public async Task TestReadFromStream()
{
var options = new FileBufferOptions(100, 10);
await using var buffers = new FileBuffers(options);
using var memStream = new MemoryStream();
var data = new byte[150];
for (byte i = 0; i < data.Length; i++)
{
data[i] = i;
}
memStream.Write(data, 0, data.Length);
var id = new BufferId(Guid.NewGuid(), "*");
await using var buffer = await buffers.AddForMememoryStream(id, memStream).NoSync();
var page = UseAndReturn.That(await buffer.GetPageAsync(0).ConfigureAwait(false));
AssertEqual(1, page.Data[1]);
AssertEqual(100, page.Data.Length);
await page.DisposeAsync().NoSync();
AssertEqual(1, buffers.Pool.Count);
page = UseAndReturn.That(await buffer.GetPageAsync(0).ConfigureAwait(false));
AssertEqual(0L, page.Data.Number);
AssertEqual(1, buffer.NumberOfBufferedPages);
await page.DisposeAsync().NoSync();
}
public async Task TestPageCaching()
{
var options = new FileBufferOptions(10, 5);
await using var buffers = new FileBuffers(options);
var memStream = new MemoryStream();
var data = new byte[150];
for (byte i = 0; i < data.Length; i++)
{
data[i] = i;
}
memStream.Write(data, 0, data.Length);
var id = new BufferId(Guid.NewGuid(), "*");
await using var buffer = await buffers.AddForMememoryStream(id, memStream).NoSync();
await using var page1 = await buffer.GetPageAsync(0).NoSync();
await using var page2 = await buffer.GetPageAsync(1).NoSync();
await using var page3 = await buffer.GetPageAsync(2).NoSync();
await using var page4 = await buffer.GetPageAsync(3).NoSync();
await using (var page5 = await buffer.GetPageAsync(4).NoSync()) {
AssertEqual(0L, page1.Number);
AssertEqual(1L, page2.Number);
AssertEqual(2L, page3.Number);
AssertEqual(3L, page4.Number);
AssertEqual(4L, page5.Number);
AssertEqual(5, buffer.NumberOfBufferedPages);
await using var page6 = await buffer.GetPageAsync(5).ConfigureAwait(false);
AssertEqual(5L, page6.Number);
AssertEqual(6, buffer.NumberOfBufferedPages);
await page6.UnPin().NoSync();
}
AssertEqual(5, buffer.NumberOfBufferedPages);
}