package org.junit.internal.runners;
   
   import java.lang.reflect.InvocationTargetException;
   import java.lang.reflect.Method;
   import java.lang.reflect.Modifier;
   
   import junit.framework.Test;
   
   /**
   * Runner for use with JUnit 3.8.x-style AllTests classes
   * (those that only implement a static <code>suite()</code>
   * method). For example:
   * <pre>
   * &#064;RunWith(AllTests.class)
   * public class ProductTests {
   *    public static junit.framework.Test suite() {
   *       ...
   *    }
   * }
   * </pre>
   */
  public class SuiteMethod extends JUnit38ClassRunner {
      public SuiteMethod(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;
      }
  }