public void StartsAtBeginningReturnsFirstByte()
{
var buffer = new byte[] { 0x01, 0x02, 0x03 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
Assert.Equal(0, reader.Position);
var expected = 1;
var actual = reader.Read();
Assert.Equal(expected, actual);
Assert.Equal(1, reader.Position);
}
}
public void ReadsLastByte()
{
var buffer = new byte[] { 0x01, 0x02, 0x03 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
reader.Seek(2, SeekOrigin.Begin);
Assert.Equal(2, reader.Position);
var expected = 3;
var actual = reader.Read();
Assert.Equal(expected, actual);
Assert.Equal(3, reader.Position);
}
}
public void StartsAtMiddleReturnsMiddle()
{
var buffer = new byte[] { 0x01, 0x02, 0x03 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
reader.Seek(1, SeekOrigin.Begin);
Assert.Equal(1, reader.Position);
var expected = 2;
var actual = reader.Read();
Assert.Equal(expected, actual);
Assert.Equal(2, reader.Position);
}
}
public void StartsAtEndReturnsNegativeOne()
{
var buffer = new byte[] { 0x01, 0x02, 0x03 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
reader.Seek(3, SeekOrigin.Begin);
Assert.Equal(3, reader.Position);
var expected = -1;
var actual = reader.Read();
Assert.Equal(expected, actual);
Assert.Equal(3, reader.Position);
}
}
public void StartsAtBeginningReturnsFullBuffer()
{
var buffer = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
var readBuffer = new byte[2];
Assert.Equal(0, reader.Position);
var bytesRead = reader.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(2, reader.Position);
Assert.Equal(2, bytesRead);
Assert.Equal(new byte[] { 0x01, 0x02 }, readBuffer);
}
}
public void ReadsPartialAtEnd()
{
var buffer = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
var readBuffer = new byte[2];
reader.Seek(4, SeekOrigin.Begin);
Assert.Equal(4, reader.Position);
var bytesRead = reader.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(5, reader.Position);
Assert.Equal(1, bytesRead);
Assert.Equal(new byte[] { 0x05, 0x00 }, readBuffer);
}
}
public void StartsAtEndReturnsNegativeOne()
{
var buffer = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
using (var memoryStream = new MemoryStream(buffer))
{
var reader = new PdfStreamReader(memoryStream, 512);
var readBuffer = new byte[2];
reader.Seek(5, SeekOrigin.Begin);
Assert.Equal(5, reader.Position);
var bytesRead = reader.Read(readBuffer, 0, readBuffer.Length);
Assert.Equal(5, reader.Position);
Assert.Equal(-1, bytesRead);
Assert.Equal(new byte[] { 0x00, 0x00 }, readBuffer);
}
}