public void OverflowWithUtf32AtEnd()
{
ReadToCache rtc = new ReadToCache();
Random r = new Random();
byte[] bbuffer = new byte[2048];
// Ensure that each byte is ASCII for simplicity
for (int i = 0; i < 1022; i++)
{
bbuffer[i] = (byte)r.Next(48, 126);
}
bbuffer[1023] = 0xF3;
bbuffer[1024] = 0xA0;
bbuffer[1025] = 0x82;
bbuffer[1026] = 0x84;
for (int i = 1027; i < bbuffer.Length; i++)
{
bbuffer[i] = (byte)r.Next(48, 126);
}
CircularBuffer <byte> buffer = new CircularBuffer <byte>(4096);
buffer.Append(bbuffer);
// We now peek 1023 times, which we shouldn't have an overflow
for (int i = 0; i < 1023; i++)
{
Assert.That(rtc.PeekChar(buffer), Is.True);
}
// Shouldn't overflow, but we've now got 1025 characters
Assert.That(rtc.PeekChar(buffer), Is.True);
// With this one we should overflow.
// m_ReadOverflow = 1
// m_ReadOverflowChar[0] is the first character
// m_ReadOverflowUtf32 = false
Assert.That(rtc.PeekChar(buffer), Is.True);
// Check that the next overflow is still correct
// m_ReadOverflow, m_ReadOverflowChar, m_ReadOverflowUtf32 shouldn't change
Assert.That(rtc.PeekChar(buffer), Is.True);
rtc.Reset(true);
}
public void OverflowWithUtf32AtBeginning()
{
ReadToCache rtc = new ReadToCache();
Random r = new Random();
byte[] bbuffer = new byte[2048];
bbuffer[0] = 0xF3;
bbuffer[1] = 0xA0;
bbuffer[2] = 0x82;
bbuffer[3] = 0x84;
// Ensure that each byte is ASCII for simplicity
for (int i = 4; i < bbuffer.Length; i++)
{
bbuffer[i] = (byte)r.Next(48, 126);
}
CircularBuffer <byte> buffer = new CircularBuffer <byte>(4096);
buffer.Append(bbuffer);
// We now peek 1023 times, which we shouldn't have an overflow
for (int i = 0; i < 1023; i++)
{
Assert.That(rtc.PeekChar(buffer), Is.True);
}
// 1024 times, fills the buffer. No overflow expected here.
Assert.That(rtc.PeekChar(buffer), Is.True);
// With this one we should overflow.
// m_ReadOverflow = 4
// m_ReadOverflowChar[0] and [1] is the first character
// m_ReadOverflowUtf32 = true
Assert.That(rtc.PeekChar(buffer), Is.True);
// Check that the next overflow is still correct
// m_ReadOverflow, m_ReadOverflowChar, m_ReadOverflowUtf32 shouldn't change
Assert.That(rtc.PeekChar(buffer), Is.True);
rtc.Reset(true);
}