package com.atlassian.webdriver.rule;
   
   import org.junit.runner.Description;
   import org.junit.runners.JUnit4;
   import org.junit.runners.model.InitializationError;
   
   /**
    * For creating JUnit test descriptions
    *
   * @since 2.1
   */
  public final class Descriptions
  {
  
      private Descriptions()
      {
          throw new AssertionError("Don't instantiate me");
      }
  
      public static Description forSuite(Class<?> clazz)
      {
          try
          {
              return new JUnit4(clazz).getDescription();
          }
          catch (InitializationError initializationError)
          {
              throw new IllegalArgumentException("Provided class is not a valid test class", initializationError);
          }
      }
  
      public static Description forTest(Class<?> clazz, String methodName)
      {
          for (Description test : forSuite(clazz).getChildren())
          {
              if (test.getMethodName().equals(methodName))
              {
                  return test;
              }
          }
          throw new IllegalArgumentException("Class " + clazz.getName() + " does not contain a valid test method " + methodName);
      }
  }