Minor cleanup to (mostly) unit tests.

IotaCSharpApi/Api/Utils/Checksum.cs

@@ -13,7 +13,7 @@ public static class Checksum
         /// <param name="address">An address without checksum</param>
         /// <returns>The address with the appended checksum </returns>
         /// <exception cref="InvalidAddressException">is thrown when an invalid address is provided</exception>
-        public static string AddChecksum(string address)
+        public static string AddChecksum(this string address)
         {
             InputValidator.CheckAddress(address);
             string addressWithChecksum = address;

IotaCSharpApi/Api/Utils/IotaUnitConverter.cs

@@ -16,14 +16,14 @@ public class IotaUnitConverter
         /// <returns>the specified amount in the target unit</returns>
         public static double ConvertUnits(long amount, IotaUnits fromUnit, IotaUnits toUnit)
         {
-            long amountInSource = (long) (amount*Math.Pow(10, (int) fromUnit));
+            long amountInSource = (long)(amount * Math.Pow(10, (int)fromUnit));
             return ConvertUnits(amountInSource, toUnit);
         }
 
         private static double ConvertUnits(long amount, IotaUnits toUnit)
         {
-            int base10NormalizationExponent = (int) toUnit;
-            return (amount/Math.Pow(10, base10NormalizationExponent));
+            int base10NormalizationExponent = (int)toUnit;
+            return amount / Math.Pow(10, base10NormalizationExponent);
         }
 
         /// <summary>
@@ -33,7 +33,7 @@ private static double ConvertUnits(long amount, IotaUnits toUnit)
         /// <returns>the optimal IotaUnit</returns>
         public static IotaUnits FindOptimalIotaUnitToDisplay(long amount)
         {
-            int length = (amount).ToString().Length;
+            int length = amount.ToString().Length;
 
             if (amount < 0)
             {

IotaCSharpApiUnitTests/Api/IotaApiTests.cs

@@ -4,7 +4,6 @@
 using Iota.Lib.CSharp.Api.Core;
 using Iota.Lib.CSharp.Api.Exception;
 using Iota.Lib.CSharp.Api.Model;
-using Iota.Lib.CSharp.Api.Utils;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
 namespace Iota.Lib.CSharpTests.Api

IotaCSharpApiUnitTests/Api/IotaCoreApiTest.cs

@@ -2,7 +2,6 @@
 using Iota.Lib.CSharp.Api;
 using Iota.Lib.CSharp.Api.Core;
 using Iota.Lib.CSharp.Api.Exception;
-using Iota.Lib.CSharp.Api.Utils;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
 namespace Iota.Lib.CSharpTests.Api

IotaCSharpApiUnitTests/Api/Utils/ChecksumTest.cs

@@ -15,19 +15,19 @@ public class ChecksumTest
         [TestMethod]
         public void shouldAddChecksum()
         {
-            Assert.AreEqual(Checksum.AddChecksum(TEST_ADDRESS_WITHOUT_CHECKSUM), TEST_ADDRESS_WITH_CHECKSUM);
+            Assert.AreEqual(TEST_ADDRESS_WITHOUT_CHECKSUM.AddChecksum(), TEST_ADDRESS_WITH_CHECKSUM);
         }
 
         [TestMethod]
         public void shouldRemoveChecksum()
         {
-            Assert.AreEqual(Checksum.RemoveChecksum(TEST_ADDRESS_WITH_CHECKSUM), TEST_ADDRESS_WITHOUT_CHECKSUM);
+            Assert.AreEqual(TEST_ADDRESS_WITH_CHECKSUM.RemoveChecksum(), TEST_ADDRESS_WITHOUT_CHECKSUM);
         }
 
         [TestMethod]
         public void shouldIsValidChecksum()
         {
-            Assert.AreEqual(Checksum.IsValidChecksum(TEST_ADDRESS_WITH_CHECKSUM), true);
+            Assert.AreEqual(TEST_ADDRESS_WITH_CHECKSUM.IsValidChecksum(), true);
         }
     }
 }

IotaCSharpApiUnitTests/Api/Utils/InputValidatorTests.cs

@@ -68,9 +68,12 @@ public void shouldIsArrayOfHashes()
         [TestMethod]
         public void shouldIsTransfersCollectionCorrect()
         {
-            List<Transfer> transfers = new List<Transfer>();
-            transfers.Add(new Transfer(TEST_ADDRESS_WITH_CHECKSUM, 0, TEST_MESSAGE, TEST_TAG));
-            transfers.Add(new Transfer(TEST_ADDRESS_WITH_CHECKSUM, 0, TEST_MESSAGE, TEST_TAG));
+            List<Transfer> transfers = new List<Transfer>
+            {
+                new Transfer(TEST_ADDRESS_WITH_CHECKSUM, 0, TEST_MESSAGE, TEST_TAG),
+                new Transfer(TEST_ADDRESS_WITH_CHECKSUM, 0, TEST_MESSAGE, TEST_TAG)
+            };
+
             Assert.AreEqual(InputValidator.IsTransfersCollectionValid(transfers), true);
         }
     }

IotaCSharpApiUnitTests/Api/Utils/TrytesConverterTest.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Security.Cryptography;
 using Iota.Lib.CSharp.Api.Utils;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
@@ -29,7 +30,7 @@ public void shouldConvertBackAndForth()
             Assert.AreEqual(str, back);
         }
 
-        private static Random random = new Random();
+        private static Random random = new Random(DateTime.Now.Millisecond);
 
         public static string RandomString(int length)
         {