com.qrmedia.commons.lang.ClassUtilsAllAnnotatedDeclaredFieldsTest.java Source code

Introduction

Here is the source code for com.qrmedia.commons.lang.ClassUtilsAllAnnotatedDeclaredFieldsTest.java

Source

/*
 * @(#)ClassUtilsAllAnnotatedDeclaredFieldsTest.java     11 Jun 2009
 * 
 * Copyright  2009 Andrew Phillips.
 *
 * ====================================================================
 * 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 com.qrmedia.commons.lang;

import static org.junit.Assert.assertTrue;

import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Collection;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;

import org.apache.commons.collections.CollectionUtils;
import org.junit.Test;

/**
 * Unit tests for the {@link ClassUtils#getAllAnnotatedDeclaredFields(Class, Class)} method.
 * 
 * @author aphillips
 * @since 11 Jun 2009
 * @see ClassUtilsTest
 *
 */
public class ClassUtilsAllAnnotatedDeclaredFieldsTest {

    @Test(expected = IllegalArgumentException.class)
    public void getAllAnnotatedDeclaredFields_nullClass() {
        ClassUtils.getAllAnnotatedDeclaredFields(null, PostConstruct.class);
    }

    @Test(expected = IllegalArgumentException.class)
    public void getAllAnnotatedDeclaredFields_nullAnnotationType() {
        ClassUtils.getAllAnnotatedDeclaredFields(Parent.class, null);
    }

    @SuppressWarnings("unused")
    private static class Parent {
        protected static int nonAnnotatedProtectedStaticField;
        @Resource
        protected static int annotatedProtectedStaticField;
        private static int nonAnnotatedPrivateStaticField;
        @Resource
        private static int annotatedPrivateStaticField;

        protected int nonAnnotatedProtectedField;
        @Resource
        protected int annotatedProtectedField;
        private int nonAnnotatedPrivateField;
        @Resource
        private int annotatedPrivateField;
    }

    @SuppressWarnings("unused")
    private static class Child extends Parent {
        protected static int nonAnnotatedProtectedStaticField;
        @Resource
        protected static int annotatedProtectedStaticField;
        private static int nonAnnotatedPrivateStaticField;
        @Resource
        private static int annotatedPrivateStaticField;

        protected int nonAnnotatedProtectedField;
        @Resource
        protected int annotatedProtectedField;
        private int nonAnnotatedPrivateField;
        @Resource
        private int annotatedPrivateField;
    }

    @Test
    public void getAllAnnotatedDeclaredFields_absentAnnotationType() {
        assertTrue("Expected empty result",
                ClassUtils.getAllAnnotatedDeclaredFields(Child.class, PostConstruct.class).isEmpty());
    }

    @Test
    public void getAllAnnotatedDeclaredFields() throws Exception {
        Collection<Field> expectedFields = Arrays.asList(
                Parent.class.getDeclaredField("annotatedProtectedStaticField"),
                Parent.class.getDeclaredField("annotatedPrivateStaticField"),
                Parent.class.getDeclaredField("annotatedProtectedField"),
                Parent.class.getDeclaredField("annotatedPrivateField"),
                Child.class.getDeclaredField("annotatedProtectedStaticField"),
                Child.class.getDeclaredField("annotatedPrivateStaticField"),
                Child.class.getDeclaredField("annotatedProtectedField"),
                Child.class.getDeclaredField("annotatedPrivateField"));
        assertTrue("Expected " + expectedFields, CollectionUtils.isEqualCollection(expectedFields,
                ClassUtils.getAllAnnotatedDeclaredFields(Child.class, Resource.class)));
    }

}