public void Concatenates_AllEnumerableElements_Bytes()
{
var element = new object();
var elementBytes = new[] { (byte)0x01 };
var elementExtractorMock = new Mock <IByteExtractor>();
elementExtractorMock.Setup(m => m.Extract(It.IsAny <object>(), It.IsAny <Stream>()))
.Callback <object, Stream>((obj, stream) => stream.Write(elementBytes));
var elementExtractor = elementExtractorMock.Object;
var arrayExtractor = new EnumerableByteExtractor(elementExtractor);
using (var stream = new MemoryStream())
{
const int repeats = 1;
arrayExtractor.Extract(Enumerable.Repeat(element, repeats), stream);
var expected = Enumerable.Repeat(elementBytes, repeats).SelectMany(x => x);
Check.That(stream.ToArray()).ContainsExactly(expected);
}
using (var stream = new MemoryStream())
{
const int repeats = 10;
arrayExtractor.Extract(Enumerable.Repeat(element, repeats), stream);
var expected = Enumerable.Repeat(elementBytes, repeats).SelectMany(x => x);
Check.That(stream.ToArray()).ContainsExactly(expected);
}
}
public void Empty_Enumerable_WritesNothing()
{
var elementExtractorMock = new Mock <IByteExtractor>();
elementExtractorMock.Setup(m => m.Extract(It.IsAny <object>(), It.IsAny <Stream>()))
.Callback <object, Stream>((obj, stream) => stream.Write(new byte[] { 1 }));
var elementExtractor = elementExtractorMock.Object;
var arrayExtractor = new EnumerableByteExtractor(elementExtractor);
using (var stream = new MemoryStream())
{
arrayExtractor.Extract(new List <object>(), stream);
Check.That(stream.ToArray()).IsEmpty();
}
}