/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.math.util;

import java.math.BigDecimal;

import org.apache.commons.math.MathException;
import junit.framework.TestCase;

/**
 * @version $Revision$ $Date$
 */
public class DefaultTransformerTest extends TestCase {
	/**
	 * 
	 */
	public void testTransformDouble() throws Exception {
		double expected = 1.0;
		Double input = Double.valueOf(expected);
		DefaultTransformer t = new DefaultTransformer();
		assertEquals(expected, t.transform(input), 1.0e-4);
	}

	/**
	 * 
	 */
	public void testTransformNull() {
		DefaultTransformer t = new DefaultTransformer();
		try {
			t.transform(null);
			fail("Expection MathException");
		} catch (MathException e) {
			// expected
		}
	}

	/**
	 * 
	 */
	public void testTransformInteger() throws Exception {
		double expected = 1.0;
		Integer input = Integer.valueOf(1);
		DefaultTransformer t = new DefaultTransformer();
		assertEquals(expected, t.transform(input), 1.0e-4);
	}

	/**
	 * 
	 */
	public void testTransformBigDecimal() throws Exception {
		double expected = 1.0;
		BigDecimal input = new BigDecimal("1.0");
		DefaultTransformer t = new DefaultTransformer();
		assertEquals(expected, t.transform(input), 1.0e-4);
	}

	/**
	 * 
	 */
	public void testTransformString() throws Exception {
		double expected = 1.0;
		String input = "1.0";
		DefaultTransformer t = new DefaultTransformer();
		assertEquals(expected, t.transform(input), 1.0e-4);
	}

	/**
	 * 
	 */
	public void testTransformObject() {
		Boolean input = Boolean.TRUE;
		DefaultTransformer t = new DefaultTransformer();
		try {
			t.transform(input);
			fail("Expecting MathException");
		} catch (MathException e) {
			// expected
		}
	}
}
