/**

 * Alt2XML

 * Copyright © 2014 František Kučera (frantovo.cz)

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

package cz.frantovo.alt2xml.out.xpath;

import cz.frantovo.alt2xml.out.ActionContext;

import java.io.ByteArrayOutputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.Properties;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.dom.DOMResult;

import static org.testng.Assert.*;

import org.testng.annotations.BeforeMethod;

import org.testng.annotations.Test;

/**

 *

 * @author Ing. František Kučera (frantovo.cz)

 */

public class XPathActionNGTest {

	private final DocumentBuilderFactory documentBuilderFactory;

	private final DocumentBuilder documentBuilder;

	private Properties actionProperties;

	private List<String> actionData;

	public XPathActionNGTest() throws ParserConfigurationException {

		documentBuilderFactory = DocumentBuilderFactory.newInstance();

		documentBuilder = documentBuilderFactory.newDocumentBuilder();

	}

	private DOMResult makeEmptyResult() {

		return new DOMResult(documentBuilder.newDocument());

	}

	private static byte[] makeStringResult(String value) {

		return (value + "\n").getBytes();

	}

	@BeforeMethod

	public void setupMethod() {

		actionProperties = new Properties();

		actionData = new ArrayList<>();

		System.out.println("\n--- Output: --------");

	}

	@Test

	public void testRun_simple() throws Exception {

		actionData.add("1+1");

		doTest(makeEmptyResult(), actionData, actionProperties, makeStringResult("2"));

	}

	private void setTyped(Boolean typed) {

		actionProperties.put(XPathAction.PARAMETER_TYPED_PARAMETERS, typed.toString());

	}

	@Test

	public void testRun_simpleParameters() throws Exception {

		setTyped(false);

		actionData.add("1+$a");

		actionData.add("a");

		actionData.add("2");

		doTest(makeEmptyResult(), actionData, actionProperties, makeStringResult("3"));

	}

	@Test

	public void testRun_simpleMoreParameters() throws Exception {

		setTyped(false);

		actionData.add("$a+$b");

		actionData.add("a");

		actionData.add("2");

		actionData.add("b");

		actionData.add("4");

		doTest(makeEmptyResult(), actionData, actionProperties, makeStringResult("6"));

	}

	@Test

	public void testRun_simpleTypedParameters() throws Exception {

		setTyped(true);

		actionData.add("$a+$b");

		actionData.add("a");

		actionData.add("InteGER");

		actionData.add("4");

		actionData.add("b");

		actionData.add("integeR");

		actionData.add("4");

		doTest(makeEmptyResult(), actionData, actionProperties, makeStringResult("8"));

	}

	private void doTest(DOMResult domResult, List<String> actionData, Properties actionProperties, byte[] expectedResult) throws Exception {

		ByteArrayOutputStream baos = new ByteArrayOutputStream();

		ActionContext actionContext = new ActionContext(baos);

		actionContext.setActionProperties(actionProperties);

		actionContext.setActionData(actionData);

		XPathAction instance = new XPathAction(actionContext);

		instance.run(domResult);

		System.out.write(baos.toByteArray());

		assertEquals(baos.toByteArray(), expectedResult);

	}

}