Fix resolving hostfxr

.github/workflows/pull-request.yml

@@ -21,7 +21,6 @@ jobs:
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: |
-          3.1.x
           6.0.x
     - name: Restore
       run: dotnet restore -bl:restore.binlog

src/MSBuildLocator.Tests/SemanticVersionParserTests.cs

@@ -0,0 +1,107 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#if NETCOREAPP
+
+using Shouldly;
+using System.Linq;
+using Xunit;
+
+namespace Microsoft.Build.Locator.Tests
+{
+    public class SemanticVersionParserTests
+    {
+        [Fact]
+        public void TryParseTest_ReleaseVersion()
+        {
+            var version = "7.0.333";
+
+            var isParsed = SemanticVersionParser.TryParse(version, out var parsedVerion);
+
+            parsedVerion.ShouldNotBeNull();
+            isParsed.ShouldBeTrue();
+            parsedVerion.Major.ShouldBe(7);
+            parsedVerion.Minor.ShouldBe(0);
+            parsedVerion.Patch.ShouldBe(333);
+            parsedVerion.ReleaseLabels.ShouldBeEmpty();
+        }
+
+        [Fact]
+        public void TryParseTest_PreviewVersion()
+        {
+            var version = "8.0.0-preview.6.23329.7";
+
+            var isParsed = SemanticVersionParser.TryParse(version, out var parsedVerion);
+
+            parsedVerion.ShouldNotBeNull();
+            isParsed.ShouldBeTrue();
+            parsedVerion.Major.ShouldBe(8);
+            parsedVerion.Minor.ShouldBe(0);
+            parsedVerion.Patch.ShouldBe(0);
+            parsedVerion.ReleaseLabels.ShouldBe(new[] { "preview", "6", "23329", "7" });
+        }
+
+        [Fact]
+        public void TryParseTest_InvalidInput_LeadingZero()
+        {
+            var version = "0.0-preview.6";
+
+            var isParsed = SemanticVersionParser.TryParse(version, out var parsedVerion);
+
+            Assert.Null(parsedVerion);
+            isParsed.ShouldBeFalse();
+        }
+
+        [Fact]
+        public void TryParseTest_InvalidInput_FourPartsVersion()
+        {
+            var version = "5.0.3.4";
+
+            var isParsed = SemanticVersionParser.TryParse(version, out var parsedVerion);
+
+            Assert.Null(parsedVerion);
+            isParsed.ShouldBeFalse();
+        }
+
+        [Fact]
+        public void VersionSortingTest_WithPreview()
+        {
+            var versions = new[] { "7.0.7", "8.0.0-preview.6.23329.7", "8.0.0-preview.3.23174.8" };
+
+            var maxVersion = versions.Select(v => SemanticVersionParser.TryParse(v, out var parsedVerion) ? parsedVerion : null).Max();
+
+            maxVersion.OriginalValue.ShouldBe("8.0.0-preview.6.23329.7");
+        }
+
+        [Fact]
+        public void VersionSortingTest_ReleaseOnly()
+        {
+            var versions = new[] { "7.0.7", "3.7.2", "10.0.0" };
+
+            var maxVersion = versions.Max(v => SemanticVersionParser.TryParse(v, out var parsedVerion) ? parsedVerion : null);
+
+            maxVersion.OriginalValue.ShouldBe("10.0.0");
+        }
+
+        [Fact]
+        public void VersionSortingTest_WithInvalidFolderNames()
+        {
+            var versions = new[] { "7.0.7", "3.7.2", "dummy", "5.7.8.9" };
+
+            var maxVersion = versions.Max(v => SemanticVersionParser.TryParse(v, out var parsedVerion) ? parsedVerion : null);
+
+            maxVersion.OriginalValue.ShouldBe("7.0.7");
+        }
+
+        [Fact]
+        public void VersionSortingTest_WithAllInvalidFolderNames()
+        {
+            var versions = new[] { "dummy", "5.7.8.9" };
+
+            var maxVersion = versions.Max(v => SemanticVersionParser.TryParse(v, out var parsedVerion) ? parsedVerion : null);
+
+            maxVersion.ShouldBeNull();
+        }
+    }
+}
+#endif