package junit.framework;
   
   import java.io.PrintWriter;
   import java.io.StringWriter;
   
   
   /**
    * A {@code TestFailure} collects a failed test together with
    * the caught exception.
   *
   * @see TestResult
   */
  public class TestFailure {
      protected Test fFailedTest;
      protected Throwable fThrownException;
  
      /**
       * Constructs a TestFailure with the given test and exception.
       */
      public TestFailure(Test failedTest, Throwable thrownException) {
          fFailedTest = failedTest;
          fThrownException = thrownException;
      }
  
      /**
       * Gets the failed test.
       */
      public Test failedTest() {
          return fFailedTest;
      }
  
      /**
       * Gets the thrown exception.
       */
      public Throwable thrownException() {
          return fThrownException;
      }
  
      /**
       * Returns a short description of the failure.
       */
      @Override
      public String toString() {
          return fFailedTest + ": " + fThrownException.getMessage();
      }
      
      /**
       * Returns a String containing the stack trace of the error
       * thrown by TestFailure.
       */
      public String trace() {
          StringWriter stringWriter = new StringWriter();
          PrintWriter writer = new PrintWriter(stringWriter);
          thrownException().printStackTrace(writer);
          return stringWriter.toString();
      }
  
      /**
       * Returns a String containing the message from the thrown exception.
       */
      public String exceptionMessage() {
          return thrownException().getMessage();
      }
  
      /**
       * Returns {@code true} if the error is considered a failure
       * (i.e. if it is an instance of {@code AssertionFailedError}),
       * {@code false} otherwise.
       */
      public boolean isFailure() {
          return thrownException() instanceof AssertionFailedError;
      }
  }