Restructure solution layout by module

src/Concelier/__Tests/StellaOps.Concelier.Merge.Tests/SemanticVersionRangeResolverTests.cs

@@ -0,0 +1,67 @@
+using StellaOps.Concelier.Merge.Comparers;
+
+namespace StellaOps.Concelier.Merge.Tests;
+
+public sealed class SemanticVersionRangeResolverTests
+{
+    [Theory]
+    [InlineData("1.2.3", true)]
+    [InlineData("1.2.3-beta.1", true)]
+    [InlineData("invalid", false)]
+    [InlineData(null, false)]
+    public void TryParse_ReturnsExpected(string? input, bool expected)
+    {
+        var success = SemanticVersionRangeResolver.TryParse(input, out var version);
+
+        Assert.Equal(expected, success);
+        Assert.Equal(expected, version is not null);
+    }
+
+    [Fact]
+    public void Compare_ParsesSemanticVersions()
+    {
+        Assert.True(SemanticVersionRangeResolver.Compare("1.2.3", "1.2.2") > 0);
+        Assert.True(SemanticVersionRangeResolver.Compare("1.2.3-beta", "1.2.3") < 0);
+    }
+
+    [Fact]
+    public void Compare_UsesOrdinalFallbackForInvalid()
+    {
+        var left = "zzz";
+        var right = "aaa";
+        var expected = Math.Sign(string.CompareOrdinal(left, right));
+        var actual = Math.Sign(SemanticVersionRangeResolver.Compare(left, right));
+
+        Assert.Equal(expected, actual);
+    }
+
+    [Fact]
+    public void ResolveWindows_WithFixedVersion_ComputesExclusiveUpper()
+    {
+        var (introduced, exclusive, inclusive) = SemanticVersionRangeResolver.ResolveWindows("1.0.0", "1.2.0", null);
+
+        Assert.Equal(SemanticVersionRangeResolver.Parse("1.0.0"), introduced);
+        Assert.Equal(SemanticVersionRangeResolver.Parse("1.2.0"), exclusive);
+        Assert.Null(inclusive);
+    }
+
+    [Fact]
+    public void ResolveWindows_WithLastAffectedOnly_ComputesInclusiveAndExclusive()
+    {
+        var (introduced, exclusive, inclusive) = SemanticVersionRangeResolver.ResolveWindows("1.0.0", null, "1.1.5");
+
+        Assert.Equal(SemanticVersionRangeResolver.Parse("1.0.0"), introduced);
+        Assert.Equal(SemanticVersionRangeResolver.Parse("1.1.6"), exclusive);
+        Assert.Equal(SemanticVersionRangeResolver.Parse("1.1.5"), inclusive);
+    }
+
+    [Fact]
+    public void ResolveWindows_WithNeither_ReturnsNullBounds()
+    {
+        var (introduced, exclusive, inclusive) = SemanticVersionRangeResolver.ResolveWindows(null, null, null);
+
+        Assert.Null(introduced);
+        Assert.Null(exclusive);
+        Assert.Null(inclusive);
+    }
+}