| /* |
| * Copyright (C) 2008 The Guava Authors |
| * |
| * Licensed 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 com.google.common.base; |
| |
| import static java.util.concurrent.TimeUnit.MICROSECONDS; |
| import static java.util.concurrent.TimeUnit.MILLISECONDS; |
| import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import com.google.common.testing.FakeTicker; |
| import java.time.Duration; |
| import junit.framework.TestCase; |
| |
| /** |
| * Unit test for {@link Stopwatch}. |
| * |
| * @author Kevin Bourrillion |
| */ |
| @GwtCompatible |
| public class StopwatchTest extends TestCase { |
| |
| private final FakeTicker ticker = new FakeTicker(); |
| private final Stopwatch stopwatch = new Stopwatch(ticker); |
| |
| public void testCreateStarted() { |
| Stopwatch startedStopwatch = Stopwatch.createStarted(); |
| assertTrue(startedStopwatch.isRunning()); |
| } |
| |
| public void testCreateUnstarted() { |
| Stopwatch unstartedStopwatch = Stopwatch.createUnstarted(); |
| assertFalse(unstartedStopwatch.isRunning()); |
| assertEquals(0, unstartedStopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testInitialState() { |
| assertFalse(stopwatch.isRunning()); |
| assertEquals(0, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testStart() { |
| assertSame(stopwatch, stopwatch.start()); |
| assertTrue(stopwatch.isRunning()); |
| } |
| |
| public void testStart_whileRunning() { |
| stopwatch.start(); |
| try { |
| stopwatch.start(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| assertTrue(stopwatch.isRunning()); |
| } |
| |
| public void testStop() { |
| stopwatch.start(); |
| assertSame(stopwatch, stopwatch.stop()); |
| assertFalse(stopwatch.isRunning()); |
| } |
| |
| public void testStop_new() { |
| try { |
| stopwatch.stop(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| assertFalse(stopwatch.isRunning()); |
| } |
| |
| public void testStop_alreadyStopped() { |
| stopwatch.start(); |
| stopwatch.stop(); |
| try { |
| stopwatch.stop(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| assertFalse(stopwatch.isRunning()); |
| } |
| |
| public void testReset_new() { |
| ticker.advance(1); |
| stopwatch.reset(); |
| assertFalse(stopwatch.isRunning()); |
| ticker.advance(2); |
| assertEquals(0, stopwatch.elapsed(NANOSECONDS)); |
| stopwatch.start(); |
| ticker.advance(3); |
| assertEquals(3, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testReset_whileRunning() { |
| ticker.advance(1); |
| stopwatch.start(); |
| assertEquals(0, stopwatch.elapsed(NANOSECONDS)); |
| ticker.advance(2); |
| assertEquals(2, stopwatch.elapsed(NANOSECONDS)); |
| stopwatch.reset(); |
| assertFalse(stopwatch.isRunning()); |
| ticker.advance(3); |
| assertEquals(0, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testElapsed_whileRunning() { |
| ticker.advance(78); |
| stopwatch.start(); |
| assertEquals(0, stopwatch.elapsed(NANOSECONDS)); |
| |
| ticker.advance(345); |
| assertEquals(345, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testElapsed_notRunning() { |
| ticker.advance(1); |
| stopwatch.start(); |
| ticker.advance(4); |
| stopwatch.stop(); |
| ticker.advance(9); |
| assertEquals(4, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testElapsed_multipleSegments() { |
| stopwatch.start(); |
| ticker.advance(9); |
| stopwatch.stop(); |
| |
| ticker.advance(16); |
| |
| stopwatch.start(); |
| assertEquals(9, stopwatch.elapsed(NANOSECONDS)); |
| ticker.advance(25); |
| assertEquals(34, stopwatch.elapsed(NANOSECONDS)); |
| |
| stopwatch.stop(); |
| ticker.advance(36); |
| assertEquals(34, stopwatch.elapsed(NANOSECONDS)); |
| } |
| |
| public void testElapsed_micros() { |
| stopwatch.start(); |
| ticker.advance(999); |
| assertEquals(0, stopwatch.elapsed(MICROSECONDS)); |
| ticker.advance(1); |
| assertEquals(1, stopwatch.elapsed(MICROSECONDS)); |
| } |
| |
| public void testElapsed_millis() { |
| stopwatch.start(); |
| ticker.advance(999999); |
| assertEquals(0, stopwatch.elapsed(MILLISECONDS)); |
| ticker.advance(1); |
| assertEquals(1, stopwatch.elapsed(MILLISECONDS)); |
| } |
| |
| @GwtIncompatible |
| public void testElapsed_duration() { |
| stopwatch.start(); |
| ticker.advance(999999); |
| assertEquals(Duration.ofNanos(999999), stopwatch.elapsed()); |
| ticker.advance(1); |
| assertEquals(Duration.ofMillis(1), stopwatch.elapsed()); |
| } |
| |
| public void testToString() { |
| stopwatch.start(); |
| assertEquals("0.000 ns", stopwatch.toString()); |
| ticker.advance(1); |
| assertEquals("1.000 ns", stopwatch.toString()); |
| ticker.advance(998); |
| assertEquals("999.0 ns", stopwatch.toString()); |
| ticker.advance(1); |
| assertEquals("1.000 \u03bcs", stopwatch.toString()); |
| ticker.advance(1); |
| assertEquals("1.001 \u03bcs", stopwatch.toString()); |
| ticker.advance(8998); |
| assertEquals("9.999 \u03bcs", stopwatch.toString()); |
| stopwatch.reset(); |
| stopwatch.start(); |
| ticker.advance(1234567); |
| assertEquals("1.235 ms", stopwatch.toString()); |
| stopwatch.reset(); |
| stopwatch.start(); |
| ticker.advance(5000000000L); |
| assertEquals("5.000 s", stopwatch.toString()); |
| stopwatch.reset(); |
| stopwatch.start(); |
| ticker.advance((long) (1.5 * 60 * 1000000000L)); |
| assertEquals("1.500 min", stopwatch.toString()); |
| stopwatch.reset(); |
| stopwatch.start(); |
| ticker.advance((long) (2.5 * 60 * 60 * 1000000000L)); |
| assertEquals("2.500 h", stopwatch.toString()); |
| stopwatch.reset(); |
| stopwatch.start(); |
| ticker.advance((long) (7.25 * 24 * 60 * 60 * 1000000000L)); |
| assertEquals("7.250 d", stopwatch.toString()); |
| } |
| } |