ClassUtilTest.java

/*******************************************************************************
 * Copyright (c) 2010 Markus Alexander Kuppe.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Markus Alexander Kuppe (ecf-dev_eclipse.org <at> lemmster <dot> de) - initial API and implementation
 ******************************************************************************/
package org.eclipse.ecf.tests.sharedobject.util.reflection;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;

import junit.framework.TestCase;

import org.eclipse.ecf.core.util.reflection.ClassUtil;

public class ClassUtilTest extends TestCase {

	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetPrimitiveMethodWithPrimitive() {
		testGetMethod(new Class[] {int.class}, new Class[] {int.class}, new Object[]{new Integer(1)});		
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetPrimitiveMethodWithObject() {
		testGetMethod(new Class[] {Integer.class}, new Class[] {int.class}, new Object[]{new Integer(1)});
	}

	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetObjectMethodWithObject() {
		testGetMethod(new Class[] {Long.class}, new Class[]{Long.class}, new Object[]{new Long(1L)});
	}

	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetObjectMethodWithPrimitive() {
		testGetMethod(new Class[] {long.class}, new Class[]{Long.class}, new Object[]{new Long(1L)});
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetObjectMethodWhenBoth() {
		testGetMethod(new Class[] {Boolean.class}, new Class[]{Boolean.class}, new Object[]{new Boolean(true)});
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetPrimitiveMethodWhenBoth() {
		testGetMethod(new Class[] {boolean.class}, new Class[]{boolean.class}, new Object[]{new Boolean(true)});
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetMethodWithoutParams() {
		testGetMethod(new Class[]{}, new Class[]{}, null);
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetObjectMethodFromSuperclassWithPrimitive() {
		testGetMethod(new Class[]{float.class}, new Class[]{Float.class}, new Object[]{new Float(1.0)});
	}
	
	/**
	 * Test method for {@link org.eclipse.ecf.core.util.reflection.ClassUtil#getMethod(java.lang.Class, java.lang.String, java.lang.Class[])}.
	 */
	public void testGetPrimitiveMethodFromSuperclassWithObject() {
		testGetMethod(new Class[]{Float.class}, new Class[]{Float.class}, new Object[]{new Float(1.0)});
	}
	
	// helper
	private void testGetMethod(Class[] searchParameterTypes, Class[] expectedParameterTypes, Object[] params) {
		Method method = null;
		try {
			method = ClassUtil.getMethod(TestClass.class, "foo", searchParameterTypes);
		} catch (NoSuchMethodException e) {
			fail("failed to match expected the method: " + e.getMessage());
		}
		
		final Class[] someParameterTypes = method.getParameterTypes();
		assertTrue("Parameters don't match", Arrays.equals(expectedParameterTypes, someParameterTypes));
		
		try {
			assertNotNull("executed method from superclass", method.invoke(new TestClass(), params));
		} catch (IllegalArgumentException e) {
			fail(e.getMessage());
		} catch (IllegalAccessException e) {
			fail(e.getMessage());
		} catch (InvocationTargetException e) {
			fail(e.getMessage());
		}
	}

	// helper class 
	class TestClass extends AbstractTestClass {
		public String foo() {return "";}
		public String foo(final int i) {return "";}
		public String foo(final Long i) {return "";}
		public String foo(final boolean b) {return "";}
		public String foo(final Boolean b) {return "";}
	}
	
	abstract class AbstractTestClass {
		public String foo(final Float f) {return "";}
		public String foo() {throw new UnsupportedOperationException();}
		public String foo(final int i) {throw new UnsupportedOperationException();}
		public String foo(final Long i) {throw new UnsupportedOperationException();}
		public String foo(final boolean b) {throw new UnsupportedOperationException();};
		public String foo(final Boolean b) {throw new UnsupportedOperationException();};
	}
}