TestPerspectives.java

package com.rits.tests.perspectives;

import java.math.BigDecimal;

import junit.framework.TestCase;

import com.rits.cloning.Cloner;
import com.rits.perspectives.Perspectives;
import com.rits.tests.perspectives.model.OrderedProduct;
import com.rits.tests.perspectives.model.OrderedProducts;
import com.rits.tests.perspectives.model.Product;
import com.rits.tests.perspectives.model.Products;
import com.rits.tests.perspectives.model.RelatedProduct;

/**
 * @author kostantinos.kougios
 *
 * 30 Nov 2009
 */
public class TestPerspectives extends TestCase
{
	private final Cloner		cloner			= new Cloner();
	private final Perspectives	perspectives	= new Perspectives(cloner);

	public void testViewAs()
	{
		// we somehow fetch a product, i.e. from the database
		final Product product = new Product(5, "mouse", "a 3-button mouse");

		// we need to "view" this product as an ordered product.
		final OrderedProduct orderedProduct = perspectives.viewAs(OrderedProduct.class, product);
		orderedProduct.setPrice(new BigDecimal("5.44"));
		orderedProduct.setQty(5);

		// test if all ok
		assertEquals(product.getId(), orderedProduct.getId());
		assertEquals(product.getSku(), orderedProduct.getSku());
		assertEquals(product.getTitle(), orderedProduct.getTitle());
		assertEquals(new BigDecimal("5.44"), orderedProduct.getPrice());
		assertEquals(5, orderedProduct.getQty());
	}

	public void testViewAs2ExtendedSubclasses()
	{
		final Product relatedProduct = new RelatedProduct(8, "X5", "RX5");
		final OrderedProduct op = perspectives.viewAs(OrderedProduct.class, relatedProduct);
		assertEquals(relatedProduct.getId(), op.getId());
		assertEquals(relatedProduct.getSku(), op.getSku());
		assertEquals(relatedProduct.getTitle(), op.getTitle());
	}

	public void testViewAsNull()
	{
		final OrderedProduct op = perspectives.viewAs(OrderedProduct.class, null);
		assertNull(op);
	}

	public void testViewCollectionAs()
	{
		final Product p1 = new Product(1, "mouse1", "a mouse");
		final Product p2 = new Product(2, "mouse2", "an other mouse");
		final Product p3 = new Product(3, "keyboard1", "a keyboard");
		final Products products = new Products(p1, p2, p3);

		// view the products from the orderedproducts perspective
		final OrderedProducts orderedProducts = perspectives.viewCollectionAs(new OrderedProducts(), OrderedProduct.class, products);
		assertEquals(products.size(), orderedProducts.size());
		assertEquals(products.get(0), orderedProducts.get(0));
		assertEquals(products.get(1), orderedProducts.get(1));
		assertEquals(products.get(2), orderedProducts.get(2));
	}

	public void testViewNullCollectionAs()
	{
		final OrderedProducts orderedProducts = perspectives.viewCollectionAs(new OrderedProducts(), OrderedProduct.class, null);
		assertNull(orderedProducts);
	}
}