/*
 * #%L
 * ImageJ software for multidimensional image processing and analysis.
 * %%
 * Copyright (C) 2009 - 2014 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
 * %%
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 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package net.imagej.updater;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.net.URL;

import org.junit.Test;

/**
 * Tests the {@link DllFile} class.
 * 
 * @author Johannes Schindelin
 */
public class DllFileTest {
	@Test
	public void testRecompiledDll() {
		final URL emptyDllURL = getClass().getResource("/empty.dll");
		assertEquals("file", emptyDllURL.getProtocol());
		final File emptyDll = new File(emptyDllURL.getPath());
		assertTrue(emptyDll.exists());

		final URL recompiledDllURL = getClass().getResource("/recompiled.dll");
		assertEquals("file", recompiledjustedDllURL.getProtocol());
		final File recompiledDll = new File(recompiledDllURL.getPath());
		assertTrue(recompiledDll.exists());

		assertTrue(DllFile.equals(emptyDll, recompiledDll));
	}
}

Verify that the DllFile class correctly compares real .dll files
Verify that the DllFile class correctly compares real .dll files

When recompiling an empty .c file into a .dll, it is a pretty surprising
thing for the unsuspecting developer that the result is not byte-wise
identical. The reason is that several time date stamps are part of the
.dll file format, and that there is a checksum, too, that changes with
the time date stamps, too.

To handle such cases, we just added a class to compare .dll files and
report whether they are functionally identical.

This commit adds a unit test.

Signed-off-by: Johannes Schindelin <53fb8db7833fca1e1746dd8592f61048d350f64c@gmx.de>
