/*
 * ============LICENSE_START=======================================================
 * Common Utils
 * ================================================================================
 * Copyright (C) 2018 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.common.utils.jpa;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;

import javax.persistence.EntityManagerFactory;

import org.junit.Before;
import org.junit.Test;

public class EntityMgrFactoryCloserTest {

    private EntityManagerFactory factory;


    @Before
    public void setUp() throws Exception {
        factory = mock(EntityManagerFactory.class);
    }


    /**
     * Verifies that the constructor does not do anything extra before being closed.
     */
    @Test
    public void testEntityMgrFactoryCloser() {
        EntityMgrFactoryCloser entityMgrFactoryCloser = new EntityMgrFactoryCloser(factory);

        assertEquals(factory, entityMgrFactoryCloser.getFactory());

        // verify not closed yet
        verify(factory, never()).close();

        entityMgrFactoryCloser.close();

        verify(factory).close();
    }

    @Test
    public void testgetFactory() {
        try (EntityMgrFactoryCloser c = new EntityMgrFactoryCloser(factory)) {
            assertEquals(factory, c.getFactory());
        }
    }

    /**
     * Verifies that the manager gets closed when close() is invoked.
     */
    @Test
    public void testClose() {
        EntityMgrFactoryCloser entityMgrFactoryCloser = new EntityMgrFactoryCloser(factory);

        entityMgrFactoryCloser.close();

        // should be closed
        verify(factory).close();
    }

    /**
     * Ensures that the manager gets closed when "try" block exits normally.
     */
    @Test
    public void testClose_TryWithoutExcept() {
        try (EntityMgrFactoryCloser entityMgrFactoryCloser = new EntityMgrFactoryCloser(factory)) {
            // No need to do anything in the try block
        }

        verify(factory).close();
    }

    /**
     * Ensures that the manager gets closed when "try" block throws an exception.
     */
    @Test
    public void testClose_TryWithExcept() {
        try {
            try (EntityMgrFactoryCloser c = new EntityMgrFactoryCloser(factory)) {
                throw new Exception("expected exception");
            }

        } catch (Exception exception) {
            // Ignore the exception
        }

        verify(factory).close();
    }

}