[REFACTOR] [Hacker Rank] Interview Preparation Kit: Arrays: Left Rotation. Load test case data from JSON.

JSON load as Resource: https://khalidabuhakmeh.com/how-to-use-embedded-resources-in-dotnet

Author: Gonzalo Diaz

algorithm_exercises_csharp_test/Resources/hackerrank/interview_preparation_kit/arrays/ctci_array_left_rotation.testcases.json

@@ -0,0 +1,7 @@
+[
+    {"input": [1, 2, 3, 4, 5], "expected": [2, 3, 4, 5, 1]},
+    {"input": [2, 3, 4, 5, 1], "expected": [3, 4, 5, 1, 2]},
+    {"input": [3, 4, 5, 1, 2], "expected": [4, 5, 1, 2, 3]},
+    {"input": [4, 5, 1, 2, 3], "expected": [5, 1, 2, 3, 4]},
+    {"input": [5, 1, 2, 3, 4], "expected": [1, 2, 3, 4, 5]}
+]

algorithm_exercises_csharp_test/algorithm_exercises_csharp_test.csproj

@@ -54,4 +54,7 @@
     ReportTypes="TextSummary;Html"/>
   </Target>
 
+  <ItemGroup>
+    <EmbeddedResource Include="Resources/hackerrank/interview_preparation_kit/arrays/ctci_array_left_rotation.testcases.json" />
+  </ItemGroup>
 </Project>

algorithm_exercises_csharp_test/src/hackerrank/interview_preparation_kit/arrays/ArraysLeftRotation.Test.cs

@@ -1,36 +1,49 @@
 namespace algorithm_exercises_csharp.hackerrank.interview_preparation_kit;
 
+using System.Reflection;
+using System.Text;
+using System.Text.Json;
+using Newtonsoft.Json;
+
 [TestClass]
 public class ArraysLeftRotationTest
 {
   public class ArraysLeftRotationTestCase
   {
-    public List<int> input = []; public List<int> expected = [];
+    public List<Int32> input = []; public List<Int32> expected = [];
   }
 
   public class ArraysLeftRotationsTestCase
   {
     public List<int> input = []; public int d; public List<int> expected = [];
   }
 
-  private static readonly ArraysLeftRotationTestCase[] tests = [
-    new() { input = [1, 2, 3, 4, 5], expected = [2, 3, 4, 5, 1] },
-    new() { input = [2, 3, 4, 5, 1], expected = [3, 4, 5, 1, 2] },
-    new() { input = [3, 4, 5, 1, 2], expected = [4, 5, 1, 2, 3] },
-    new() { input = [4, 5, 1, 2, 3], expected = [5, 1, 2, 3, 4] },
-    new() { input = [5, 1, 2, 3, 4], expected = [1, 2, 3, 4, 5] }
-  ];
+  private static List<ArraysLeftRotationTestCase> testCases = [];
 
   private static readonly ArraysLeftRotationsTestCase[] testRotationsCases = [
     new() { input = [1, 2, 3, 4, 5], d = 4, expected = [5, 1, 2, 3, 4] }
   ];
 
+  [TestInitialize]
+  public void testInitialize()
+  {
+    var info = Assembly.GetExecutingAssembly().GetName();
+    var name = info.Name;
+    using var stream = Assembly
+        .GetExecutingAssembly()
+        .GetManifestResourceStream($"{name}.Resources.hackerrank.interview_preparation_kit.arrays.ctci_array_left_rotation.testcases.json")!;
+
+    using var streamReader = new StreamReader(stream, Encoding.UTF8);
+
+    testCases = JsonConvert.DeserializeObject<List<ArraysLeftRotationTestCase>>(streamReader.ReadToEnd()) ?? [];
+  }
+
   [TestMethod]
   public void testRotLeftOne()
   {
     List<int> result;
 
-    foreach (ArraysLeftRotationTestCase test in tests)
+    foreach (ArraysLeftRotationTestCase test in testCases)
     {
       result = ArraysLeftRotation.rotLeftOne(test.input);
       CollectionAssert.AreEquivalent(test.expected, result);