public void ShrinkPositionStaysAtEnd()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
buffer.Write(new byte[] { 0xA, 0xB, 0xC }, 0, 3);
buffer.Position.Should().Be(3);
buffer.Length.Should().Be(3);
buffer.SetLength(2);
buffer.Position.Should().Be(2);
buffer.Length.Should().Be(2);
}
}
public void PositionTest()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
byte[] data = new byte[] { 0xA, 0xB, 0xC };
buffer.Write(data, 0, data.Length);
buffer.Position.Should().Be(data.Length);
for (int i = 0; i < data.Length; i++)
{
buffer.Position = i;
buffer.ReadByte().Should().Be(data[i]);
}
}
}
public void SeekSucceeds()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
buffer.Length.Should().Be(0);
buffer.Write(new byte[] { 0xA, 0xB, 0xC }, 0, 3);
buffer.Length.Should().Be(3);
buffer.Seek(0, SeekOrigin.Begin);
buffer.ReadByte().Should().Be(0xA);
buffer.Seek(-1, SeekOrigin.Current);
buffer.ReadByte().Should().Be(0xA);
buffer.Seek(1, SeekOrigin.Current);
buffer.ReadByte().Should().Be(0xC);
buffer.Seek(1, SeekOrigin.Begin);
buffer.ReadByte().Should().Be(0xB);
buffer.Seek(-2, SeekOrigin.End);
buffer.ReadByte().Should().Be(0xB);
}
}
public void AppendTwice()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
buffer.Length.Should().Be(0);
buffer.Write(new byte[] { 0xA, 0xB, 0xC }, 0, 3);
buffer.Position.Should().Be(3);
buffer.Length.Should().Be(3);
buffer.Position = 0;
byte[] output = new byte[3];
buffer.Read(output, 0, 3);
buffer.Position.Should().Be(3);
output.ShouldAllBeEquivalentTo(new byte[] { 0xA, 0xB, 0xC });
buffer.Write(new byte[] { 0xD, 0xE, 0xF }, 0, 3);
buffer.Position.Should().Be(6);
buffer.Length.Should().Be(6);
buffer.Position = 0;
output = new byte[6];
buffer.Read(output, 0, 6);
output.ShouldAllBeEquivalentTo(new byte[] { 0xA, 0xB, 0xC, 0xD, 0xE, 0xF });
}
}
public void EmptyBufferThrowsOnPositiveCountWrite()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
Action action = () => buffer.Write(new byte[0], 0, 1);
action.ShouldThrow<ArgumentException>();
}
}
public void EmptyBufferDoesNotThrowOnPositiveOffsetWriteOfNoCharacters()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
buffer.Write(new byte[0], 1, 0);
}
}
public void EmptyBufferThrowsOnNegativeOffsetWrite()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
Action action = () => buffer.Write(new byte[0], -1, 0);
action.ShouldThrow<ArgumentOutOfRangeException>();
}
}
public void EmptyBufferThrowsOnNullBufferWrite()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
Action action = () => buffer.Write(null, 0, 0);
action.ShouldThrow<ArgumentNullException>();
}
}
public void EmptyBufferCanWriteNothing()
{
using (StreamBuffer buffer = new StreamBuffer(0))
{
buffer.Write(new byte[0], 0, 0);
}
}
