public void TestPrefetchAsyncBatch()
{
var pageSize = 100;
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero, pageSize: pageSize);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromCache | LogSourceQueryMode.FetchForLater);
buffer.OnLogFileModified(_source.Object, LogSourceModification.Appended(0, 10));
var section1ToQuery = new LogSourceSection(2, 4);
buffer.GetEntries(section1ToQuery, destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "Because we didn't allow data to be retrieved on the calling thread");
var section2ToQuery = new LogSourceSection(7, 3);
buffer.GetEntries(section2ToQuery, destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "Because we didn't allow data to be retrieved on the calling thread");
_taskScheduler.RunOnce();
_source.Verify(x => x.GetEntries(new LogSourceSection(0, pageSize), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Once, "Because the buffer should avoid reading the same data for the same page multiple times in a row");
}
public void TestSkipSourceIfNotAllowed()
{
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromCache);
buffer.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(It.IsAny <IReadOnlyList <LogLineIndex> >(), It.IsAny <ILogBuffer>(), It.IsAny <int>(), It.IsAny <LogSourceQueryOptions>()),
Times.Never, "because we didn't allow the data to be retrieved from the source under any circumstances");
}
public void TestFetchFromSourceWhenNotAllowedFromCache()
{
var buffer = new PageBufferedLogSource(_taskScheduler, _source.Object, TimeSpan.Zero);
var destination = new LogBufferArray(4, new IColumnDescriptor[] { Core.Columns.Index, Core.Columns.RawContent });
var queryOptions = new LogSourceQueryOptions(LogSourceQueryMode.FromSource);
buffer.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions);
_source.Verify(x => x.GetEntries(new LogSourceSection(10, 4), destination, 0, queryOptions),
Times.Once);
}
