src/test/java/org/apache/commons/imaging/formats/bmp/BmpImageParserTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.imaging.formats.bmp;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.io.File;
import java.io.IOException;
import java.util.Collections;

import org.apache.commons.imaging.ImageInfo;
import org.apache.commons.imaging.ImageReadException;
import org.junit.jupiter.api.Test;

/**
 * Tests for the {@link BmpImageParser}.
 * @since 1.0-alpha3
 */
public class BmpImageParserTest {

    /**
     * For https://issues.apache.org/jira/browse/IMAGING-264.
     * @throws IOException
     * @throws ImageReadException
     */
    @Test
    public void testImageWidthRounding() throws ImageReadException, IOException {
        final String file = "/images/bmp/IMAGING-264/test-72_6-dpi.bmp";
        final File bmp = new File(BmpImageParser.class.getResource(file).getFile());
        final BmpImageParser parser = new BmpImageParser();
        final ImageInfo imageInfo = parser.getImageInfo(bmp, Collections.emptyMap());
        assertEquals(73, imageInfo.getPhysicalWidthDpi(), "Expected 72.6 resolution to be rounded to 73");
    }

    /**
     * For https://issues.apache.org/jira/browse/IMAGING-279.
     * @throws IOException
     * @throws ImageReadException
     */
    @Test
    public void testImageForNegativeArraySizeException() throws ImageReadException, IOException {
        final String file = "/images/bmp/IMAGING-279/negative_array_size_exception.bmp";
        final File bmp = new File(BmpImageParser.class.getResource(file).getFile());
        final BmpImageParser parser = new BmpImageParser();
        assertThrows(IOException.class, () -> {
            parser.getImageInfo(bmp, Collections.emptyMap());
        });
    }
}