001 /*
002 * Created on Oct 23, 2010
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
005 * the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
010 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
011 * specific language governing permissions and limitations under the License.
012 *
013 * Copyright @2010-2011 the original author or authors.
014 */
015 package org.fest.assertions.internal;
016
017 import static java.lang.Character.*;
018
019 import static org.fest.assertions.error.ShouldBeLowerCase.shouldBeLowerCase;
020 import static org.fest.assertions.error.ShouldBeUpperCase.shouldBeUpperCase;
021
022 import org.fest.assertions.core.AssertionInfo;
023 import org.fest.util.ComparisonStrategy;
024 import org.fest.util.VisibleForTesting;
025
026 /**
027 * Reusable assertions for <code>{@link Character}</code>s.
028 *
029 * @author Alex Ruiz
030 * @author Joel Costigliola
031 */
032 public class Characters extends Comparables {
033
034 private static final Characters INSTANCE = new Characters();
035
036 /**
037 * Returns the singleton instance of this class.
038 * @return the singleton instance of this class.
039 */
040 public static Characters instance() {
041 return INSTANCE;
042 }
043
044 @VisibleForTesting
045 Characters() {
046 super();
047 }
048
049 public Characters(ComparisonStrategy comparisonStrategy) {
050 super(comparisonStrategy);
051 }
052
053 /**
054 * Asserts that the actual value is a lowercase character.
055 * @param info contains information about the assertion.
056 * @param actual the actual value.
057 * @throws AssertionError if the actual value is {@code null}.
058 * @throws AssertionError if the actual value is not a lowercase character.
059 */
060 public void assertLowerCase(AssertionInfo info, Character actual) {
061 assertNotNull(info, actual);
062 if (isLowerCase(actual)) return;
063 throw failures.failure(info, shouldBeLowerCase(actual));
064 }
065
066 /**
067 * Asserts that the actual value is a uppercase character.
068 * @param info contains information about the assertion.
069 * @param actual the actual value.
070 * @throws AssertionError if the actual value is {@code null}.
071 * @throws AssertionError if the actual value is not a uppercase character.
072 */
073 public void assertUpperCase(AssertionInfo info, Character actual) {
074 assertNotNull(info, actual);
075 if (isUpperCase(actual)) return;
076 throw failures.failure(info, shouldBeUpperCase(actual));
077 }
078 }