001    /*
002     * Created on Oct 22, 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 org.fest.assertions.error.ShouldNotBeEqual.shouldNotBeEqual;
018    import static org.fest.assertions.error.ShouldBeEqual.shouldBeEqual;
019    
020    import org.fest.assertions.core.AssertionInfo;
021    import org.fest.util.VisibleForTesting;
022    
023    /**
024     * Reusable assertions for <code>{@link Boolean}</code>s.
025     *
026     * @author Alex Ruiz
027     */
028    public class Booleans {
029    
030      private static final Booleans INSTANCE = new Booleans();
031    
032      /**
033       * Returns the singleton instance of this class.
034       * @return the singleton instance of this class.
035       */
036      public static Booleans instance() {
037        return INSTANCE;
038      }
039    
040      @VisibleForTesting Failures failures = Failures.instance();
041    
042      @VisibleForTesting Booleans() {}
043    
044      /**
045       * Asserts that two booleans are equal.
046       * @param info contains information about the assertion.
047       * @param actual the actual value.
048       * @param expected the expected value.
049       * @throws AssertionError if the actual value is {@code null}.
050       * @throws AssertionError if the actual value is not equal to the expected one. This method will throw a
051       * {@code org.junit.ComparisonFailure} instead if JUnit is in the classpath and the expected and actual values are not
052       * equal.
053       */
054      public void assertEqual(AssertionInfo info, Boolean actual, boolean expected) {
055        assertNotNull(info, actual);
056        if (actual.booleanValue() == expected) return;
057        throw failures.failure(info, shouldBeEqual(actual, expected));
058      }
059    
060      /**
061       * Asserts that two longs are not equal.
062       * @param info contains information about the assertion.
063       * @param actual the actual value.
064       * @param other the value to compare the actual value to.
065       * @throws AssertionError if the actual value is {@code null}.
066       * @throws AssertionError if the actual value is equal to the other one.
067       */
068      public void assertNotEqual(AssertionInfo info, Boolean actual, boolean other) {
069        assertNotNull(info, actual);
070        if (actual.booleanValue() != other) return;
071        throw failures.failure(info, shouldNotBeEqual(actual, other));
072      }
073    
074      private static void assertNotNull(AssertionInfo info, Boolean actual) {
075        Objects.instance().assertNotNull(info, actual);
076      }
077    }