| using System; | 
 | using System.Text; | 
 | using System.Collections.Generic; | 
 | using System.Linq; | 
 | using Microsoft.VisualStudio.TestTools.UnitTesting; | 
 | using OfficeOpenXml.Utils; | 
 |  | 
 | namespace EPPlusTest.Utils | 
 | { | 
 |     [TestClass] | 
 |     public class SqRefUtilityTests | 
 |     { | 
 |         [TestMethod, ExpectedException(typeof(ArgumentNullException))] | 
 |         public void SqRefUtility_ToSqRefAddress_ShouldThrowIfAddressIsNullOrEmpty() | 
 |         { | 
 |             SqRefUtility.ToSqRefAddress(null); | 
 |         } | 
 |  | 
 |         [TestMethod] | 
 |         public void SqRefUtility_ToSqRefAddress_ShouldRemoveCommas() | 
 |         { | 
 |             // Arrange | 
 |             var address = "A1, A2:A3"; | 
 |  | 
 |             // Act | 
 |             var result = SqRefUtility.ToSqRefAddress(address); | 
 |  | 
 |             // Assert | 
 |             Assert.AreEqual("A1 A2:A3", result); | 
 |         } | 
 |  | 
 |  | 
 |         [TestMethod] | 
 |         public void SqRefUtility_ToSqRefAddress_ShouldRemoveCommasAndInsertSpaceIfNecesary() | 
 |         { | 
 |             // Arrange | 
 |             var address = "A1,A2:A3"; | 
 |  | 
 |             // Act | 
 |             var result = SqRefUtility.ToSqRefAddress(address); | 
 |  | 
 |             // Assert | 
 |             Assert.AreEqual("A1 A2:A3", result); | 
 |         } | 
 |  | 
 |         [TestMethod] | 
 |         public void SqRefUtility_ToSqRefAddress_ShouldRemoveMultipleSpaces() | 
 |         { | 
 |             // Arrange | 
 |             var address = "A1,        A2:A3"; | 
 |  | 
 |             // Act | 
 |             var result = SqRefUtility.ToSqRefAddress(address); | 
 |  | 
 |             // Assert | 
 |             Assert.AreEqual("A1 A2:A3", result); | 
 |         } | 
 |  | 
 |         [TestMethod] | 
 |         public void SqRefUtility_FromSqRefAddress_ShouldReplaceSpaceWithComma() | 
 |         { | 
 |             // Arrange | 
 |             var address = "A1 A2"; | 
 |  | 
 |             // Act | 
 |             var result = SqRefUtility.FromSqRefAddress(address); | 
 |  | 
 |             // Assert | 
 |             Assert.AreEqual("A1,A2", result); | 
 |         } | 
 |     } | 
 | } |