public virtual void TestGimpGreyscaleWithManyChunks()
{
PngDirectory directory = ProcessFile <PngDirectory>("Tests/Data/gimp-8x12-greyscale-alpha-time-background.png");
Sharpen.Tests.AreEqual(8, directory.GetInt(PngDirectory.TagImageWidth));
Sharpen.Tests.AreEqual(12, directory.GetInt(PngDirectory.TagImageHeight));
Sharpen.Tests.AreEqual(8, directory.GetInt(PngDirectory.TagBitsPerSample));
Sharpen.Tests.AreEqual(4, directory.GetInt(PngDirectory.TagColorType));
Sharpen.Tests.AreEqual(0, directory.GetInt(PngDirectory.TagCompressionType));
Sharpen.Tests.AreEqual(0, directory.GetInt(PngDirectory.TagFilterMethod));
Sharpen.Tests.AreEqual(0, directory.GetInt(PngDirectory.TagInterlaceMethod));
Sharpen.Tests.AreEqual(0.45455, directory.GetDouble(PngDirectory.TagGamma), 0.00001);
NUnit.Framework.CollectionAssert.AreEqual(new sbyte[] { 0, 52 }, directory.GetByteArray(PngDirectory.TagBackgroundColor));
//noinspection ConstantConditions
//Sharpen.Tests.AreEqual("Tue Jan 01 04:08:30 GMT 2013", directory.GetDate(PngDirectory.TagLastModificationTime).ToString());
// HACK: test modification which solves problem with ToString conversion
TimeZoneInfo gmt = Sharpen.Extensions.GetTimeZone("GMT");
Calendar calendar = Calendar.GetInstance(gmt);
calendar.Set(2013, 00, 01, 04, 08, 30);
Sharpen.Tests.AreEqual(calendar.GetTime(), directory.GetDate(PngDirectory.TagLastModificationTime));
IList <KeyValuePair> pairs = (IList <KeyValuePair>)directory.GetObject(PngDirectory.TagTextualData);
NUnit.Framework.Assert.IsNotNull(pairs);
Sharpen.Tests.AreEqual(1, pairs.Count);
Sharpen.Tests.AreEqual("Comment", pairs[0].GetKey());
Sharpen.Tests.AreEqual("Created with GIMP", pairs[0].GetValue());
}