Adding Trait to CollectionDefinition

[xmedeko]

In xUnit and Visual Studio, I would like to group tests marked with the [Collection("DB")] attribute in the Test Explorer. I can group test by the [Trait("Collection", "DB")] attribute only. Is there any way how to assign a specific Trait to all tests with the [Collection("DB")] attribute?
(I have also asked on SO).

[jchannon]

I need something similar, I have some tests in my project split into those that have state and those that don't. These are marked with the Collection attribute. It would be nice to run them such as xunit.console.exe My.dll -collection mycollection and therefore only runs the tests that require state

[zwcloud]

One implementation I found: http://mac-blog.org.ua/xunit-category-trait/

[xmedeko]

@zwcloud it's a bit simplification of the problem, but does not solve that. Now, I have to mark a method

[Trait("Collection", "DB")] 
[Collection("DB")]

With your solution, I would do

[Category("DB")] 
[Collection("DB")]

But I would like to use [Collection("DB")] only and have it automatically added to a Trait.

[bradwilson]

Closed for age.

[TheConstructor]

@bradwilson this is still not possible, right? To me it would also be ok, to just have the collection-name added as collection trait

[bradwilson]

@TheConstructor That is correct, this is not a feature.

If someone wanted to create a PR for this, I wouldn't want to add an automatic trait for every collection, because you potentially run afoul of someone already using a trait named Collection (or whatever name you chose), and some people wouldn't want the additional noise of the extra trait.

I would be willing to accept a PR that adds traits to tests based on putting trait attributes on the collection definition class itself. That would allow people to add whatever traits that wanted (names and values) in a central location.