/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.config.spring.parsers.processors;

import org.mule.tck.junit4.AbstractMuleTestCase;
import org.mule.runtime.config.spring.parsers.PreProcessor;
import org.mule.runtime.core.util.ArrayUtils;

import java.util.StringTokenizer;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

public abstract class AbstractPreProcessorTestCase extends AbstractMuleTestCase {

  protected void assertBad(String[][] constraint, String attributes, String text) throws ParserConfigurationException {
    try {
      assertOk(constraint, attributes);
      fail("Expected failure with " + attributes + " and " + ArrayUtils.toString(constraint));
    } catch (Exception e) {
      assertTrue(e.getMessage(), e.getMessage().indexOf(text) > -1);
    }
  }

  protected void assertOk(String[][] constraint, String attributes) throws ParserConfigurationException {
    createCheck(constraint, null, null).preProcess(null, createElement(attributes));
  }

  protected void assertOk(String[][] constraint, String attributes, String elementName, String namespaceUri)
      throws ParserConfigurationException {
    createCheck(constraint, elementName, namespaceUri).preProcess(null, createElement(attributes, elementName, namespaceUri));
  }

  protected abstract PreProcessor createCheck(String[][] constraint, String elementName, String namespaceUri);

  protected Element createElement(String attributes) throws ParserConfigurationException {
    return createElement(attributes, null, null);
  }

  protected Element createElement(String attributes, String child, String namespaceUri) throws ParserConfigurationException {
    DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = builder.newDocument();
    Element element = document.createElementNS(namespaceUri, "element");
    StringTokenizer tokens = new StringTokenizer(attributes);
    while (tokens.hasMoreTokens()) {
      element.setAttribute(tokens.nextToken(), "value");
    }
    if (child != null) {
      element.appendChild(document.createElementNS(namespaceUri, child));
    }
    return element;
  }

}