chore: add GlobalUsings.cs with project-wide using directives in algorithms tests

Algorithms.Tests/Compressors/BurrowsWheelerTransformTests.cs

@@ -1,6 +1,4 @@
 using Algorithms.DataCompression;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Compressors;
 

Algorithms.Tests/Compressors/HuffmanCompressorTests.cs

@@ -1,8 +1,5 @@
 using Algorithms.DataCompression;
 using Algorithms.Sorters.Comparison;
-using FluentAssertions;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Compressors;
 

Algorithms.Tests/Compressors/ShannonFanoCompressorTests.cs

@@ -1,7 +1,5 @@
 using Algorithms.DataCompression;
 using Algorithms.Knapsack;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Compressors;
 

Algorithms.Tests/Compressors/TranslatorTests.cs

@@ -1,6 +1,4 @@
-using System.Collections.Generic;
 using Algorithms.DataCompression;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Compressors;
 

Algorithms.Tests/Crypto/Digests/AsconDigestTests.cs

@@ -1,9 +1,5 @@
-using System;
-using System.Text;
 using Algorithms.Crypto.Digests;
 using Algorithms.Crypto.Exceptions;
-using FluentAssertions;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Crypto.Digests;
 

Algorithms.Tests/Crypto/Digests/Md2DigestTests.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Text;
-using Algorithms.Crypto.Digests;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Digests;
 
 namespace Algorithms.Tests.Crypto.Digesters;
 

Algorithms.Tests/Crypto/Exceptions/CryptoExceptionTests.cs

@@ -1,8 +1,4 @@
 using Algorithms.Crypto.Exceptions;
-using NUnit.Framework;
-using FluentAssertions;
-using System;
-
 
 namespace Algorithms.Tests.Crypto.Exceptions
 {

Algorithms.Tests/Crypto/Exceptions/DataLengthExceptionTests.cs

@@ -1,6 +1,3 @@
-using NUnit.Framework;
-using FluentAssertions;
-using System;
 using Algorithms.Crypto.Exceptions;
 
 namespace Algorithms.Tests.Crypto.Exceptions

Algorithms.Tests/Crypto/Exceptions/OutputLengthExceptionTests.cs

@@ -1,6 +1,3 @@
-using NUnit.Framework;
-using FluentAssertions;
-using System;
 using Algorithms.Crypto.Exceptions;
 
 namespace Algorithms.Tests.Crypto.Exceptions

Algorithms.Tests/Crypto/Paddings/Iso10126D2PaddingTests.cs

@@ -1,7 +1,4 @@
-using System;
-using Algorithms.Crypto.Paddings;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Paddings;
 
 namespace Algorithms.Tests.Crypto.Paddings;
 

Algorithms.Tests/Crypto/Paddings/Iso7816D4PaddingTests.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Linq;
-using Algorithms.Crypto.Paddings;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Paddings;
 
 namespace Algorithms.Tests.Crypto.Paddings;
 

Algorithms.Tests/Crypto/Paddings/Pkcs7PaddingTests.cs

@@ -1,7 +1,4 @@
-using System;
-using Algorithms.Crypto.Paddings;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Paddings;
 
 namespace Algorithms.Tests.Crypto.Paddings;
 

Algorithms.Tests/Crypto/Paddings/TbcPaddingTests.cs

@@ -1,7 +1,4 @@
-using System;
-using Algorithms.Crypto.Paddings;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Paddings;
 
 namespace Algorithms.Tests.Crypto.Paddings;
 
@@ -18,7 +15,7 @@ public void AddPadding_WhenInputOffsetIsZero_ShouldPadWithLastBit()
         var result = padding.AddPadding(input, inputOffset);
 
         result.Should().Be(4);
-        input.Should().BeEquivalentTo(new byte[]{0xff, 0xff, 0xff, 0xff});
+        input.Should().BeEquivalentTo(new byte[] { 0xff, 0xff, 0xff, 0xff });
     }
 
     [Test]

Algorithms.Tests/Crypto/Paddings/X932PaddingTests.cs

@@ -1,7 +1,4 @@
-using System;
-using Algorithms.Crypto.Paddings;
-using FluentAssertions;
-using NUnit.Framework;
+using Algorithms.Crypto.Paddings;
 
 namespace Algorithms.Tests.Crypto.Paddings;
 

Algorithms.Tests/Crypto/Utils/ByteEncodingUtils.cs

@@ -1,6 +1,3 @@
-using NUnit.Framework;
-using FluentAssertions;
-using System;
 using Algorithms.Crypto.Utils;
 
 namespace Algorithms.Tests.Crypto.Utils

Algorithms.Tests/Crypto/Utils/LongUtilsTests.cs

@@ -1,5 +1,3 @@
-using NUnit.Framework;
-using FluentAssertions;
 using Algorithms.Crypto.Utils;
 
 namespace Algorithms.Tests.Crypto.Utils

Algorithms.Tests/Crypto/Utils/ValidationUtilsTests.cs

@@ -1,6 +1,3 @@
-using NUnit.Framework;
-using FluentAssertions;
-using System;
 using Algorithms.Crypto.Utils;
 using Algorithms.Crypto.Exceptions;
 

Algorithms.Tests/Encoders/AutokeyEncoderTests.cs

@@ -1,7 +1,4 @@
-using System;
 using Algorithms.Encoders;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Encoders
 {

Algorithms.Tests/Encoders/BlowfishEncoderTests.cs

@@ -1,6 +1,4 @@
 using Algorithms.Encoders;
-using FluentAssertions;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Encoders/CaesarEncoderTests.cs

@@ -1,6 +1,4 @@
 using Algorithms.Encoders;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Encoders/FeistelCipherTest.cs

@@ -1,7 +1,4 @@
 using Algorithms.Encoders;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
-using System;
 
 namespace Algorithms.Tests.Encoders;
 
@@ -26,10 +23,10 @@ public static void DecodedStringIsTheSame([Random(100)] uint key)
         Assert.That(decoded, Is.EqualTo(message));
     }
 
-    [TestCase("00001111",                           (uint)0x12345678)]
-    [TestCase("00001111222233334444555566667",      (uint)0x12345678)]
-    [TestCase("000011112222333344445555666677",     (uint)0x12345678)]
-    [TestCase("0000111122223333444455556666777",    (uint)0x12345678)]
+    [TestCase("00001111", (uint)0x12345678)]
+    [TestCase("00001111222233334444555566667", (uint)0x12345678)]
+    [TestCase("000011112222333344445555666677", (uint)0x12345678)]
+    [TestCase("0000111122223333444455556666777", (uint)0x12345678)]
     // The plain text will be padded to fill the size of block (16 bytes), so the encoded message should be aligned with the rule
     // (text.Length % 16 == 0)
     public static void TestEncodedMessageSize(string testCase, uint key)

Algorithms.Tests/Encoders/HillEnconderTests.cs

@@ -1,6 +1,4 @@
 using Algorithms.Encoders;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Encoders/NysiisEncoderTests.cs

@@ -1,7 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
 using Algorithms.Encoders;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Encoders/SoundexEncoderTest.cs

@@ -1,7 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
 using Algorithms.Encoders;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Encoders/VigenereEncoderTests.cs

@@ -1,7 +1,4 @@
-using System;
 using Algorithms.Encoders;
-using NUnit.Framework;
-using NUnit.Framework.Internal;
 
 namespace Algorithms.Tests.Encoders;
 

Algorithms.Tests/Financial/PresentValueTests.cs

@@ -1,28 +1,23 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using Algorithms.Financial;
-using FluentAssertions;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Financial;
 
 public static class PresentValueTests
 {
-    [TestCase(0.13,new[] { 10.0, 20.70, -293.0, 297.0 },4.69)]
-    [TestCase(0.07,new[] { -109129.39, 30923.23, 15098.93, 29734.0, 39.0 }, -42739.63)]
+    [TestCase(0.13, new[] { 10.0, 20.70, -293.0, 297.0 }, 4.69)]
+    [TestCase(0.07, new[] { -109129.39, 30923.23, 15098.93, 29734.0, 39.0 }, -42739.63)]
     [TestCase(0.07, new[] { 109129.39, 30923.23, 15098.93, 29734.0, 39.0 }, 175519.15)]
     [TestCase(0.0, new[] { 109129.39, 30923.23, 15098.93, 29734.0, 39.0 }, 184924.55)]
 
-    public static void Present_Value_General_Tests(double discountRate,double[] cashFlow ,double expected)
+    public static void Present_Value_General_Tests(double discountRate, double[] cashFlow, double expected)
     =>
         PresentValue.Calculate(discountRate, cashFlow.ToList())
            .Should()
            .Be(expected);
 
 
     [TestCase(-1.0, new[] { 10.0, 20.70, -293.0, 297.0 })]
-    [TestCase(1.0,new double[] {})]
+    [TestCase(1.0, new double[] { })]
 
     public static void Present_Value_Exception_Tests(double discountRate, double[] cashFlow)
     => Assert.Throws<ArgumentException>(() => PresentValue.Calculate(discountRate, cashFlow.ToList()));

Algorithms.Tests/GlobalUsings.cs

@@ -0,0 +1,21 @@
+// -----------------------------------------------------------------------------
+// Global using directives for the C-Sharp solution.
+// These namespaces are imported globally so they don’t need to be repeatedly declared
+// in individual files, improving readability and reducing boilerplate.
+//
+// Guidelines:
+// - Keep only the most commonly used namespaces here.
+// - Add project-specific namespaces (e.g., Utilities.Extensions) only if they are
+//   required across the majority of files in the project.
+// - Avoid placing rarely used namespaces here to maintain clarity.
+// -----------------------------------------------------------------------------
+
+global using System;                        // Core base classes and fundamental types
+global using System.Collections.Generic;    // Generic collection types (List, Dictionary, etc.)
+global using System.Linq;                   // LINQ query operators for collections
+global using System.Numerics;               // Numeric types such as BigInteger and Complex
+global using System.Text;                   // Text encoding, StringBuilder, etc.
+global using Utilities.Extensions;          // Common extension methods used across the solution
+global using NUnit.Framework;               // Testing framework providing attributes and assertions for test cases
+global using NUnit.Framework.Internal;      // Internal NUnit infrastructure (test context, utilities) — generally used for advanced or framework-level test control
+global using FluentAssertions;              // Assertion library for more readable and expressive unit tests

Algorithms.Tests/Graph/BellmanFordTests.cs

@@ -1,9 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.Graph;
-using NUnit.Framework;
-using FluentAssertions;
-using System.Collections.Generic;
-using System;
 
 namespace Algorithms.Tests.Graph;
 

Algorithms.Tests/Graph/BreadthFirstSearchTests.cs

@@ -1,7 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.Graph;
-using NUnit.Framework;
-using System.Collections.Generic;
 
 namespace Algorithms.Tests.Graph;
 

Algorithms.Tests/Graph/BreadthFirstTreeTraversalTests.cs

@@ -1,6 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.BinarySearchTree;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Graph;
 

Algorithms.Tests/Graph/DepthFirstSearchTests.cs

@@ -1,7 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.Graph;
-using NUnit.Framework;
-using System.Collections.Generic;
 
 namespace Algorithms.Tests.Graph;
 

Algorithms.Tests/Graph/Dijkstra/DijkstraTests.cs

@@ -1,8 +1,5 @@
-using System;
 using Algorithms.Graph.Dijkstra;
 using DataStructures.Graph;
-using FluentAssertions;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Graph.Dijkstra;
 

Algorithms.Tests/Graph/FloydWarshallTests.cs

@@ -1,7 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.Graph;
-using NUnit.Framework;
-using FluentAssertions;
 
 namespace Algorithms.Tests.Graph;
 

Algorithms.Tests/Graph/KosarajuTests.cs

@@ -1,9 +1,5 @@
 using Algorithms.Graph;
 using DataStructures.Graph;
-using NUnit.Framework;
-using FluentAssertions;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace Algorithms.Tests.Graph;
 
@@ -34,7 +30,7 @@ public void GetRepresentativesTest()
         graph.AddEdge(vertex5, vertex6, 1);
 
         // Run the agorithm and obtain the representative vertex of the SCC to which each vertex belongs.
-        Dictionary<Vertex<int>,Vertex<int>> result = Kosaraju<int>.GetRepresentatives(graph);
+        Dictionary<Vertex<int>, Vertex<int>> result = Kosaraju<int>.GetRepresentatives(graph);
 
         // Check every Vertex belongs to a SCC
         result.Should().ContainKey(vertex1);

Algorithms.Tests/Graph/MinimumSpanningTree/KruskalTests.cs

@@ -1,9 +1,4 @@
 using Algorithms.Graph.MinimumSpanningTree;
-using FluentAssertions;
-using NUnit.Framework;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace Algorithms.Tests.Graph.MinimumSpanningTree;
 

Algorithms.Tests/Graph/MinimumSpanningTree/PrimMatrixTests.cs

@@ -1,8 +1,4 @@
 using Algorithms.Graph.MinimumSpanningTree;
-using FluentAssertions;
-using NUnit.Framework;
-using System;
-using System.Linq;
 
 namespace Algorithms.Tests.Graph.MinimumSpanningTree;
 

Algorithms.Tests/Helpers/IntComparer.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 namespace Algorithms.Tests.Helpers;
 
 internal class IntComparer : IComparer<int>

Algorithms.Tests/Helpers/RandomHelper.cs

@@ -1,5 +1,3 @@
-using NUnit.Framework;
-
 namespace Algorithms.Tests.Helpers;
 
 internal static class RandomHelper

Algorithms.Tests/Knapsack/BranchAndBoundKnapsackSolverTests.cs

@@ -1,7 +1,4 @@
-using System;
 using Algorithms.Knapsack;
-using NUnit.Framework;
-using FluentAssertions;
 
 namespace Algorithms.Tests.Knapsack;
 

Algorithms.Tests/Knapsack/DynamicProgrammingKnapsackSolverTests.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Linq;
 using Algorithms.Knapsack;
-using NUnit.Framework;
 
 namespace Algorithms.Tests.Knapsack;