public async Task MultiReadCannotWritePastTheEndOfTheDestinationBufferAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[3];
// 2nd read is too big for the output buffer
await stream.ReadAsync(output, 0, 2);
await Assert.ThrowsAsync <ArgumentException>(async() => await stream.ReadAsync(output, 2, 2));
}
public async Task ReadZeroBytesFromTheEndOfTheStreamAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[4];
await stream.ReadAsync(output, 0, 4);
int read = await stream.ReadAsync(output, 0, 4);
Assert.Equal(0, read);
}
public async Task CanDoMultipleReadsFromStreamIntoBufferAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[4];
await stream.ReadAsync(output, 0, 2);
int read = await stream.ReadAsync(output, 2, 2);
Assert.Equal(2, read);
Assert.Equal(new byte[] { 42, 42, 42, 42 }, output);
}
public async Task MultiReadCannotPassTheEndOfTheStreamAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[6];
// 2nd read is too big for the stream
await stream.ReadAsync(output, 0, 2);
await stream.ReadAsync(output, 0, 4);
Assert.Equal(new byte[] { 42, 42, 0, 0, 0, 0 }, output);
}
public async Task CanGetConsistentStreamLengthAcrossReadsAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[4];
await stream.ReadAsync(output, 0, 4);
Assert.Equal(this.testBuffer.WriterIndex, stream.Length);
await stream.ReadAsync(output, 0, 4);
Assert.Equal(this.testBuffer.WriterIndex, stream.Length);
}
public async Task CanReadCountBytesIntoBufferAtOffsetAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[4];
int read = await stream.ReadAsync(output, 1, 2);
Assert.Equal(2, read);
Assert.Equal(new byte[] { 0, 42, 42, 0 }, output);
}
public async Task CanReadCountBytesIntoBufferAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[4];
int read = await stream.ReadAsync(output, 0, output.Length);
Assert.Equal(4, read);
Assert.Equal(new byte[] { 42, 42, 42, 42 }, output);
}
public async Task SingleReadCannotWritePastTheEndOfTheDestinationBufferAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
var output = new byte[3];
// single read is too big for the output buffer
var e = await Assert.ThrowsAsync <ArgumentException>(async() => await stream.ReadAsync(output, 0, 4));
Assert.Equal("Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection.", e.Message);
}
public async Task CanGetTheStreamPositionAsync()
{
var stream = new ReadOnlyByteBufferStream(this.testBuffer, false);
Assert.Equal(0, stream.Position);
var output = new byte[4];
int read = await stream.ReadAsync(output, 0, 2);
Assert.Equal(2, stream.Position);
}