feat: Blazor tests added

WotBlitzStatisticsPro.Blazor.Tests/MockNavigationManager.cs

@@ -0,0 +1,30 @@
+using Microsoft.AspNetCore.Components;
+
+namespace WotBlitzStatisticsPro.Blazor.Tests
+{
+    public class MockNavigationManager: NavigationManager
+    {
+        public int NavigationCount { get; private set; } = 0;
+
+        public MockNavigationManager()
+        {
+            Initialize("https://unit-test.example/", "https://unit-test.example/bla-bla");
+        }
+
+
+        protected override void NavigateToCore(string uri, bool forceLoad)
+        {
+            if (uri == "/")
+            {
+                Uri = BaseUri;
+            }
+            else if (uri.StartsWith("/") && uri.Length > 1)
+            {
+                Uri = $"{BaseUri}{uri.Substring(1)}";
+            }
+            NotifyLocationChanged(false);
+
+            NavigationCount++;
+        }
+    }
+}