public void MulitSegment()
{
var writer = new MaxSizedBufferWriter(MemoryPool <char> .Shared, null);
{
var charSpan = writer.GetSpan(10);
"01234567".AsSpan().CopyTo(charSpan);
writer.Advance(8);
}
{
var charSpan = writer.GetSpan(10_000);
"abc".AsSpan().CopyTo(charSpan);
writer.Advance(3);
}
var buff = writer.Buffer;
Assert.False(buff.IsEmpty);
Assert.False(buff.IsSingleSegment);
var resChars = buff.ToArray();
var resCharSpan = new ReadOnlySpan <char>(resChars);
var str = new string(resCharSpan);
Assert.Equal("01234567abc", str);
}
public void Reset()
{
var writer = new MaxSizedBufferWriter(MemoryPool <char> .Shared, null);
{
var charSpan = writer.GetSpan(10);
"01234567".AsSpan().CopyTo(charSpan);
writer.Advance(8);
}
writer.Reset();
{
var charSpan = writer.GetSpan(3);
"abc".AsSpan().CopyTo(charSpan);
writer.Advance(3);
}
ReadOnlySequence <char> buff = default;
Assert.True(writer.MakeSequence(ref buff));
Assert.True(buff.IsSingleSegment);
var resChars = buff.ToArray();
var resCharSpan = new ReadOnlySpan <char>(resChars);
var str = new string(resCharSpan);
Assert.Equal("abc", str);
writer.Reset();
Assert.False(writer.MakeSequence(ref buff));
}
public void SingleSegment()
{
// one advance call
{
var writer = new MaxSizedBufferWriter(MemoryPool <char> .Shared, null);
{
var charSpan = writer.GetSpan(8);
"01234567".AsSpan().CopyTo(charSpan);
writer.Advance(8);
}
var buff = writer.Buffer;
Assert.False(buff.IsEmpty);
Assert.True(buff.IsSingleSegment);
var resChars = buff.ToArray();
var resCharSpan = new ReadOnlySpan <char>(resChars);
var str = new string(resCharSpan);
Assert.Equal("01234567", str);
}
// two advance calls
{
var writer = new MaxSizedBufferWriter(MemoryPool <char> .Shared, null);
{
var charSpan = writer.GetSpan(16);
"01234567".AsSpan().CopyTo(charSpan);
writer.Advance(8);
}
{
var charSpan = writer.GetSpan(4);
"89AB".AsSpan().CopyTo(charSpan);
writer.Advance(4);
}
var buff = writer.Buffer;
Assert.False(buff.IsEmpty);
Assert.True(buff.IsSingleSegment);
var resChars = buff.ToArray();
var resCharSpan = new ReadOnlySpan <char>(resChars);
var str = new string(resCharSpan);
Assert.Equal("0123456789AB", str);
}
}
public void Errors()
{
// out of range
{
var writer = new MaxSizedBufferWriter(MemoryPool <char> .Shared, null);
// advance
Assert.Throws <ArgumentException>(() => writer.Advance(-1));
// get memory
Assert.Throws <ArgumentException>(() => writer.GetMemory(-1));
}
// too large request
{
var writer = new MaxSizedBufferWriter(new FixSizeMemoryPool(16), null);
Assert.Throws <InvalidOperationException>(() => writer.GetMemory(17));
}
}