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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.util;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.testing.EqualsTester;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link Pair}.
*/
@RunWith(JUnit4.class)
public class PairTest {
@Test
public void constructor() {
Object a = new Object();
Object b = new Object();
Pair<Object, Object> p = Pair.of(a, b);
assertThat(p.first).isSameAs(a);
assertThat(p.second).isSameAs(b);
assertThat(p).isEqualTo(Pair.of(a, b));
assertThat(p.hashCode()).isEqualTo(31 * a.hashCode() + b.hashCode());
}
@Test
public void nullable() {
Pair<Object, Object> p = Pair.of(null, null);
assertThat(p.first).isNull();
assertThat(p.second).isNull();
p.hashCode(); // Should not throw.
new EqualsTester().addEqualityGroup(p).testEquals();
}
}
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