Tests of crack calculator were added

StructureHelperLogics/NdmCalculations/Cracking/IUserCrackInputData.cs

@@ -0,0 +1,14 @@
+using StructureHelperCommon.Models.Calculators;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public interface IUserCrackInputData : IInputData
+    {
+        double LengthBetweenCracks { get; set; }
+        bool SetLengthBetweenCracks { get; set; }
+        bool SetSofteningFactor { get; set; }
+        double SofteningFactor { get; set; }
+        double UltimateLongCrackWidth { get; set; }
+        double UltimateShortCrackWidth { get; set; }
+    }
+}