| /** |
| * 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.htrace.impl; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class TestTimeUtil { |
| /** |
| * Test that our deltaMs function can compute the time difference between any |
| * two monotonic times in milliseconds. |
| */ |
| @Test(timeout = 60000) |
| public void testDeltaMs() throws Exception { |
| Assert.assertEquals(0, TimeUtil.deltaMs(0, 0)); |
| Assert.assertEquals(1, TimeUtil.deltaMs(0, 1)); |
| Assert.assertEquals(0, TimeUtil.deltaMs(1, 0)); |
| Assert.assertEquals(10, TimeUtil.deltaMs(1000, 1010)); |
| long minMs = TimeUnit.MILLISECONDS.convert(Long.MIN_VALUE, |
| TimeUnit.NANOSECONDS); |
| long maxMs = TimeUnit.MILLISECONDS.convert(Long.MAX_VALUE, |
| TimeUnit.NANOSECONDS); |
| Assert.assertEquals(10, TimeUtil.deltaMs(minMs, minMs + 10)); |
| Assert.assertEquals(maxMs, TimeUtil.deltaMs(minMs, maxMs)); |
| Assert.assertEquals(11, TimeUtil.deltaMs(maxMs - 10, minMs)); |
| } |
| } |