public void AppendWithChar_AddsCharacterToNewPage_AfterLengthFallback()
{
// Arrange
// Imitate ArrayPool<char>.Shared after it falls back from its default char[1024] Bucket to the next one.
var bufferSource = new Mock <ICharBufferSource>();
bufferSource
.Setup(s => s.Rent(PagedCharBuffer.PageSize))
.Returns(() => new char[2 * PagedCharBuffer.PageSize]);
var buffer = new PagedCharBuffer(bufferSource.Object);
var stringToAppend = new string('a', 2 * PagedCharBuffer.PageSize);
var charToAppend = 't';
// Act
buffer.Append(stringToAppend);
buffer.Append(charToAppend);
// Assert
Assert.Equal(2 * PagedCharBuffer.PageSize + 1, buffer.Length);
Assert.Collection(buffer.Pages,
page => Assert.Equal(stringToAppend.ToCharArray(), page),
page => Assert.Equal(charToAppend, page[0]));
}
public void AppendWithCharArray_AppendsToMultiplePages()
{
// Arrange
var ch = 'e';
var length = PagedCharBuffer.PageSize * 2 + 3;
var charsToAppend = Enumerable.Repeat(ch, 2 * length).ToArray();
var expected = Enumerable.Repeat(ch, PagedCharBuffer.PageSize);
var buffer = new PagedCharBuffer(new CharArrayBufferSource());
// Act
buffer.Append(charsToAppend, 0, length);
// Assert
Assert.Equal(length, buffer.Length);
Assert.Collection(buffer.Pages,
page => Assert.Equal(expected, page),
page => Assert.Equal(expected, page),
page =>
{
Assert.Equal(ch, page[0]);
Assert.Equal(ch, page[1]);
Assert.Equal(ch, page[2]);
});
}
public PagedBufferedTextWriter(ArrayPool <char> pool, TextWriter inner)
{
_charBuffer = new PagedCharBuffer(new ArrayPoolBufferSource(pool));
_inner = inner;
}
