Rename Vexer to Excititor
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using System.Collections.Generic;
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using System.Net;
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using System.Net.Http;
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using System.Text;
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using FluentAssertions;
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using Microsoft.Extensions.Caching.Memory;
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using Microsoft.Extensions.Logging.Abstractions;
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using StellaOps.Excititor.Connectors.Ubuntu.CSAF.Configuration;
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using StellaOps.Excititor.Connectors.Ubuntu.CSAF.Metadata;
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using System.IO.Abstractions.TestingHelpers;
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using Xunit;
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using System.Threading;
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namespace StellaOps.Excititor.Connectors.Ubuntu.CSAF.Tests.Metadata;
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public sealed class UbuntuCatalogLoaderTests
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{
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private const string SampleIndex = """
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{
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"generated": "2025-10-10T00:00:00Z",
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"channels": [
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{
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"name": "stable",
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"catalogUrl": "https://ubuntu.com/security/csaf/stable/catalog.json",
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"sha256": "abc",
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"lastUpdated": "2025-10-09T10:00:00Z"
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},
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{
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"name": "esm",
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"catalogUrl": "https://ubuntu.com/security/csaf/esm/catalog.json",
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"sha256": "def",
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"lastUpdated": "2025-10-08T10:00:00Z"
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}
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]
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}
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""";
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[Fact]
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public async Task LoadAsync_FetchesAndCachesIndex()
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{
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var handler = new TestHttpMessageHandler(new Dictionary<Uri, HttpResponseMessage>
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{
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[new Uri("https://ubuntu.com/security/csaf/index.json")] = CreateResponse(SampleIndex),
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});
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var client = new HttpClient(handler);
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var factory = new SingleClientHttpClientFactory(client);
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var cache = new MemoryCache(new MemoryCacheOptions());
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var fileSystem = new MockFileSystem();
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var loader = new UbuntuCatalogLoader(factory, cache, fileSystem, NullLogger<UbuntuCatalogLoader>.Instance, new AdjustableTimeProvider());
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var options = new UbuntuConnectorOptions
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{
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IndexUri = new Uri("https://ubuntu.com/security/csaf/index.json"),
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OfflineSnapshotPath = "/snapshots/ubuntu-index.json",
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};
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var result = await loader.LoadAsync(options, CancellationToken.None);
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result.Metadata.Channels.Should().HaveCount(1);
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result.Metadata.Channels[0].Name.Should().Be("stable");
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fileSystem.FileExists(options.OfflineSnapshotPath!).Should().BeTrue();
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result.FromCache.Should().BeFalse();
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handler.ResetInvocationCount();
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var cached = await loader.LoadAsync(options, CancellationToken.None);
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cached.FromCache.Should().BeTrue();
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handler.InvocationCount.Should().Be(0);
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}
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[Fact]
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public async Task LoadAsync_UsesOfflineSnapshotWhenPreferred()
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{
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var handler = new TestHttpMessageHandler(new Dictionary<Uri, HttpResponseMessage>());
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var client = new HttpClient(handler);
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var factory = new SingleClientHttpClientFactory(client);
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var cache = new MemoryCache(new MemoryCacheOptions());
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var fileSystem = new MockFileSystem();
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fileSystem.AddFile("/snapshots/ubuntu-index.json", new MockFileData($"{{\"metadata\":{SampleIndex},\"fetchedAt\":\"2025-10-10T00:00:00Z\"}}"));
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var loader = new UbuntuCatalogLoader(factory, cache, fileSystem, NullLogger<UbuntuCatalogLoader>.Instance, new AdjustableTimeProvider());
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var options = new UbuntuConnectorOptions
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{
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IndexUri = new Uri("https://ubuntu.com/security/csaf/index.json"),
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OfflineSnapshotPath = "/snapshots/ubuntu-index.json",
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PreferOfflineSnapshot = true,
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Channels = { "stable" }
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};
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var result = await loader.LoadAsync(options, CancellationToken.None);
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result.FromOfflineSnapshot.Should().BeTrue();
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result.Metadata.Channels.Should().NotBeEmpty();
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}
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[Fact]
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public async Task LoadAsync_ThrowsWhenNoChannelsMatch()
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{
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var handler = new TestHttpMessageHandler(new Dictionary<Uri, HttpResponseMessage>
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{
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[new Uri("https://ubuntu.com/security/csaf/index.json")] = CreateResponse(SampleIndex),
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});
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var client = new HttpClient(handler);
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var factory = new SingleClientHttpClientFactory(client);
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var cache = new MemoryCache(new MemoryCacheOptions());
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var fileSystem = new MockFileSystem();
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var loader = new UbuntuCatalogLoader(factory, cache, fileSystem, NullLogger<UbuntuCatalogLoader>.Instance, new AdjustableTimeProvider());
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var options = new UbuntuConnectorOptions
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{
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IndexUri = new Uri("https://ubuntu.com/security/csaf/index.json"),
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};
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options.Channels.Clear();
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options.Channels.Add("nonexistent");
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await Assert.ThrowsAsync<InvalidOperationException>(() => loader.LoadAsync(options, CancellationToken.None));
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}
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private static HttpResponseMessage CreateResponse(string payload)
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=> new(HttpStatusCode.OK)
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{
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Content = new StringContent(payload, Encoding.UTF8, "application/json"),
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};
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private sealed class SingleClientHttpClientFactory : IHttpClientFactory
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{
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private readonly HttpClient _client;
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public SingleClientHttpClientFactory(HttpClient client)
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{
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_client = client;
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}
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public HttpClient CreateClient(string name) => _client;
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}
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private sealed class AdjustableTimeProvider : TimeProvider
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{
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private DateTimeOffset _now = DateTimeOffset.UtcNow;
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public override DateTimeOffset GetUtcNow() => _now;
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}
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private sealed class TestHttpMessageHandler : HttpMessageHandler
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{
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private readonly Dictionary<Uri, HttpResponseMessage> _responses;
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public TestHttpMessageHandler(Dictionary<Uri, HttpResponseMessage> responses)
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{
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_responses = responses;
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}
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public int InvocationCount { get; private set; }
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public void ResetInvocationCount() => InvocationCount = 0;
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protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
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{
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InvocationCount++;
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if (request.RequestUri is not null && _responses.TryGetValue(request.RequestUri, out var response))
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{
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var payload = await response.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
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return new HttpResponseMessage(response.StatusCode)
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{
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Content = new StringContent(payload, Encoding.UTF8, "application/json"),
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};
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}
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return new HttpResponseMessage(HttpStatusCode.InternalServerError)
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{
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Content = new StringContent("unexpected request"),
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};
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}
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}
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}
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@@ -0,0 +1,17 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net10.0</TargetFramework>
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<LangVersion>preview</LangVersion>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\StellaOps.Excititor.Connectors.Ubuntu.CSAF\StellaOps.Excititor.Connectors.Ubuntu.CSAF.csproj" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="FluentAssertions" Version="6.12.0" />
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<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
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<PackageReference Include="System.IO.Abstractions.TestingHelpers" Version="20.0.28" />
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</ItemGroup>
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</Project>
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