public void ValidateRowLengths_ThrowsException_WhenRowNotSameLengthAsHeaders()
{
// Arrange
var headerRowCount = 3;
var rows = new List <string>
{
"1,2,3",
"1,2"
};
var expectedErrorMessage = "Header row cannot be different length than other rows. Rows which require fixing (with header row being 0): 2";
// Act
// Assert
var exception = Assert.Throws <ArgumentException>(() => _sut.ValidateRowLengths(rows, headerRowCount));
Assert.AreEqual(expectedErrorMessage, exception.Message);
}