Add the generated builders in the Test project?

[JoanComasFdz]

Right now the builders are created in the same project where the decorated classes live in.

Given that the Attributes and the SourceGenerator and already split in two NuGet packages, I would like to be able to decorate the classes in the production project, but create the Data Builders in the test project.

Example:

TestApp

• Dependencies
  • Packages
    • DataBuilderGenerator.Attributes
• Person.cs

TestApp.Tests

• Dependencies
  • Analyzers
    • DataBuilderGenerator
  • Packages
    • DataBuilderGenerator

After building the solution:

TestApp.Tests

• Dependencies
  • Analyzers
    • DataBuilderGenerator
      • PersonBuilder.cs
  • Packages
    • DataBuilderGenerator

This way, production code is not polluted with testing code.

Do you have any directions on how to achieve this?

[dasMulli]

The attributes (+ assembly) should be removed from the built projects due to the conditional attribute on them..

I was more thinking of doing something completely different and only in the test project like

[assemby: GenerateDataBuilder(typeof(Model))]

or

[GenerateDataBuilder(typeof(Customer))]
public partial class Builders
{
    public static CustomerBuilder DefaultCustomer => Builders.Customer.WithName("foo").WithAddress(...);
}

That also has the added benefit of being able to look at the metadata of the referenced assembly instead of the syntactic/semantic models of the code being built to generate the code, that could benefit from Roslyn 4's incremental generator feature

[JoanComasFdz]

So I am trying to follow that same approach where a nuget is added to a unit testing project and it automatically generates whatever files are needed, in this repo:

https://github.com/JoanComasFdz/dotnet-scenario-unittesting

I am analyzing the referenced projects, looking for types and generating some files for them.

Unfortunately, this doesn't seem to be working for xUnit projects: https://github.com/dotnet/roslyn-sdk/issues/972#