1 /* 2 * Copyright (C) 2014 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.cache; 16 17 import static com.google.common.truth.Truth.assertThat; 18 19 import junit.framework.TestCase; 20 21 /** Unit tests for {@link LongAdder}. */ 22 public class LongAdderTest extends TestCase { 23 24 /** 25 * No-op null-pointer test for {@link LongAdder} to override the {@link PackageSanityTests} 26 * version, which checks package-private methods that we don't want to have to annotate as {@code 27 * Nullable} because we don't want diffs from jsr166e. 28 */ testNulls()29 public void testNulls() {} 30 testOverflows()31 public void testOverflows() { 32 LongAdder longAdder = new LongAdder(); 33 longAdder.add(Long.MAX_VALUE); 34 assertThat(longAdder.sum()).isEqualTo(Long.MAX_VALUE); 35 longAdder.add(1); 36 // silently overflows; is this a bug? 37 // See https://github.com/google/guava/issues/3503 38 assertThat(longAdder.sum()).isEqualTo(-9223372036854775808L); 39 } 40 } 41