Feature : Add API Tests

.gitignore

@@ -365,7 +365,7 @@ FodyWeavers.xsd
 .DS_Store	
 
 # API Tests
-src/*.Tests/**/ApiApprovalTests*.received.txt	
+src/*.Tests/API/ApiApprovalTests.*.received.txt
 
 # JetBrains
 .idea/

src/DynamicData.Tests/API/ApiApprovalBase.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+using PublicApiGenerator;
+using VerifyXunit;
+
+namespace DynamicData.APITests
+{
+    /// <summary>
+    /// Api Approval Base.
+    /// </summary>
+    [ExcludeFromCodeCoverage]
+    [UsesVerify]
+    public abstract class ApiApprovalBase
+    {
+        /// <summary>
+        /// Check Approval.
+        /// </summary>
+        /// <param name="assembly">The assembly.</param>
+        /// <param name="filePath">The file path.</param>
+        /// <returns>A <see cref="Task"/> representing the result of the asynchronous operation.</returns>
+        protected static Task CheckApproval(Assembly assembly, [CallerFilePath] string? filePath = null)
+        {
+            if (filePath is null)
+            {
+                return Task.CompletedTask;
+            }
+
+            var generatorOptions = new ApiGeneratorOptions { AllowNamespacePrefixes = ["DynamicData"] };
+            var apiText = assembly.GeneratePublicApi(generatorOptions);
+            return Verifier.Verify(apiText, null, filePath)
+                .UniqueForRuntimeAndVersion()
+                .ScrubEmptyLines()
+                .ScrubLines(l =>
+                    l.StartsWith("[assembly: AssemblyVersion(", StringComparison.InvariantCulture) ||
+                    l.StartsWith("[assembly: AssemblyFileVersion(", StringComparison.InvariantCulture) ||
+                    l.StartsWith("[assembly: AssemblyInformationalVersion(", StringComparison.InvariantCulture) ||
+                    l.StartsWith("[assembly: System.Reflection.AssemblyMetadata(", StringComparison.InvariantCulture));
+        }
+    }
+}