protected async Task RunTestAsync(Func <CsvAsyncInputBase> sutCreator, string filePath, bool ignoreUTF8ByteOrderMark)
{
(byte[] fileData, int originalLength) = GetExpectedCsvData(filePath, ignoreUTF8ByteOrderMark);
var expected = TokenizeCsvFileUsingCursively(fileData, fileData.Length, (byte)',');
// run without progress
{
var sut = sutCreator();
var inputVisitor = new StringBufferingVisitor();
await sut.ProcessAsync(inputVisitor).ConfigureAwait(false);
Assert.Equal(expected, inputVisitor.Records);
await Assert.ThrowsAsync <InvalidOperationException>(() => sut.ProcessAsync(null).AsTask());
}
// run with progress
{
var sut = sutCreator();
var inputVisitor = new StringBufferingVisitor();
var readSoFar = new List <int>();
var progress = new ImmediateProgress <int>(readSoFar.Add);
await sut.ProcessAsync(inputVisitor, progress).ConfigureAwait(false);
Assert.Equal(expected, inputVisitor.Records);
Assert.Equal(originalLength, readSoFar.Sum());
Assert.Equal(0, readSoFar.Last());
await Assert.ThrowsAsync <InvalidOperationException>(() => sut.ProcessAsync(null).AsTask());
}
}
public void EachReportedProgressValueInvokesTheAction()
{
int value = 0;
IProgress <int> progress = new ImmediateProgress <int>(v => value = v);
Assert.Equal(0, value);
progress.Report(240);
Assert.Equal(240, value);
progress.Report(-240);
Assert.Equal(-240, value);
}
public async Task CallbacksAreInvokedSynchronously_NeitherThroughSynchronizationContextNorOnTheThreadPool()
{
Thread?thread = null;
IProgress <object?> progress = new ImmediateProgress <object?>(value => thread = Thread.CurrentThread);
Assert.Null(thread);
progress.Report(null);
Assert.NotNull(thread);
Assert.Same(Thread.CurrentThread, thread);
TaskCompletionSource <int> tcs = new();
progress = new Progress <object?>(value => tcs.SetResult(Thread.CurrentThread.ManagedThreadId));
progress.Report(null);
int threadId = await tcs.Task.ConfigureAwait(false);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, threadId);
}
