1 /* 2 * Copyright (C) 2011 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.collect; 18 19 import static com.google.common.testing.SerializableTester.reserializeAndAssert; 20 21 import com.google.common.annotations.GwtIncompatible; 22 import java.math.BigInteger; 23 import junit.framework.TestCase; 24 25 /** 26 * Tests for {@link DiscreteDomain}. 27 * 28 * @author Chris Povirk 29 */ 30 @GwtIncompatible // SerializableTester 31 public class DiscreteDomainTest extends TestCase { testSerialization()32 public void testSerialization() { 33 reserializeAndAssert(DiscreteDomain.integers()); 34 reserializeAndAssert(DiscreteDomain.longs()); 35 reserializeAndAssert(DiscreteDomain.bigIntegers()); 36 } 37 testIntegersOffset()38 public void testIntegersOffset() { 39 assertEquals(1, DiscreteDomain.integers().offset(0, 1).intValue()); 40 assertEquals( 41 Integer.MAX_VALUE, 42 DiscreteDomain.integers().offset(Integer.MIN_VALUE, (1L << 32) - 1).intValue()); 43 } 44 testIntegersOffsetExceptions()45 public void testIntegersOffsetExceptions() { 46 try { 47 DiscreteDomain.integers().offset(0, -1); 48 fail(); 49 } catch (IllegalArgumentException expected) { 50 } 51 try { 52 DiscreteDomain.integers().offset(Integer.MAX_VALUE, 1); 53 fail(); 54 } catch (IllegalArgumentException expected) { 55 } 56 } 57 testLongsOffset()58 public void testLongsOffset() { 59 assertEquals(1, DiscreteDomain.longs().offset(0L, 1).longValue()); 60 assertEquals(Long.MAX_VALUE, DiscreteDomain.longs().offset(0L, Long.MAX_VALUE).longValue()); 61 } 62 testLongsOffsetExceptions()63 public void testLongsOffsetExceptions() { 64 try { 65 DiscreteDomain.longs().offset(0L, -1); 66 fail(); 67 } catch (IllegalArgumentException expected) { 68 } 69 try { 70 DiscreteDomain.longs().offset(Long.MAX_VALUE, 1); 71 fail(); 72 } catch (IllegalArgumentException expected) { 73 } 74 } 75 testBigIntegersOffset()76 public void testBigIntegersOffset() { 77 assertEquals(BigInteger.ONE, DiscreteDomain.bigIntegers().offset(BigInteger.ZERO, 1)); 78 assertEquals( 79 BigInteger.valueOf(Long.MAX_VALUE), 80 DiscreteDomain.bigIntegers().offset(BigInteger.ZERO, Long.MAX_VALUE)); 81 } 82 testBigIntegersOffsetExceptions()83 public void testBigIntegersOffsetExceptions() { 84 try { 85 DiscreteDomain.bigIntegers().offset(BigInteger.ZERO, -1); 86 fail(); 87 } catch (IllegalArgumentException expected) { 88 } 89 } 90 testCustomOffsetExceptions()91 public void testCustomOffsetExceptions() { 92 try { 93 new MyIntegerDomain().offset(0, -1); 94 fail(); 95 } catch (IllegalArgumentException expected) { 96 } 97 try { 98 new MyIntegerDomain().offset(Integer.MAX_VALUE, 1); 99 fail(); 100 } catch (IllegalArgumentException expected) { 101 } 102 } 103 104 private static final class MyIntegerDomain extends DiscreteDomain<Integer> { 105 static final DiscreteDomain<Integer> DELEGATE = DiscreteDomain.integers(); 106 107 @Override next(Integer value)108 public Integer next(Integer value) { 109 return DELEGATE.next(value); 110 } 111 112 @Override previous(Integer value)113 public Integer previous(Integer value) { 114 return DELEGATE.previous(value); 115 } 116 117 // Do *not* override offset() to delegate: We want to test the default implementation. 118 119 @Override distance(Integer start, Integer end)120 public long distance(Integer start, Integer end) { 121 return DELEGATE.distance(start, end); 122 } 123 124 @Override minValue()125 public Integer minValue() { 126 return DELEGATE.minValue(); 127 } 128 129 @Override maxValue()130 public Integer maxValue() { 131 return DELEGATE.maxValue(); 132 } 133 } 134 } 135