package org.junit.internal.builders;
   
   import org.junit.internal.runners.SuiteMethod;
   import org.junit.runner.Runner;
   import org.junit.runners.model.RunnerBuilder;
   
   public class SuiteMethodBuilder extends RunnerBuilder {
       @Override
       public Runner runnerForClass(Class<?> each) throws Throwable {
          if (hasSuiteMethod(each)) {
              return new SuiteMethod(each);
          }
          return null;
      }
  
      public boolean hasSuiteMethod(Class<?> testClass) {
          try {
              testClass.getMethod("suite");
          } catch (NoSuchMethodException e) {
              return false;
          }
          return true;
      }
  }