test: 增加单元测试

Author: ArgoZhang

test/UnitTest/Services/IpLocatorTest.cs

@@ -108,6 +108,10 @@ public async Task Fetch_Error()
         var result = await provider.Locate("223.91.188.112");
         Assert.Null(result);
 
+        var cancelPprovider = new MockProviderFetchCancelError(factory, option, logger);
+        result = await cancelPprovider.Locate("223.91.188.112");
+        Assert.Null(result);
+
         var configuration = Context.Services.GetRequiredService<IConfiguration>();
         var juHeLogger = Context.Services.GetRequiredService<ILogger<JuHeIpLocatorProvider>>();
         var juHeProvider = new MockProviderJuHeFetchError(factory, configuration, option, juHeLogger);
@@ -163,6 +167,11 @@ class MockProviderFetchError(IHttpClientFactory httpClientFactory, IOptions<Boot
         protected override Task<string?> Fetch(string url, HttpClient client, CancellationToken token) => throw new InvalidOperationException();
     }
 
+    class MockProviderFetchCancelError(IHttpClientFactory httpClientFactory, IOptions<BootstrapBlazorOptions> option, ILogger<MockProviderFetchError> logger) : BaiduIpLocatorProvider(httpClientFactory, option, logger)
+    {
+        protected override Task<string?> Fetch(string url, HttpClient client, CancellationToken token) => throw new TaskCanceledException();
+    }
+
     class MockProviderJuHeFetchError(IHttpClientFactory httpClientFactory, IConfiguration configuration, IOptions<BootstrapBlazorOptions> option, ILogger<JuHeIpLocatorProvider> logger) : JuHeIpLocatorProvider(httpClientFactory, configuration, option, logger)
     {
         protected override Task<string?> Fetch(string url, HttpClient client, CancellationToken token) => throw new InvalidOperationException();