public void Should_Open_Reader_When_Mode_Is_Read()
{
//Arrange
_csvReader = Substitute.For <ICSVReader>();
_csvWriter = Substitute.For <ICSVWriter>();
_csvReaderWriter = new CSVReaderWriter(_csvReader, _csvWriter);
//Act
_csvReaderWriter.Open(FilePath, CSVReaderWriter.Mode.Read);
//Assert
_csvReader.Received().Open(FilePath);
_csvWriter.DidNotReceive().Open(FilePath);
}