/**
* 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.camel;
import org.apache.camel.spi.Language;
import org.apache.camel.util.ExchangeHelper;
/**
* A useful base class for testing the language plugins in Camel
* @version $Revision: 707305 $
*/
public abstract class LanguageTestSupport extends ExchangeTestSupport {
protected abstract String getLanguageName();
/**
* Asserts that the given predicate expression evaluated on the current language and message
* exchange evaluates to true
*/
protected void assertPredicate(String expression) {
assertPredicate(exchange, expression, true);
}
/**
* Asserts that the given predicate expression evaluated on the current language and message
* exchange evaluates to false
*/
protected void assertPredicateFails(String expression) {
assertPredicate(exchange, expression, false);
}
/**
* Asserts that the given predicate expression evaluated on the current language and message
* exchange evaluates to the expected value
*/
protected void assertPredicate(String expression, boolean expected) {
assertPredicate(exchange, expression, expected);
}
protected void assertPredicate(Exchange exchange, String expression, boolean expected) {
assertPredicate(getLanguageName(), expression, exchange, expected);
}
/**
* Asserts that this language expression evaluates to the given value on the given exchange
*/
protected void assertExpression(Exchange exchange, String expressionText, Object expectedValue) {
assertExpression(exchange, getLanguageName(), expressionText, expectedValue);
}
/**
* Asserts that this language expression evaluates to the given value on the current exchange
*/
protected void assertExpression(String expressionText, Object expectedValue) {
assertExpression(exchange, expressionText, expectedValue);
}
/**
* Asserts that the expression evaluates to one of the two given values
*/
protected void assertExpression(String expressionText, String expectedValue, String orThisExpectedValue) {
Language language = assertResolveLanguage(getLanguageName());
Expression<Exchange> expression = language.createExpression(expressionText);
assertNotNull("No Expression could be created for text: " + expressionText + " language: " + language, expression);
Object value = expression.evaluate(exchange);
// lets try convert to the type of the expected
if (expectedValue != null) {
value = ExchangeHelper.convertToType(exchange, expectedValue.getClass(), value);
}
log.debug("Evaluated expression: " + expression + " on exchange: " + exchange + " result: " + value);
assertTrue("Expression: " + expression + " on Exchange: " + exchange,
expectedValue.equals(value) || orThisExpectedValue.equals(value));
}
}