public void AssignDCIdxTest()
{
// Arrange
Split split = new Split();
split.DisplayCols.Add(new C1DisplayColumn());
split.DisplayCols.Add(new C1DisplayColumn());
split.DisplayCols.Add(new C1DisplayColumn());
string expectedResult = "0 1 2";
// Act
split.AssignDCIdx();
string actualResult = $"{split.DisplayCols[0].Properties["DCIdx"]} {split.DisplayCols[1].Properties["DCIdx"]} {split.DisplayCols[2].Properties["DCIdx"]}";
//Assert
Assert.AreEqual(expectedResult, actualResult);
}