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

src/Concelier/__Tests/StellaOps.Concelier.Normalization.Tests/ApkVersionParserTests.cs

@@ -0,0 +1,34 @@
+using StellaOps.Concelier.Normalization.Distro;
+
+namespace StellaOps.Concelier.Normalization.Tests;
+
+public sealed class ApkVersionParserTests
+{
+    [Fact]
+    public void ToCanonicalString_RoundTripsExplicitPkgRel()
+    {
+        var parsed = ApkVersion.Parse(" 3.1.4-r0 ");
+
+        Assert.Equal("3.1.4-r0", parsed.Original);
+        Assert.Equal("3.1.4-r0", parsed.ToCanonicalString());
+    }
+
+    [Fact]
+    public void ToCanonicalString_SuppressesImplicitPkgRel()
+    {
+        var parsed = ApkVersion.Parse("1.2.3_alpha");
+
+        Assert.Equal("1.2.3_alpha", parsed.ToCanonicalString());
+    }
+
+    [Fact]
+    public void TryParse_TracksExplicitRelease()
+    {
+        var success = ApkVersion.TryParse("2.0.1-r5", out var parsed);
+
+        Assert.True(success);
+        Assert.NotNull(parsed);
+        Assert.True(parsed!.HasExplicitPkgRel);
+        Assert.Equal(5, parsed.PkgRel);
+    }
+}