import java.util.Arrays; |
| import org.apache.samza.util.Clock; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.*; |
| |
| public class TestTimer { |
| |
| /* |
| * Mock clock |
| */ |
| private final Clock clock = new Clock() { |
| long value = 0; |
| |
| @Override |
| public long currentTimeMillis() { |
| return value += 100; |
| } |
| }; |
| |
| @Test |
| public void testDefaultTimerUpdateAndGetSnapshot() { |
| Timer timer = new Timer("test", 300, clock); |
| timer.update(1L); |
| timer.update(2L); |
| |
| Snapshot snapshot = timer.getSnapshot(); |
| assertTrue(snapshot.getValues().containsAll(Arrays.asList(1L, 2L))); |
| assertEquals(2, snapshot.getValues().size()); |
| } |
| |
| @Test |
| public void testTimerWithDifferentWindowSize() { |
| Timer timer = new Timer("test", 300, clock); |
| timer.update(1L); |
| timer.update(2L); |
| timer.update(3L); |
| |
| Snapshot snapshot = timer.getSnapshot(); |
| assertTrue(snapshot.getValues().containsAll(Arrays.asList(1L, 2L, 3L))); |
| assertEquals(3, snapshot.getValues().size()); |
| |
| // The time is 500 for update(4L) because getSnapshot calls clock once + 3 |
| // updates that call clock 3 times |
| timer.update(4L); |
| Snapshot snapshot2 = timer.getSnapshot(); |
| assertTrue(snapshot2.getValues().containsAll(Arrays.asList(3L, 4L))); |
| assertEquals(2, snapshot2.getValues().size()); |
| } |
| } |