1 /* 2 * Copyright (C) 2008 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.testing; 18 19 import com.google.common.annotations.GwtCompatible; 20 21 import junit.framework.TestCase; 22 23 import java.util.EnumSet; 24 import java.util.concurrent.TimeUnit; 25 26 /** 27 * Unit test for {@link FakeTicker}. 28 * 29 * @author Jige Yu 30 */ 31 @GwtCompatible(emulated = true) 32 public class FakeTickerTest extends TestCase { 33 34 public void testAdvance() { 35 FakeTicker ticker = new FakeTicker(); 36 assertEquals(0, ticker.read()); 37 assertSame(ticker, ticker.advance(10)); 38 assertEquals(10, ticker.read()); 39 ticker.advance(1, TimeUnit.MILLISECONDS); 40 assertEquals(1000010L, ticker.read()); 41 } 42 43 public void testAutoIncrementStep_returnsSameInstance() { 44 FakeTicker ticker = new FakeTicker(); 45 assertSame(ticker, ticker.setAutoIncrementStep(10, TimeUnit.NANOSECONDS)); 46 } 47 48 public void testAutoIncrementStep_nanos() { 49 FakeTicker ticker = new FakeTicker().setAutoIncrementStep(10, TimeUnit.NANOSECONDS); 50 assertEquals(0, ticker.read()); 51 assertEquals(10, ticker.read()); 52 assertEquals(20, ticker.read()); 53 } 54 55 public void testAutoIncrementStep_millis() { 56 FakeTicker ticker = new FakeTicker().setAutoIncrementStep(1, TimeUnit.MILLISECONDS); 57 assertEquals(0, ticker.read()); 58 assertEquals(1000000, ticker.read()); 59 assertEquals(2000000, ticker.read()); 60 } 61 62 public void testAutoIncrementStep_seconds() { 63 FakeTicker ticker = new FakeTicker().setAutoIncrementStep(3, TimeUnit.SECONDS); 64 assertEquals(0, ticker.read()); 65 assertEquals(3000000000L, ticker.read()); 66 assertEquals(6000000000L, ticker.read()); 67 } 68 69 public void testAutoIncrementStep_resetToZero() { 70 FakeTicker ticker = new FakeTicker().setAutoIncrementStep(10, TimeUnit.NANOSECONDS); 71 assertEquals(0, ticker.read()); 72 assertEquals(10, ticker.read()); 73 assertEquals(20, ticker.read()); 74 75 for (TimeUnit timeUnit : EnumSet.allOf(TimeUnit.class)) { 76 ticker.setAutoIncrementStep(0, timeUnit); 77 assertEquals( 78 "Expected no auto-increment when setting autoIncrementStep to 0 " + timeUnit, 79 30, ticker.read()); 80 } 81 } 82 83 public void testAutoIncrement_negative() { 84 FakeTicker ticker = new FakeTicker(); 85 try { 86 ticker.setAutoIncrementStep(-1, TimeUnit.NANOSECONDS); 87 fail("Expected IllegalArgumentException"); 88 } catch (IllegalArgumentException expected) { 89 } 90 } 91 } 92 93
