public void TestPeekableStreamRead()
{
var inputStr = "← ↔ →";
var buffer = inputStr.ToUtf8();
for (int i = 1; i <= buffer.Length; i++)
{
using (var mem = new MemoryStream(buffer))
using (var slow = new SlowStream(mem, i))
using (var peekable = new PeekableStream(slow))
{
using (var peek = peekable.GetPeekStream())
{
var buf = peek.Read(11);
Assert.AreEqual(inputStr, buf.FromUtf8());
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
var buf2 = peekable.Read(11);
Assert.AreEqual(inputStr, buf2.FromUtf8());
Assert.AreEqual(0, peekable.Read(buf2, 0, 1));
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(buf2, 0, 1));
}
}
}
public void TestSingleBytePeekableStreamRead()
{
using (var mem = new MemoryStream(new byte[] { 47 }))
using (var peekable = new PeekableStream(mem))
{
var buf = new byte[1];
using (var peek = peekable.GetPeekStream())
{
Assert.AreEqual(1, peek.Read(buf, 0, 1));
Assert.AreEqual(buf[0], 47);
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
Assert.AreEqual(1, peekable.Read(buf, 0, 1));
Assert.AreEqual(buf[0], 47);
Assert.AreEqual(0, peekable.Read(buf, 0, 1));
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
}
public void TestEmptyPeekableStreamRead()
{
using (var mem = new MemoryStream(new byte[0]))
using (var peekable = new PeekableStream(mem))
{
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(new byte[1], 0, 1));
Assert.AreEqual(0, peekable.Read(new byte[1], 0, 1));
}
}
public void TestSingleBytePeekableStreamRead()
{
using (var mem = new MemoryStream(new byte[] { 47 }))
using (var peekable = new PeekableStream(mem))
{
var buf = new byte[1];
using (var peek = peekable.GetPeekStream())
{
Assert.AreEqual(1, peek.Read(buf, 0, 1));
Assert.AreEqual(buf[0], 47);
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
Assert.AreEqual(1, peekable.Read(buf, 0, 1));
Assert.AreEqual(buf[0], 47);
Assert.AreEqual(0, peekable.Read(buf, 0, 1));
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
}
public void TestEmptyPeekableStreamRead()
{
using (var mem = new MemoryStream(new byte[0]))
using (var peekable = new PeekableStream(mem))
{
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(new byte[1], 0, 1));
Assert.AreEqual(0, peekable.Read(new byte[1], 0, 1));
}
}
/// <summary>
/// Reads a control code from the stream at the current position. If there is no control code at the current position,
/// returns <c>-1</c>. Otherwise returns the code read. Throws <see cref="EndOfStreamException"/> if the stream ends in
/// the middle of a control code.
/// </summary>
public virtual int ReadControlCode()
{
using (var peek = _stream.GetPeekStream())
{
byte[] read = peek.Read(2);
if (read.Length == 0)
{
return(-1);
}
else if (read.Length == 1)
{
throw new EndOfStreamException("The end of the stream was encountered in the middle of an escape sequence.");
}
if (read[0] != 255)
{
return(-1);
}
_stream.SkipExactly(2);
return(read[1]);
}
}
public void TestPeekableStreamRead()
{
var inputStr = "← ↔ →";
var buffer = inputStr.ToUtf8();
for (int i = 1; i <= buffer.Length; i++)
{
using (var mem = new MemoryStream(buffer))
using (var slow = new SlowStream(mem, i))
using (var peekable = new PeekableStream(slow))
{
using (var peek = peekable.GetPeekStream())
{
var buf = peek.Read(11);
Assert.AreEqual(inputStr, buf.FromUtf8());
Assert.AreEqual(0, peek.Read(buf, 0, 1));
}
var buf2 = peekable.Read(11);
Assert.AreEqual(inputStr, buf2.FromUtf8());
Assert.AreEqual(0, peekable.Read(buf2, 0, 1));
using (var peek = peekable.GetPeekStream())
Assert.AreEqual(0, peek.Read(buf2, 0, 1));
}
}
}
