Add test that verifies overriding by using ConfigureTelemetry (#1787)

test/Polly.Extensions.Tests/Issues/IssuesTests.OverrideLoggerFactory_1783.cs

@@ -0,0 +1,36 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Logging;
+using Polly.Registry;
+
+namespace Polly.Extensions.Tests.Issues;
+
+public partial class IssuesTests
+{
+    [Fact]
+    public void OverrideLoggerFactory_ByExplicitConfigureTelemetryCall_1783()
+    {
+        // Arrange
+        using var loggerFactory1 = new FakeLoggerFactory();
+        using var loggerFactory2 = new FakeLoggerFactory();
+        var services = new ServiceCollection();
+        services.TryAddSingleton<ILoggerFactory>(loggerFactory1);
+
+        // Act
+        services.AddResiliencePipeline("dummy", builder =>
+        {
+            builder.AddTimeout(TimeSpan.FromSeconds(1));
+
+            // This call should override the base factory
+            builder.ConfigureTelemetry(loggerFactory2);
+        });
+
+        // Assert
+        var provider = services.BuildServiceProvider().GetRequiredService<ResiliencePipelineProvider<string>>();
+
+        provider.GetPipeline("dummy").Execute(() => { });
+
+        loggerFactory1.FakeLogger.GetRecords().Should().BeEmpty();
+        loggerFactory2.FakeLogger.GetRecords().Should().NotBeEmpty();
+    }
+}