public async Task WriteBytesAsync_should_have_expected_effect_for_offset(int offset, byte[] expectedBytes)
{
var stream = new MemoryStream();
var source = new ByteArrayBuffer(new byte[] { 1, 2, 3 });
await stream.WriteBytesAsync(source, offset, 1, CancellationToken.None);
stream.ToArray().Should().Equal(expectedBytes);
}
public async Task WriteBytesAsync_should_have_expected_effect_for_partial_writes(int testCase, int[] partition)
{
var stream = new MemoryStream();
var source = Substitute.For<IByteBuffer>();
source.Length = 3;
var bytes = new byte[] { 1, 2, 3 };
var n = 0;
source.AccessBackingBytes(Arg.Any<int>()).Returns(x =>
{
var l = partition[n++];
var o = (int)x[0];
return new ArraySegment<byte>(bytes, o, l);
});
await stream.WriteBytesAsync(source, 0, 3, CancellationToken.None);
stream.ToArray().Should().Equal(bytes);
}
public async Task WriteBytesAsync_should_have_expected_effect_for_partial_writes(int testCase, int[] partition)
{
var stream = new MemoryStream();
var mockSource = new Mock<IByteBuffer>();
mockSource.SetupGet(s => s.Length).Returns(3);
var bytes = new byte[] { 1, 2, 3 };
var n = 0;
mockSource.Setup(s => s.AccessBackingBytes(It.IsAny<int>()))
.Returns((int position) =>
{
var length = partition[n++];
return new ArraySegment<byte>(bytes, position, length);
});
await stream.WriteBytesAsync(mockSource.Object, 0, 3, CancellationToken.None);
stream.ToArray().Should().Equal(bytes);
}
