public void BitWriterWideTest()
{
using (MemoryStream ms = new MemoryStream()) {
BitWriter bw = new BitWriter()
{
Output = ms,
CodeLength = 12,
};
bw.WriteBits(5);
bw.WriteBits(7);
bw.WriteBits(3);
bw.WriteBits(7);
bw.FlushBits();
bw.FlushBytes();
byte[] bytes = ms.ToArray();
Assert.AreEqual(7, bytes.Length);
Assert.AreEqual(0x06, bytes[0]);
Assert.AreEqual(0x05, bytes[1]);
Assert.AreEqual(0x70, bytes[2]);
Assert.AreEqual(0x00, bytes[3]);
Assert.AreEqual(0x03, bytes[4]);
Assert.AreEqual(0x70, bytes[5]);
Assert.AreEqual(0x00, bytes[6]);
}
}
public void BitWriterEmptyTest()
{
using (MemoryStream ms = new MemoryStream()) {
BitWriter bw = new BitWriter()
{
Output = ms,
CodeLength = 4,
};
bw.FlushBits();
bw.FlushBytes();
byte[] bytes = ms.ToArray();
Assert.AreEqual(0, bytes.Length);
}
}
public void BitWriterOneUnitTest()
{
using (MemoryStream ms = new MemoryStream()) {
BitWriter bw = new BitWriter()
{
Output = ms,
CodeLength = 4,
};
bw.WriteBits(5);
bw.FlushBits();
bw.FlushBytes();
byte[] bytes = ms.ToArray();
Assert.AreEqual(2, bytes.Length);
Assert.AreEqual(0x01, bytes[0]);
Assert.AreEqual(0x05, bytes[1]);
}
}
public void BitWriterUnalignedTest()
{
using (MemoryStream ms = new MemoryStream()) {
BitWriter bw = new BitWriter()
{
Output = ms,
CodeLength = 5,
};
bw.WriteBits(5);
bw.WriteBits(7);
bw.WriteBits(3);
bw.WriteBits(7);
bw.FlushBits();
bw.FlushBytes();
byte[] bytes = ms.ToArray();
Assert.AreEqual(4, bytes.Length);
Assert.AreEqual(0x03, bytes[0]);
Assert.AreEqual(0xE5, bytes[1]);
Assert.AreEqual(0x8C, bytes[2]);
Assert.AreEqual(0x03, bytes[3]);
}
}
public void BitWriterWpTest()
{
using (MemoryStream ms = new MemoryStream()) {
BitWriter bw = new BitWriter()
{
Output = ms,
CodeLength = 9,
};
// http://en.wikipedia.org/wiki/Graphics_Interchange_Format
bw.WriteBits(0x100);
bw.WriteBits(0x028);
bw.WriteBits(0x0FF);
bw.WriteBits(0x103);
bw.WriteBits(0x102);
bw.WriteBits(0x103);
bw.WriteBits(0x106);
bw.WriteBits(0x107);
bw.WriteBits(0x101);
bw.FlushBits();
bw.FlushBytes();
byte[] bytes = ms.ToArray();
Assert.AreEqual(12, bytes.Length);
Assert.AreEqual(0x0B, bytes[0]);
Assert.AreEqual(0x00, bytes[1]);
Assert.AreEqual(0x51, bytes[2]);
Assert.AreEqual(0xFC, bytes[3]);
Assert.AreEqual(0x1B, bytes[4]);
Assert.AreEqual(0x28, bytes[5]);
Assert.AreEqual(0x70, bytes[6]);
Assert.AreEqual(0xA0, bytes[7]);
Assert.AreEqual(0xC1, bytes[8]);
Assert.AreEqual(0x83, bytes[9]);
Assert.AreEqual(0x01, bytes[10]);
Assert.AreEqual(0x01, bytes[11]);
}
}
