/*
 * Copyright 2010 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.jstestdriver;

import java.io.CharArrayWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.List;

/**
 * Represents all errors that occurred during a test run.
 * 
 * @author corbinrsmith@gmail.com (Cory Smith)
 */
public class TestErrors extends RuntimeException {

  private static final long serialVersionUID = -5989784108847149994L;
  private final List<Throwable> causes;
  private final String message;

  public TestErrors(String message, List<Throwable> causes) {
    super(message);
    this.message = message;
    this.causes = causes;
  }

  @Override
  public void printStackTrace(PrintStream s) {
    synchronized (s) {
      s.println(this);
      StackTraceElement[] trace = getStackTrace();
      for (int i = 0; i < trace.length; i++) {
        s.println("\tat " + trace[i]);
      }

      s.println("Caused by:");
      for (Throwable cause : causes) {
        s.println(cause.toString());
      }
    }
  }

  @Override
  public void printStackTrace(PrintWriter s) {
    synchronized (s) {
      s.println(this);
      StackTraceElement[] trace = getStackTrace();
      for (int i = 0; i < trace.length; i++) {
        s.println("\tat " + trace[i]);
      }

      for (Throwable cause : causes) {
        s.println();
        s.println("Caused by:" + cause.toString());
        cause.printStackTrace(s);
      }
    }
  }

  @Override
  public String toString() {
    final CharArrayWriter core = new CharArrayWriter();
    final PrintWriter writer = new PrintWriter(core);
    writer.println(message);
    writer.println("Caused by:");
    for (Throwable cause : causes) {
      cause.printStackTrace(writer);
    }
    writer.flush();
    return core.toString();
  }

  public List<Throwable> getCauses() {
    return causes;
  }
}