public void GetHeaderRow_ThrowsExcption_WhenNotHeaderRow()
{
// Arrange
var enrollmentRows = fixture.Create <List <string> >();
var headers = new List <string>();
var expectedMessage = "Fist row of CSV file must contain vaild headers.";
_csvServiceMock.Setup(s => s.GetAssumedHeaderRow(It.IsAny <List <string> >())).Returns(headers);
_csvServiceMock.Setup(s => s.IsHeaderRow(It.IsAny <List <string> >())).Returns(false);
// Act
// Assert
var exception = Assert.Throws <ArgumentException>(() => _sut.GetHeaderRow(enrollmentRows));
Assert.AreEqual(expectedMessage, exception.Message);
}