test(nuget): add test to reproduce the issue

Author: werwolfby

source/Nuke.Tooling.Tests/NuGetPackageResolverTest.cs

@@ -41,6 +41,20 @@ public void TestGetGlobalInstalledPackage()
         result.Version.OriginalVersion.Should().Be(XunitConsolePackageVersion);
     }
 
+    [Fact]
+    public void TestGetGlobalInstalledPackageWithDuplicateNupkg()
+    {
+        var result = NuGetPackageResolver.GetGlobalInstalledPackage("coverlet.console", version: null, packagesConfigFile: null);
+        // Null is the result as well, but it is inconclusive :(
+        if (result != null)
+        {
+            result.Should().NotBeNull();
+            result.Id.Should().Be("coverlet.console");
+            result.File.Name.Should().EndWith("nupkg");
+            // Do not check version as it is not deterministic
+        }
+    }
+
     [Fact]
     public void TestGetLocalInstalledPackageViaProjectFile()
     {