自建登录验证码

tests/Jiaowu.Api.Tests/CaptchaKitIntegrationTests.cs

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+using CaptchaKit.AspNetCore;
+using CaptchaKit;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Jiaowu.Api.Tests;
+
+public sealed class CaptchaKitIntegrationTests
+{
+    [Fact]
+    public async Task Challenge_is_valid_once_and_the_default_generator_returns_a_png()
+    {
+        var services = new ServiceCollection();
+        services.AddDistributedMemoryCache();
+        services.AddCaptchaKit();
+        services.AddSingleton<ICaptchaGenerator, KnownGenerator>();
+        using var provider = services.BuildServiceProvider();
+        var captcha = provider.GetRequiredService<ICaptchaKitService>();
+
+        var challenge = await captcha.CreateAsync();
+
+        Assert.Equal("image/png", challenge.ContentType);
+        Assert.True(challenge.ImageBytes.AsSpan().StartsWith(new byte[] { 137, 80, 78, 71 }));
+        Assert.True(await captcha.VerifyAsync(challenge.Id, "a1b2"));
+        Assert.False(await captcha.VerifyAsync(challenge.Id, "a1b2"));
+    }
+
+    [Fact]
+    public void Default_generator_returns_png_bytes()
+    {
+        var challenge = new SkiaTextCaptchaGenerator().Generate(
+            new CaptchaGenerationRequest("test", DateTimeOffset.UtcNow.AddMinutes(1), 5));
+
+        Assert.Equal("image/png", challenge.Challenge.ContentType);
+        Assert.True(challenge.Challenge.ImageBytes.AsSpan().StartsWith(new byte[] { 137, 80, 78, 71 }));
+    }
+
+    private sealed class KnownGenerator : ICaptchaGenerator
+    {
+        public GeneratedCaptcha Generate(CaptchaGenerationRequest request) => new(
+            new CaptchaChallenge(request.Id, "image/png", new byte[] { 137, 80, 78, 71 }, request.ExpiresAt),
+            "A1B2");
+    }
+}