59 lines
2.3 KiB
C#
59 lines
2.3 KiB
C#
namespace Yh.SchClass.OpenApi.Tests;
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/// <summary>
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/// 伪造 <see cref="HttpMessageHandler"/>：捕获最近一次请求并回放预设响应。
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/// 与 <c>Yh.Platform.OpenApi.Tests</c> 的 FakeHandler 同构，便于两个 SDK 的测试互相参照。
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/// </summary>
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public sealed class FakeHandler : HttpMessageHandler
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{
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private readonly Func<HttpRequestMessage, string?, HttpResponseMessage> _responder;
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public FakeHandler(Func<HttpRequestMessage, string?, HttpResponseMessage> responder)
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{
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_responder = responder;
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}
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/// <summary>最近一次捕获到的请求。</summary>
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public HttpRequestMessage? LastRequest { get; private set; }
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/// <summary>最近一次请求体（无请求体时为 null）。</summary>
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public string? LastRequestBody { get; private set; }
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/// <summary>最近一次请求体的 Content-Type（无请求体时为 null）。</summary>
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public string? LastContentType { get; private set; }
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protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
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{
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LastRequest = request;
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if (request.Content == null)
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{
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LastRequestBody = null;
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LastContentType = null;
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}
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else
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{
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LastRequestBody = await request.Content.ReadAsStringAsync(cancellationToken);
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LastContentType = request.Content.Headers.ContentType?.MediaType;
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}
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return _responder(request, LastRequestBody);
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}
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/// <summary>回放一段固定 JSON（application/json）。</summary>
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public static FakeHandler Json(HttpStatusCode statusCode, string json)
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=> new((_, _) => new HttpResponseMessage(statusCode)
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{
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Content = new StringContent(json, Encoding.UTF8, "application/json"),
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});
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/// <summary>回放指定状态码且无响应体（模拟 204 / 404 空响应）。</summary>
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public static FakeHandler Empty(HttpStatusCode statusCode)
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=> new((_, _) => new HttpResponseMessage(statusCode));
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/// <summary>回放纯文本响应（模拟非 JSON 的错误页）。</summary>
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public static FakeHandler Text(HttpStatusCode statusCode, string text)
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=> new((_, _) => new HttpResponseMessage(statusCode)
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{
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Content = new StringContent(text, Encoding.UTF8, "text/plain"),
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});
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}
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