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/*
* Copyright 2023 Code Intelligence GmbH
*
* 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.code_intelligence.jazzer.mutation.support;
import static com.google.common.truth.Truth.assertThat;
import java.util.Arrays;
import java.util.List;
import org.junit.jupiter.api.Test;
class WeakIdentityHashMapTest {
private static void reachabilityFence(Object o) {
// Polyfill for JDK 9+ Reference.reachabilityFence:
// https://mail.openjdk.org/pipermail/core-libs-dev/2018-February/051312.html
}
@Test
void testWeakIdentityHashMap_hasIdentitySemantics() {
WeakIdentityHashMap<List<Integer>, String> map = new WeakIdentityHashMap<>();
List<Integer> list = Arrays.asList(1, 2);
map.put(list, "value");
assertThat(map.containsKey(list)).isTrue();
List<Integer> equalList = Arrays.asList(1, 2);
assertThat(map.containsKey(equalList)).isFalse();
reachabilityFence(list);
}
@Test
void testWeakIdentityHashMap_hasWeakSemantics() {
WeakIdentityHashMap<List<Integer>, String> map = new WeakIdentityHashMap<>();
List<Integer> list = Arrays.asList(1, 2);
map.put(list, "value");
assertThat(map.containsKey(list)).isTrue();
assertThat(map.size()).isEqualTo(1);
assertThat(map.isEmpty()).isFalse();
reachabilityFence(list);
map.collectKeysForTesting();
assertThat(map.size()).isEqualTo(0);
assertThat(map.isEmpty()).isTrue();
}
}
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