public void Clear_WorksIfBufferHasNotBeenWrittenTo()
{
// Arrange
var buffer = new PagedCharBuffer(new CharArrayBufferSource());
// Act
buffer.Clear();
// Assert
Assert.Equal(0, buffer.Length);
}
public void Clear_ReturnsPagesToBufferSource()
{
// Arrange
var bufferSource = new Mock <ICharBufferSource>();
bufferSource.Setup(s => s.Rent(PagedCharBuffer.PageSize))
.Returns(new char[PagedCharBuffer.PageSize]);
var buffer = new PagedCharBuffer(bufferSource.Object);
// Act
buffer.Append(new string('a', PagedCharBuffer.PageSize * 3 + 4));
buffer.Clear();
// Assert
Assert.Equal(0, buffer.Length);
bufferSource.Verify(s => s.Return(It.IsAny <char[]>()), Times.Exactly(3));
}
public void UseAfterClear_Works()
{
// Arrange
var buffer = new PagedCharBuffer(new CharArrayBufferSource());
// Act - 1
buffer.Append(new string('a', PagedCharBuffer.PageSize));
buffer.Append(new string('b', 10));
buffer.Clear();
// Assert - 1
Assert.Equal(0, buffer.Length);
Assert.Single(buffer.Pages);
// Act - 2
buffer.Append("efgh");
// Assert - 2
Assert.Equal(4, buffer.Length);
Assert.Single(buffer.Pages);
Assert.Equal(new[] { 'e', 'f', 'g', 'h' }, buffer.Pages[0].Take(buffer.Length));
}
private async Task FlushAsyncAwaited()
{
var length = _charBuffer.Length;
Debug.Assert(length > 0);
var pages = _charBuffer.Pages;
var count = pages.Count;
for (var i = 0; i < count; i++)
{
var page = pages[i];
var pageLength = Math.Min(length, page.Length);
if (pageLength != 0)
{
await _inner.WriteAsync(page, index : 0, count : pageLength);
}
length -= pageLength;
}
Debug.Assert(length == 0);
_charBuffer.Clear();
}