Add the test that verifies generated join symbol with Ref to derived symbol can be evaluated correctly

[GangWang01]

Problem

dotnet/templating#6291 - lacks test for generated symbol with ref to computed symbol.

Solution

Add the test.

[vlada-shubina]

Please move this test to dotnet/templating as it is testing authoring feature. example: https://github.com/dotnet/templating/blob/main/test/Microsoft.TemplateEngine.IDE.IntegrationTests/SnapshotTests.cs

[GangWang01]

Please move this test to dotnet/templating as it is testing authoring feature. example: https://github.com/dotnet/templating/blob/main/test/Microsoft.TemplateEngine.IDE.IntegrationTests/SnapshotTests.cs

@vlada-shubina when I moved the test to dotnet/templating using verification engine as you suggested, I found a problem. dotnet used by the verification engine in dotnet/templating is specified in https://github.com/dotnet/templating/blob/b1a9547fd5633e59fec7eb609b644c0b387cdf02/global.json#L3 which doesn't have the latest change to dotnet/templating. It's not able to catch issues in time through the test. I think the test should be placed in SDK. How do you think?

[vlada-shubina]

Please move this test to dotnet/templating as it is testing authoring feature. example: https://github.com/dotnet/templating/blob/main/test/Microsoft.TemplateEngine.IDE.IntegrationTests/SnapshotTests.cs

@vlada-shubina when I moved the test to dotnet/templating using verification engine as you suggested, I found a problem. dotnet used by the verification engine in dotnet/templating is specified in https://github.com/dotnet/templating/blob/b1a9547fd5633e59fec7eb609b644c0b387cdf02/global.json#L3 which doesn't have the latest change to dotnet/templating. It's not able to catch issues in time through the test. I think the test should be placed in SDK. How do you think?

We should use API when launching verify tests in templating. Please see example in https://github.com/dotnet/templating/blob/b1a9547fd5633e59fec7eb609b644c0b387cdf02/test/Microsoft.TemplateEngine.IDE.IntegrationTests/SnapshotTests.cs#L39

[GangWang01]

I see. Thanks for the explanation!