/*
 * Copyright 2005-2010 the original author or 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 org.wamblee.persistence;

import static org.mockito.Mockito.*;

import javax.persistence.EntityManager;
import javax.persistence.Id;

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

import static junit.framework.TestCase.*;

public class JpaDetachableTest {

    public class X {
        @Id
        private int id;

    }

    private EntityManager em;

    @Before
    public void setUp() {
        em = mock(EntityManager.class);
    }

    @Test
    public void testDetachAttach() {
        X x = new X();
        x.id = 100;

        JpaDetachable<X> d = new JpaDetachable<X>(em, x);
        assertNull(d.getReference());
        d.detach();
        assertEquals(100, d.getReference());

        X x2 = new X();
        x2.id = 100;
        when(em.find(X.class, 100)).thenReturn(x2);
        X x3 = d.get();
        assertSame(x2, x3);
        verify(em).find(X.class, 100);

    }
}