Add comprehensive tests for Go and Python version conflict detection and licensing normalization

- Implemented GoVersionConflictDetectorTests to validate pseudo-version detection, conflict analysis, and conflict retrieval for Go modules.
- Created VersionConflictDetectorTests for Python to assess conflict detection across various version scenarios, including major, minor, and patch differences.
- Added SpdxLicenseNormalizerTests to ensure accurate normalization of SPDX license strings and classifiers.
- Developed VendoredPackageDetectorTests to identify vendored packages and extract embedded packages from Python packages, including handling of vendor directories and known vendored packages.

src/Scanner/__Tests/StellaOps.Scanner.Analyzers.Lang.Bun.Tests/Parsers/BunConfigHelperTests.cs

@@ -0,0 +1,226 @@
+using StellaOps.Scanner.Analyzers.Lang.Bun.Internal;
+
+namespace StellaOps.Scanner.Analyzers.Lang.Bun.Tests.Parsers;
+
+public sealed class BunConfigHelperTests
+{
+    private readonly string _tempDir;
+
+    public BunConfigHelperTests()
+    {
+        _tempDir = Path.Combine(Path.GetTempPath(), $"bun-config-test-{Guid.NewGuid():N}");
+        Directory.CreateDirectory(_tempDir);
+    }
+
+    public void Dispose()
+    {
+        if (Directory.Exists(_tempDir))
+        {
+            Directory.Delete(_tempDir, recursive: true);
+        }
+    }
+
+    #region ParseConfig Tests
+
+    [Fact]
+    public void ParseConfig_MissingFile_ReturnsEmpty()
+    {
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Null(result.DefaultRegistry);
+        Assert.Empty(result.ScopeRegistries);
+        Assert.False(result.HasCustomRegistry);
+    }
+
+    [Fact]
+    public void ParseConfig_DefaultRegistry_ReturnsUrl()
+    {
+        var bunfig = """
+            [install]
+            registry = "https://npm.company.com/"
+            """;
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Equal("https://npm.company.com/", result.DefaultRegistry);
+        Assert.True(result.HasCustomRegistry);
+    }
+
+    [Fact]
+    public void ParseConfig_ScopedRegistries_ReturnsMappings()
+    {
+        var bunfig = """
+            [install.scopes]
+            "@company" = "https://npm.company.com/"
+            "@internal" = "https://internal.registry.com/"
+            """;
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Equal(2, result.ScopeRegistries.Count);
+        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
+        Assert.Equal("https://internal.registry.com/", result.ScopeRegistries["@internal"]);
+        Assert.True(result.HasCustomRegistry);
+    }
+
+    [Fact]
+    public void ParseConfig_InlineTableFormat_ExtractsUrl()
+    {
+        var bunfig = """
+            [install.scopes]
+            "@company" = { url = "https://npm.company.com/" }
+            """;
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Single(result.ScopeRegistries);
+        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
+    }
+
+    [Fact]
+    public void ParseConfig_Comments_IgnoresComments()
+    {
+        var bunfig = """
+            # This is a comment
+            [install]
+            # registry for npm packages
+            registry = "https://npm.company.com/"
+            """;
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Equal("https://npm.company.com/", result.DefaultRegistry);
+    }
+
+    [Fact]
+    public void ParseConfig_EmptyFile_ReturnsEmpty()
+    {
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), "");
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Null(result.DefaultRegistry);
+        Assert.Empty(result.ScopeRegistries);
+    }
+
+    [Fact]
+    public void ParseConfig_BothDefaultAndScoped_ReturnsBoth()
+    {
+        var bunfig = """
+            [install]
+            registry = "https://default.registry.com/"
+
+            [install.scopes]
+            "@company" = "https://npm.company.com/"
+            """;
+        File.WriteAllText(Path.Combine(_tempDir, "bunfig.toml"), bunfig);
+
+        var result = BunConfigHelper.ParseConfig(_tempDir);
+
+        Assert.Equal("https://default.registry.com/", result.DefaultRegistry);
+        Assert.Single(result.ScopeRegistries);
+        Assert.Equal("https://npm.company.com/", result.ScopeRegistries["@company"]);
+    }
+
+    #endregion
+
+    #region StripQuotes Tests
+
+    [Fact]
+    public void StripQuotes_DoubleQuotes_RemovesQuotes()
+    {
+        var result = BunConfigHelper.StripQuotes("\"hello world\"");
+
+        Assert.Equal("hello world", result);
+    }
+
+    [Fact]
+    public void StripQuotes_SingleQuotes_RemovesQuotes()
+    {
+        var result = BunConfigHelper.StripQuotes("'hello world'");
+
+        Assert.Equal("hello world", result);
+    }
+
+    [Fact]
+    public void StripQuotes_NoQuotes_ReturnsUnchanged()
+    {
+        var result = BunConfigHelper.StripQuotes("hello world");
+
+        Assert.Equal("hello world", result);
+    }
+
+    [Fact]
+    public void StripQuotes_MismatchedQuotes_ReturnsUnchanged()
+    {
+        var result = BunConfigHelper.StripQuotes("\"hello world'");
+
+        Assert.Equal("\"hello world'", result);
+    }
+
+    [Fact]
+    public void StripQuotes_EmptyString_ReturnsEmpty()
+    {
+        var result = BunConfigHelper.StripQuotes("");
+
+        Assert.Equal("", result);
+    }
+
+    [Fact]
+    public void StripQuotes_SingleCharacter_ReturnsUnchanged()
+    {
+        var result = BunConfigHelper.StripQuotes("a");
+
+        Assert.Equal("a", result);
+    }
+
+    #endregion
+
+    #region ExtractRegistryUrl Tests
+
+    [Fact]
+    public void ExtractRegistryUrl_DirectUrl_ReturnsUrl()
+    {
+        var result = BunConfigHelper.ExtractRegistryUrl("https://npm.company.com/");
+
+        Assert.Equal("https://npm.company.com/", result);
+    }
+
+    [Fact]
+    public void ExtractRegistryUrl_InlineTable_ExtractsUrl()
+    {
+        var result = BunConfigHelper.ExtractRegistryUrl("{ url = \"https://npm.company.com/\" }");
+
+        Assert.Equal("https://npm.company.com/", result);
+    }
+
+    [Fact]
+    public void ExtractRegistryUrl_InlineTableSingleQuotes_ExtractsUrl()
+    {
+        var result = BunConfigHelper.ExtractRegistryUrl("{ url = 'https://npm.company.com/' }");
+
+        Assert.Equal("https://npm.company.com/", result);
+    }
+
+    [Fact]
+    public void ExtractRegistryUrl_InvalidFormat_ReturnsNull()
+    {
+        var result = BunConfigHelper.ExtractRegistryUrl("not-a-url");
+
+        Assert.Null(result);
+    }
+
+    [Fact]
+    public void ExtractRegistryUrl_HttpUrl_ReturnsUrl()
+    {
+        var result = BunConfigHelper.ExtractRegistryUrl("http://internal.registry.local/");
+
+        Assert.Equal("http://internal.registry.local/", result);
+    }
+
+    #endregion
+}