package beanface.el.functor.testing.tests;

import java.util.Arrays;
import java.util.List;
import java.util.Vector;

import javax.el.ELContext;

import junit.framework.JUnit4TestAdapter;

import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.JUnitCore;

import beanface.el.functor.FunctorELResolver;
import beanface.el.functor.testing.ELContextFactory;

public class ListTests
{
    static private ELContextFactory elcFactory;
    private ELContext elContext;
    private List<String> items;

    @BeforeClass
    public static void setupOnce()
    {
        elcFactory = new ELContextFactory();
        elcFactory.addELResolver(new FunctorELResolver());
    }

    @Before
    public void setup()
    {
        elContext = elcFactory.getELContext();
        items = new Vector<String>(Arrays.asList(new String[]
        {
            "Apple", "Banana", "Orange", "Pear"
        }));
    }

    private Object testResolve(Object base, Object... properties)
    {
        Object result = base;
        for (Object prop : properties)
        {
            result = elContext.getELResolver().getValue(elContext, result, prop);
            Assert.assertNotNull("Expect result of applying property '" + prop
                + "' to base is not null", result);
        }
        return result;
    }

    @Test
    public void testListItem()
    {
        int index = 0;
        Object r = testResolve(items, index);
        Assert.assertNotNull("Resolve result", r);
        Assert.assertEquals("Expect a String to be returned", r.getClass(), String.class);
        Assert.assertEquals("Expected returned value", items.get(index), r);
    }

    @Test
    public void testListClass()
    {
        Object r = testResolve(items, "class");
        Assert.assertNotNull("Resolve result", r);
        Assert.assertEquals("Expect a class to be returned", r.getClass(), Class.class);
        Class rClass = (Class) r;
        Assert.assertEquals("Expected returned class", items.getClass(), rClass);
    }

    @Test
    public void testListEmpty()
    {
        Object r = testResolve(items, "empty");
        Assert.assertNotNull("Resolve result", r);
        Assert.assertEquals("Expect a bool to be returned", r.getClass(), Boolean.class);
        Boolean rBool = (Boolean) r;
        Assert.assertEquals("Expected returned value", items.isEmpty(), rBool.booleanValue());
    }

    public static junit.framework.Test suite()
    {
        return new JUnit4TestAdapter(ListTests.class);
    }

    public static void main(String[] args)
    {
        JUnitCore.runClasses(ListTests.class);
    }
}