001    /*
002     * Created on Jan 28, 2011
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 @2011 the original author or authors.
014     */
015    package org.fest.assertions.error;
016    
017    import static org.fest.util.Systems.LINE_SEPARATOR;
018    
019    import java.io.File;
020    import java.io.InputStream;
021    import java.util.List;
022    
023    /**
024     * Creates an error message indicating that an assertion that verifies that two files/inputStreams have equal content failed.
025     * 
026     * @author Yvonne Wang
027     * @author Matthieu Baechler
028     */
029    public class ShouldHaveEqualContent extends BasicErrorMessageFactory {
030    
031      /**
032       * Creates a new <code>{@link ShouldHaveEqualContent}</code>.
033       * @param actual the actual file in the failed assertion.
034       * @param expected the expected file in the failed assertion.
035       * @param diffs the differences between {@code actual} and {@code expected}.
036       * @return the created {@code ErrorMessageFactory}.
037       */
038      public static ErrorMessageFactory shouldHaveEqualContent(File actual, File expected, List<String> diffs) {
039        return new ShouldHaveEqualContent(actual, expected, diffsAsString(diffs));
040      }
041    
042      /**
043       * Creates a new <code>{@link ShouldHaveEqualContent}</code>.
044       * @param actual the actual InputStream in the failed assertion.
045       * @param expected the expected Stream in the failed assertion.
046       * @param diffs the differences between {@code actual} and {@code expected}.
047       * @return the created {@code ErrorMessageFactory}.
048       */
049      public static ErrorMessageFactory shouldHaveEqualContent(InputStream actual, InputStream expected, List<String> diffs) {
050        return new ShouldHaveEqualContent(actual, expected, diffsAsString(diffs));
051      }
052    
053      private static String diffsAsString(List<String> diffs) {
054        StringBuilder b = new StringBuilder();
055        for (String diff : diffs)
056          b.append(LINE_SEPARATOR).append(diff);
057        return b.toString();
058      }
059    
060      private ShouldHaveEqualContent(File actual, File expected, String diffs) {
061        super("file:<%s> and file:<%s> do not have equal content:" + diffs, actual, expected);
062      }
063    
064      private ShouldHaveEqualContent(InputStream actual, InputStream expected, String diffs) {
065        super("InputStreams do not have equal content:" + diffs, actual, expected);
066      }
067    }