public void ShouldFailForUnreadableStream()
{
using (var stream = new TweakableStream(Stream.Null))
{
stream.SetCanRead(false);
Assert.Throws <ArgumentException>("csvStream", () => CsvAsyncInput.ForStream(stream));
}
}
public void FluentConfigurationShouldValidateInputs()
{
var sut = CsvAsyncInput.ForStream(null);
Assert.Throws <ArgumentException>("delimiter", () => sut.WithDelimiter((byte)'"'));
Assert.Throws <ArgumentException>("delimiter", () => sut.WithDelimiter((byte)'\r'));
Assert.Throws <ArgumentException>("delimiter", () => sut.WithDelimiter((byte)'\n'));
Assert.Throws <ArgumentOutOfRangeException>("minReadBufferByteCount", () => sut.WithMinReadBufferByteCount(-1));
Assert.Throws <ArgumentOutOfRangeException>("minReadBufferByteCount", () => sut.WithMinReadBufferByteCount(0));
}
public async Task <long> CountRowsUsingCursivelyAsyncFileStreamInput(CsvFile csvFile)
{
var visitor = new RowCountingVisitor();
using (var stream = new FileStream(csvFile.FullPath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.Asynchronous | FileOptions.SequentialScan))
{
await CsvAsyncInput.ForStream(stream).ProcessAsync(visitor);
}
return(visitor.RowCount);
}
public async Task FluentConfigurationShouldFailAfterProcessing()
{
var sut = CsvAsyncInput.ForStream(null);
await sut.ProcessAsync(null).ConfigureAwait(true);
// shouldn't be able to further configure a Stream input after processing starts...
Assert.Throws <InvalidOperationException>(() => sut.WithDelimiter((byte)'\t'));
Assert.Throws <InvalidOperationException>(() => sut.WithIgnoreUTF8ByteOrderMark(false));
Assert.Throws <InvalidOperationException>(() => sut.WithMinReadBufferByteCount(5));
Assert.Throws <InvalidOperationException>(() => sut.WithReadBufferPool(null));
}
public async Task IgnoreUTF8BOM(string filePath, int chunkLength)
{
// arrange
filePath = Path.Combine(TestCsvFilesFolderPath, filePath);
using (var stream = File.OpenRead(filePath))
{
// act, assert
await RunTestAsync(CreateSut, filePath, true).ConfigureAwait(true);
CsvAsyncInputBase CreateSut()
{
stream.Position = 0;
return(CsvAsyncInput.ForStream(stream)
.WithMinReadBufferByteCount(chunkLength)
.WithIgnoreUTF8ByteOrderMark(true));
}
}
}
