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/*
* Copyright (C) 2014 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.cache;
import static com.google.common.truth.Truth.assertThat;
import junit.framework.TestCase;
/** Unit tests for {@link LongAdder}. */
public class LongAdderTest extends TestCase {
/**
* No-op null-pointer test for {@link LongAdder} to override the {@link PackageSanityTests}
* version, which checks package-private methods that we don't want to have to annotate as {@code
* Nullable} because we don't want diffs from jsr166e.
*/
public void testNulls() {}
public void testOverflows() {
LongAdder longAdder = new LongAdder();
longAdder.add(Long.MAX_VALUE);
assertThat(longAdder.sum()).isEqualTo(Long.MAX_VALUE);
longAdder.add(1);
// silently overflows; is this a bug?
// See https://github.com/google/guava/issues/3503
assertThat(longAdder.sum()).isEqualTo(-9223372036854775808L);
}
}
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