/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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/**
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*
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*/
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package org.jbpm.test.assertion;
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import java.lang.reflect.Method;
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import java.util.List;
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import junit.framework.Assert;
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/**
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* Utility class with assertions for query test.
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*
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* @author Joram Barrez
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*/
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public class QueryAssertions {
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// No need to instantiate
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private QueryAssertions() {
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}
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/**
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* Assertion to be used to check if the result of a certain XXXQuery produces
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* the correct result.
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*
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* Example usage:
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*
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* List<Task> taskListAsc = taskService.createTaskQuery().orderAsc(property).list(); List<Task>
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* taskListDesc = taskService.createTaskQuery().orderDesc(property).list();
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* QueryAssertions.assertOrderOnProperty(Task.class, property, taskListAsc, taskListDesc, Arrays.asList("a", "b", "c"));
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*
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* The assertion will do the following assertions:
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*
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* @param clazz
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* Due to generics mumbo-jumbo, it's required to provide the class
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* of the generic type T. If only we could do T.getClass() ...
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* @param <T>
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* The return type of the XXXQuery
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* @param property
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* The property on which the query was ordered
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* @param listOrderedAsc
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* The list resulting from executing the query with an 'order by asc'
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* @param listOrderedDesc
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* The list resulting from executing the query with an 'order by
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* desc'
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* @param expectedValuesAsc
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* The hard coded list of expected elements, in ascending order. The
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* assertion for the descending case will be done by reversing this
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* list
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*/
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public static <T> void assertOrderOnProperty(Class<T> clazz, String property,
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List<T> listOrderedAsc, List<T> listOrderedDesc, List<Object> expectedValuesAsc) {
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Assert.assertNotNull(listOrderedAsc);
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Assert.assertEquals(expectedValuesAsc.size(), expectedValuesAsc.size());
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Assert.assertNotNull(listOrderedDesc);
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Assert.assertEquals(expectedValuesAsc.size(), listOrderedDesc.size());
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for (int i = 0; i < expectedValuesAsc.size(); i++) {
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Object realValueAsc = null;
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Object realValueDesc = null;
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try {
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realValueAsc = invokeGetter(property, clazz, listOrderedAsc.get(i));
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realValueDesc = invokeGetter(property, clazz, listOrderedDesc.get(i));
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} catch (Exception e) {
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Assert.fail(e.getMessage());
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}
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Assert.assertEquals("Incorrect order by ASC for property " + property,
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expectedValuesAsc.get(i), realValueAsc);
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Assert.assertEquals("Incorrect order by DESC for property " + property,
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expectedValuesAsc.get((listOrderedDesc.size() -1) - i), realValueDesc);
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}
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}
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/**
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* Does the same as the assertOrderOnProperty assertion, but instead of
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* checking if the resulting list have the correct elements now it is checked
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* if the elements are naturally ordered ascending and descending.
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*
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* IMPORTANT: the type T must be implementing the {@link Comparable} interface!
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*/
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@SuppressWarnings("unchecked")
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public static <T> void assertOrderIsNatural(Class<T> clazz, String property, List<T> listOrderedAsc, List<T> listOrderedDesc, int nrOfExpectedElements) {
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Assert.assertEquals(nrOfExpectedElements, listOrderedAsc.size());
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Assert.assertEquals(nrOfExpectedElements, listOrderedDesc.size());
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if (nrOfExpectedElements > 1) {
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for (int i = 1; i < listOrderedAsc.size(); i++) {
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// ascending check
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Comparable c1 = (Comparable) invokeGetter(property, clazz, listOrderedAsc.get(i - 1));
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Comparable c2 = (Comparable) invokeGetter(property, clazz, listOrderedAsc.get(i));
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if (c1 != null && c2 != null) {
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Assert.assertTrue("The ascending list does not have a natural order",c1.compareTo(c2) <= 0); // c1 <= c2 when ascending
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}
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// ascending check
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Comparable c3 = (Comparable) invokeGetter(property, clazz, listOrderedDesc.get(i - 1));
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Comparable c4 = (Comparable) invokeGetter(property, clazz, listOrderedDesc.get(i));
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if (c3 != null && c4 != null) {
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Assert.assertTrue("The descending list does not have a natural order", c3.compareTo(c4) >= 0); // c3 >= c4 when ascending
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}
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}
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}
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}
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private static <T> Object invokeGetter(String property, Class<T> clazz, T obj) {
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try {
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Method getter = clazz.getMethod("get" + property.substring(0, 1).toUpperCase() + property.substring(1));
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return getter.invoke(obj);
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} catch (Exception e) {
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throw new RuntimeException("Couldn't invoke getter for property " + property);
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}
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}
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}
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