A:初版

test/NetClient.Test/Tests/NetClientDiTests.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using NetClient.Abstractions;
+using NetClient.DependencyInjection;
+using NetClient.Test.TestDoubles;
+
+namespace NetClient.Test.Tests;
+
+[TestClass]
+public class NetClientDiTests
+{
+    [TestMethod]
+    public async Task AddNetClient_TypedClient_Applies_Options_And_Handlers()
+    {
+        var services = new ServiceCollection();
+        services.AddSingleton<IAccessTokenProvider>(new StaticTokenProvider("token-123"));
+
+        TestHttpMessageHandler? capturedHandler = null;
+        var builder = services.AddNetClient(opt =>
+        {
+            opt.BaseAddress = new Uri("https://api.test");
+            opt.UseBearerToken = true;
+            opt.IncludeCorrelationId = true;
+        });
+
+        builder.ConfigurePrimaryHttpMessageHandler(() =>
+        {
+            capturedHandler = new TestHttpMessageHandler(req =>
+            {
+                // BaseAddress + Path combined
+                StringAssert.StartsWith(req.RequestUri!.AbsoluteUri, "https://api.test");
+                // Correlation header present
+                Assert.IsTrue(req.Headers.Contains("X-Correlation-Id"));
+                // Authorization applied
+                Assert.AreEqual("Bearer", req.Headers.Authorization!.Scheme);
+                Assert.AreEqual("token-123", req.Headers.Authorization!.Parameter);
+                return Task.FromResult(TestHttpMessageHandler.Text(HttpStatusCode.OK, "ok"));
+            });
+            return capturedHandler;
+        });
+
+        var sp = services.BuildServiceProvider();
+        var client = sp.GetRequiredService<IHttpClient>();
+        var result = await client.GetStringAsync("/ping");
+
+        Assert.AreEqual("ok", result);
+        Assert.IsNotNull(capturedHandler);
+        Assert.AreEqual(1, capturedHandler!.Calls);
+    }
+}
+