/*
 * 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.test.transactions;

import static junit.framework.Assert.*;
import static org.mockito.Matchers.*;
import static org.mockito.Mockito.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.wamblee.test.transactions.ThreadSpecificProxyFactory;

public class ThreadSpecificProxyFactoryTest {

    private static interface Service {
        int execute(int aX) throws Exception;
    }

    private ThreadSpecificProxyFactory<Service> factory;
    private Service proxy;

    @Before
    public void setUp() {
        factory = new ThreadSpecificProxyFactory<Service>(Service.class);
        proxy = factory.getProxy();
    }

    @After
    public void tearDown() {
        // Empty.
    }

    @Test(expected = NullPointerException.class)
    public void testNoSvcDefined() throws Exception {
        proxy.execute(10);
    }

    @Test
    public void testInvokeThroughProxy() throws Exception {
        Service svc = mock(Service.class);
        when(svc.execute(anyInt())).thenReturn(50);
        factory.set(svc);
        assertEquals(50, proxy.execute(10));
        verify(svc).execute(10);
    }

    @Test
    public void testInvokeThroughProxyWithException() throws Exception {
        Service svc = mock(Service.class);
        try {
            when(svc.execute(anyInt())).thenThrow(
                new RuntimeException("exception thrown"));
            factory.set(svc);
            svc.execute(10);
            fail();
        } catch (RuntimeException e) {
            assertEquals("exception thrown", e.getMessage());
        }
    }

    private int returnFromThread;

    @Test
    public void testVerifyThreadSpecificUsingTwoThreads() throws Exception {
        Service svc1 = mock(Service.class);
        final Service svc2 = mock(Service.class);
        when(svc1.execute(anyInt())).thenReturn(10);
        when(svc2.execute(anyInt())).thenReturn(20);

        factory.set(svc1);
        assertEquals(10, svc1.execute(10));
        Thread t = new Thread() {
            public void run() {
                factory.set(svc2);
                try {
                    returnFromThread = proxy.execute(100);
                } catch (Exception e) {
                    returnFromThread = 100000;
                }
            };
        };
        t.start();
        t.join();
        assertEquals(20, returnFromThread);
        assertEquals(10, proxy.execute(100));

    }

    @Test(expected = IllegalArgumentException.class)
    public void testNotAnInterface() {
        ThreadSpecificProxyFactory f = new ThreadSpecificProxyFactory(String.class);
    }
}