public async Task ShouldReadThePrefaceFromStream()
{
var buffer = new BufferReadStream(50, 50);
Array.Copy(ClientPreface.Bytes, buffer.Buffer, ClientPreface.Length);
buffer.Written = ClientPreface.Length;
await ClientPreface.ReadAsync(buffer);
}
public async Task ShouldErrorIfStreamEnds()
{
var buffer = new BufferReadStream(50, 50);
Array.Copy(ClientPreface.Bytes, buffer.Buffer, ClientPreface.Length);
buffer.Written = ClientPreface.Length - 1; // Miss one byte
await Assert.ThrowsAsync <EndOfStreamException>(
() => ClientPreface.ReadAsync(buffer).AsTask());
}
public async Task ShouldYieldAnErrorIfNotEnoughDataIsAvailable()
{
var source = new BufferReadStream(111, 50);
source.Written = 111;
// need 112 bytes, but only 111 are available
var dest = new ArraySegment <byte>(new byte[112]);
await Assert.ThrowsAsync <EndOfStreamException>(
async() => await source.ReadAll(dest));
Assert.Equal(4, source.NrReads);
}
public async Task ShouldErrorIfStreamDoesNotContainPreface()
{
var buffer = new BufferReadStream(50, 50);
Array.Copy(ClientPreface.Bytes, buffer.Buffer, ClientPreface.Length);
buffer.Buffer[22] = (byte)'l';
buffer.Written = ClientPreface.Length;
var ex = await Assert.ThrowsAsync <Exception>(
() => ClientPreface.ReadAsync(buffer).AsTask());
Assert.Equal("Invalid prefix received", ex.Message);
}
public async Task ShouldReadAllRequiredDataFromAConnection()
{
// Read 111 bytes in 3 parts
var source = new BufferReadStream(111, 50);
for (var i = 0; i < 111; i++)
{
source.Buffer[i] = (byte)i;
}
source.Written = 111;
var dest = new byte[111];
var destView = new ArraySegment <byte>(dest);
await source.ReadAll(destView);
for (var i = 0; i < 111; i++)
{
Assert.Equal(source.Buffer[i], dest[i]);
}
Assert.Equal(3, source.NrReads);
}
