Created tests for the core module

tests/HopFrame.Core.Tests/Services/DefaultAuthHandlerTests.cs

@@ -0,0 +1,41 @@
+using HopFrame.Core.Services.Implementations;
+
+namespace HopFrame.Core.Tests.Services;
+
+public class DefaultAuthHandlerTests {
+    [Fact]
+    public async Task IsAuthenticatedAsync_ReturnsTrue() {
+        // Arrange
+        var authHandler = new DefaultAuthHandler();
+
+        // Act
+        var result = await authHandler.IsAuthenticatedAsync(null);
+
+        // Assert
+        Assert.True(result);
+    }
+    
+    [Fact]
+    public async Task IsAuthenticatedAsync_WithPolicy_ReturnsTrue() {
+        // Arrange
+        var authHandler = new DefaultAuthHandler();
+
+        // Act
+        var result = await authHandler.IsAuthenticatedAsync("TestPolicy");
+
+        // Assert
+        Assert.True(result);
+    }
+
+    [Fact]
+    public async Task GetCurrentUserDisplayNameAsync_ReturnsEmptyString() {
+        // Arrange
+        var authHandler = new DefaultAuthHandler();
+
+        // Act
+        var result = await authHandler.GetCurrentUserDisplayNameAsync();
+
+        // Assert
+        Assert.Equal(string.Empty, result);
+    }
+}