Clearing code

Author: timatet

AlgorithmsLibrary/ArithmeticCodingAlgm/ArithmeticCodingAlgm.cs

@@ -48,7 +48,7 @@ public static IAlgmEncoded<string, IAlgmEncoded<int, Dictionary<char, int>>> Enc
         {
             List<Symbol> codes = GetSymbolsRanges(source);
             decimal HighRange = 1, LowRange = 0, h, l;
-            
+
             StringBuilder TheImmutablePart = new StringBuilder();
 
             foreach (char c in source)
@@ -98,8 +98,8 @@ private static void DiscardTheImmutablePart(ref StringBuilder theImmutablePart,
         {
             string lr = lowRange.ToString();
             string hr = highRange.ToString();
-            int i=0;
-            while (i<lr.Length && i<hr.Length && lr[i]==hr[i])
+            int i = 0;
+            while (i < lr.Length && i < hr.Length && lr[i] == hr[i])
             {
                 if (!((i == 0 && lr[i] == '0') || lr[i] == ','))
                 {
@@ -111,21 +111,21 @@ private static void DiscardTheImmutablePart(ref StringBuilder theImmutablePart,
             }
         }
 
-        private static void DiscardTheImmutablePart(ref decimal highRange, ref decimal lowRange, ref decimal code, ref int index, string encoded, 
+        private static void DiscardTheImmutablePart(ref decimal highRange, ref decimal lowRange, ref decimal code, ref int index, string encoded,
             ref bool thePreviousDigitIsZero, ref int CntOfZero)
         {
             string lr = lowRange.ToString();
             string hr = highRange.ToString();
             string c = code.ToString();
             int i = 0, encodedLength = encoded.Length;
-            while (i < lr.Length && i < hr.Length &&  i < c.Length && lr[i] == hr[i] && lr[i]==c[i])
+            while (i < lr.Length && i < hr.Length && i < c.Length && lr[i] == hr[i] && lr[i] == c[i])
             {
                 if (!((i == 0 && lr[i] == '0') || lr[i] == ','))
                 {
                     highRange *= 10; highRange -= (int)highRange % 10;
                     lowRange *= 10; lowRange -= (int)lowRange % 10;
-                    code = Convert.ToDecimal("0," + (index<encodedLength?encoded.Substring(index, Math.Min(28, encodedLength - index)):"0" ));
-                    index++;    
+                    code = Convert.ToDecimal("0," + (index < encodedLength ? encoded.Substring(index, Math.Min(28, encodedLength - index)) : "0"));
+                    index++;
                 }
                 i++;
             }

AlgorithmsLibrary/Extensions/StringBuilderExtensions.cs

@@ -21,7 +21,7 @@ public static string Substring(this StringBuilder @this, int startpos, int lengt
                 stringBuilder.Append(@this[i]);
             }
             return stringBuilder.ToString();
-                //@this.ToString().Substring(startpos, length);
+            //@this.ToString().Substring(startpos, length);
         }
 
         public static int IndexOf(this StringBuilder haystack, string needle)

AlgorithmsLibrary/LZ78Algm/LZ78Algm.cs

@@ -4,7 +4,6 @@
 using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
 
 namespace AlgorithmsLibrary
 {

AlgorithmsLibrary/LZ78Algm/LZ78CodeBlock.cs

@@ -10,7 +10,7 @@ public class LZ78CodeBlock : IEquatable<LZ78CodeBlock>
         public LZ78CodeBlock(int Position, char Char)
         {
             this.Position = Position;
-            this.Char = Char;   
+            this.Char = Char;
         }
 
         public override string ToString()

UnitTestProject/LZ78AlgmUnitTest.cs

@@ -1,15 +1,25 @@
 using AlgorithmsLibrary;
-using System;
+using AlgorithmsLibrary.CommonClasses;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using Xunit;
 
 namespace UnitTestProject
 {
     public class LZ78AlgmUnitTest
     {
+        [Fact]
+        public void EncodingEmptyString()
+        {
+            var result = LZ78Algm.Encode("");
+            var expected = new List<LZ78CodeBlock> { };
+
+            Assert.Equal(expected, result.GetAnswer());
+        }
+        [Fact]
+        public void DecodingEmptyString()
+        {
+            Assert.Throws<CodingException>(() => LZ78Algm.Decode(string.Empty));
+        }
         [Fact]
         public void EncodeStringWithRepeatsLongString()
         {
@@ -31,7 +41,7 @@ public void EncodeStringWithRepeatsLongString()
 
             Assert.Equal(expectedCodeBlocks, result.GetAnswer());
         }
-        
+
         [Fact]
         public void DecodedStringWithRepeatsLongString()
         {