Added a failing testcase to set up the expectations

for translating the pre-release labels in Git tags to weights.

src/GitVersionCore.Tests/VersionCalculation/Strategies/TaggedCommitVersionStrategyTests.cs

@@ -0,0 +1,43 @@
+using System.Collections.Generic;
+using System.Linq;
+using GitTools.Testing;
+using GitVersion.Configuration;
+using GitVersion.Extensions;
+using GitVersion.Model.Configuration;
+using GitVersion.VersionCalculation;
+using GitVersionCore.Tests.Helpers;
+using LibGit2Sharp;
+using NUnit.Framework;
+using Shouldly;
+
+namespace GitVersionCore.Tests.VersionCalculation.Strategies
+{
+    [TestFixture]
+    public class TaggedCommitVersionStrategyTests : TestBase
+    {
+        [TestCase]
+        public void TagWithPreReleaseLabelShouldBeTranslatedToPreReleaseWeight()
+        {
+            /*todo: Extend the configuration to specify the regex & pre-release weights 
+                    for the tags.
+            */
+
+            using var fixture = new EmptyRepositoryFixture();
+            fixture.Repository.MakeACommit();
+            fixture.BranchTo("develop");
+            fixture.Repository.MakeATaggedCommit("v1.0.0-alpha");
+
+            var strategy = GetVersionStrategy(fixture.Repository, "develop");
+            var baseVersion = strategy.GetVersions().Single();
+
+            baseVersion.SemanticVersion.ToString().ShouldBe("1.0.0-1000");
+        }
+
+        private static IVersionStrategy GetVersionStrategy(
+            IRepository repository, string branch, Config config = null)
+        {
+            var sp = BuildServiceProvider(repository, branch, config);
+            return sp.GetServiceForType<IVersionStrategy, TaggedCommitVersionStrategy>();
+        }
+    }
+}