public ReadBufferingStreamTests(ITestOutputHelper logger)
{
this.logger = logger;
this.underlyingStream = new MemoryStream(UnderlyingStreamBuffer.ToArray(), writable: false);
Assert.True(UnderlyingStreamBuffer.Length > DefaultCapacity);
this.bufferingStream = new ReadBufferingStream(this.underlyingStream, DefaultCapacity);
}
public async Task ReadAsync_Returns0AtEndOfStream()
{
var underlyingStream = new MemoryStream(new byte[] { 1, 2, 3 });
this.bufferingStream = new ReadBufferingStream(underlyingStream, 5);
var buffer = new byte[underlyingStream.Length + 1];
Assert.Equal(3, await this.bufferingStream.ReadAsync(buffer, 0, buffer.Length));
Assert.Equal(0, await this.bufferingStream.ReadAsync(buffer, 0, buffer.Length));
}
public void Dispose_DisposesStream(bool disposeStream)
{
this.bufferingStream = new ReadBufferingStream(this.underlyingStream, 10, disposeStream);
this.bufferingStream.Dispose();
if (disposeStream)
{
Assert.Throws <ObjectDisposedException>(() => this.underlyingStream.Seek(0, SeekOrigin.Begin));
}
else
{
this.underlyingStream.Seek(0, SeekOrigin.Begin);
}
}
public async Task Read_Returns0AtEndOfStream()
{
var underlyingStream = new MemoryStream(new byte[] { 1, 2, 3 });
this.bufferingStream = new ReadBufferingStream(underlyingStream, 5);
await this.bufferingStream.FillBufferAsync();
var buffer = new byte[underlyingStream.Length + 1];
Assert.Equal(3, this.bufferingStream.Read(buffer, 0, buffer.Length));
Assert.Throws <InvalidOperationException>(() => this.bufferingStream.Read(buffer, 0, buffer.Length));
await this.bufferingStream.FillBufferAsync();
Assert.Equal(0, this.bufferingStream.Read(buffer, 0, buffer.Length));
}
public async Task ReadByte_ReturnsMinus1AtEndOfStream()
{
var underlyingStream = new MemoryStream(new byte[1] {
5
});
this.bufferingStream = new ReadBufferingStream(underlyingStream, 5);
await this.bufferingStream.FillBufferAsync();
Assert.Equal(5, this.bufferingStream.ReadByte());
Assert.Throws <InvalidOperationException>(() => this.bufferingStream.ReadByte());
await this.bufferingStream.FillBufferAsync();
Assert.Equal(-1, this.bufferingStream.ReadByte());
// Do it again, just to make sure it's repeatable.
await this.bufferingStream.FillBufferAsync();
Assert.Equal(-1, this.bufferingStream.ReadByte());
}
public void BufferCapacity()
{
Assert.Equal(DefaultCapacity, this.bufferingStream.BufferCapacity);
this.bufferingStream = new ReadBufferingStream(this.underlyingStream, DefaultCapacity * 2);
Assert.Equal(DefaultCapacity * 2, this.bufferingStream.BufferCapacity);
}