package org.junit.runners;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import junit.framework.Test;

import org.junit.internal.runners.OldTestClassRunner;

/** Runner for use with JUnit 3.8.x-style AllTests classes

 * (those that only implement a static <code>suite()</code>

 * method). For example:

 * <pre>

 * @RunWith(AllTests.class)

 * public class ProductTests {

 *    public static junit.framework.Test suite() {

 *       ...

 *    }

 * }

 * </pre>

 */

public class AllTests extends OldTestClassRunner {

	@SuppressWarnings("unchecked")

	public AllTests(Class<?> klass) throws Throwable {

		super(testFromSuiteMethod(klass));

	}

	public static Test testFromSuiteMethod(Class<?> klass) throws Throwable {

		Method suiteMethod= null;

		Test suite= null;

		try {

			suiteMethod= klass.getMethod("suite");

			if (! Modifier.isStatic(suiteMethod.getModifiers())) {

				throw new Exception(klass.getName() + ".suite() must be static");

			}

			suite= (Test) suiteMethod.invoke(null); // static method

		} catch (InvocationTargetException e) {

			throw e.getCause();

		}

		return suite;

	}

}