/*
 * Copyright 2005-2011 the original author or authors.
 *
 * 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 org.springframework.ws.test.support;

import javax.xml.transform.Source;

/**
 * JUnit independent assertion class.
 *
 * @author Lukas Krecan
 * @author Arjen Poutsma
 * @since 2.0
 */
public abstract class AssertionErrors {

	private AssertionErrors() {
	}

	/**
	 * Fails a test with the given message.
	 *
	 * @param message the message
	 */
	public static void fail(String message) {
		throw new AssertionError(message);
	}

	/**
	 * Fails a test with the given message and source.
	 *
	 * @param message the message
	 * @param source  the source
	 */
	public static void fail(String message, String sourceLabel, Source source) {
		if (source != null) {
			throw new SourceAssertionError(message, sourceLabel, source);
		}
		else {
			fail(message);
		}
	}

	/**
	 * Asserts that a condition is {@code true}. If not, throws an {@link AssertionError} with the given message.
	 *
	 * @param message	the message
	 * @param condition the condition to test for
	 */
	public static void assertTrue(String message, boolean condition) {
		assertTrue(message, condition, null, null);
	}

	/**
	 * Asserts that a condition is {@code true}. If not, throws an {@link AssertionError} with the given message and
	 * source.
	 *
	 * @param message	the message
	 * @param condition the condition to test for
	 */
	public static void assertTrue(String message, boolean condition, String sourceLabel, Source source) {
		if (!condition) {
			fail(message, sourceLabel, source);
		}
	}

	/**
	 * Asserts that two objects are equal. If not, an {@link AssertionError} is thrown with the given message.
	 *
	 * @param message  the message
	 * @param expected the expected value
	 * @param actual   the actual value
	 */
	public static void assertEquals(String message, Object expected, Object actual) {
		assertEquals(message, expected, actual, null, null);
	}

	/**
	 * Asserts that two objects are equal. If not, an {@link AssertionError} is thrown with the given message.
	 *
	 * @param message  the message
	 * @param expected the expected value
	 * @param actual   the actual value
	 * @param source   the source
	 */
	public static void assertEquals(String message, Object expected, Object actual, String sourceLabel, Source source) {
		if (expected == null && actual == null) {
			return;
		}
		if (expected != null && expected.equals(actual)) {
			return;
		}
		fail(message + " expected:<" + expected + "> but was:<" + actual + ">", sourceLabel, source);
	}

}