/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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 org.apache.groovy.util.concurrent

import org.junit.jupiter.api.Test

import static groovy.test.GroovyAssert.assertScript

class ManagedIdentityConcurrentMapTest {
    @Test
    void testRemovingEntriesFromMapAfterGC() {
        assertScript '''
            import org.apache.groovy.util.concurrent.ManagedIdentityConcurrentMap

            def m = new ManagedIdentityConcurrentMap<Object, String>()
            def k1 = new Object()
            m.put(k1, "a")
            def k2 = new Object()
            m.put(k2, "b")
            def k3 = new Object()
            m.put(k3, "c")

            assert 3 == m.size()

            // the related entries should be removed after GC happens
            k1 = null
            k2 = null
            k3 = null

            // finalize via GC, which is hard to predicate though it will happen at last
            for (int i = 0; i < 20; i++) {
                System.gc()

                if (m.values().size() == 0) {
                    break
                }

                Thread.sleep(100)
            }

            def k4 = new Object()
            assert "d" == m.getOrPut(k4, "d")
            assert "d" == m.getOrPut(k4, "e")
            assert [k4] == (m.keySet() as List)
            assert ["d"] == (m.values() as List)
        '''
    }
}
