41 lines
1.4 KiB
Java
41 lines
1.4 KiB
Java
/*
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* Copyright (C) 2014 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.google.common.cache;
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import static com.google.common.truth.Truth.assertThat;
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import junit.framework.TestCase;
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/** Unit tests for {@link LongAdder}. */
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public class LongAdderTest extends TestCase {
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/**
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* No-op null-pointer test for {@link LongAdder} to override the {@link PackageSanityTests}
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* version, which checks package-private methods that we don't want to have to annotate as {@code
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* Nullable} because we don't want diffs from jsr166e.
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*/
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public void testNulls() {}
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public void testOverflows() {
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LongAdder longAdder = new LongAdder();
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longAdder.add(Long.MAX_VALUE);
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assertThat(longAdder.sum()).isEqualTo(Long.MAX_VALUE);
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longAdder.add(1);
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// silently overflows; is this a bug?
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// See https://github.com/google/guava/issues/3503
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assertThat(longAdder.sum()).isEqualTo(-9223372036854775808L);
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}
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}
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