public void Write_writes_columns_as_tab_separated_line()
{
//arrange
const string column1 = "column1";
const string column2 = "column2";
// act
_csvWriter.Write(column1, column2);
_streamWriter.Verify(s => s.WriteLine(column1 + '\t' + column2));
}
public void Write(params string[] columns)
{
_csvWriter.Write(columns);
}