public void Reads_created_by_metadata()
{
DataSet ds = DataSetGenerator.Generate(10);
var ms = new MemoryStream();
ParquetWriter.Write(ds, ms);
ms.Position = 0;
DataSet ds1 = ParquetReader.Read(ms);
Assert.StartsWith("Parquet.Net", ds1.Metadata.CreatedBy);
}
public void Read_from_negative_offset_fails()
{
DataSet ds = DataSetGenerator.Generate(15);
var wo = new WriterOptions {
RowGroupsSize = 5
};
var ro = new ReaderOptions {
Offset = -4, Count = 2
};
var ms = new MemoryStream();
ParquetWriter.Write(ds, ms, CompressionMethod.None, null, wo);
ms.Position = 0;
Assert.Throws <ParquetException>(() => ParquetReader.Read(ms, null, ro));
}
public void Read_from_offset_in_second_chunk()
{
DataSet ds = DataSetGenerator.Generate(15);
var wo = new WriterOptions {
RowGroupsSize = 5
};
var ro = new ReaderOptions {
Offset = 5, Count = 2
};
var ms = new MemoryStream();
ParquetWriter.Write(ds, ms, CompressionMethod.None, null, wo);
ms.Position = 0;
DataSet ds1 = ParquetReader.Read(ms, null, ro);
Assert.Equal(15, ds1.TotalRowCount);
Assert.Equal(2, ds1.RowCount);
Assert.Equal(5, ds1[0][0]);
Assert.Equal(6, ds1[1][0]);
}
