Refactor code structure for improved readability and maintainability; optimize performance in key functions.

src/Concelier/__Tests/StellaOps.Concelier.Connector.Distro.Alpine.Tests/AlpineSecDbParserTests.cs

@@ -0,0 +1,26 @@
+using System.Linq;
+using StellaOps.Concelier.Connector.Distro.Alpine.Dto;
+using Xunit;
+
+namespace StellaOps.Concelier.Connector.Distro.Alpine.Tests;
+
+public sealed class AlpineSecDbParserTests
+{
+    [Fact]
+    public void Parse_SecDbFixture_ExtractsPackagesAndMetadata()
+    {
+        var dto = AlpineFixtureReader.LoadDto("v3.20-main.json");
+
+        Assert.Equal("v3.20", dto.DistroVersion);
+        Assert.Equal("main", dto.RepoName);
+        Assert.Equal("https://dl-cdn.alpinelinux.org/alpine", dto.UrlPrefix);
+        Assert.NotEmpty(dto.Packages);
+
+        var apkTools = dto.Packages.Single(pkg => pkg.Name == "apk-tools");
+        Assert.True(apkTools.Secfixes.ContainsKey("2.12.6-r0"));
+        Assert.Contains("CVE-2021-36159", apkTools.Secfixes["2.12.6-r0"]);
+
+        var busybox = dto.Packages.Single(pkg => pkg.Name == "busybox");
+        Assert.True(busybox.Secfixes.Keys.Any());
+    }
+}