Proposal: ExUnit nested tests within describe block can inherit describe's test module attributes

[Brian Cardarella]

Currently if you do:

    ExUnit.Case.register_attribute(__MODULE__, :foo)

    @foo :bar

    describe "outer" do

      test "inner 1", %{registered: %{foo: foo}} do

        IO.inspect(foo)

      end

      test "inner 2", %{registered: %{foo: foo}} do

        IO.inspect(foo)

      end

    end

The result will print `:bar` when "outer inner 1" runs and `nil` when "outer inner 2" runs because the test module attribute values reset after each `test/2`

It would be great if the test module attributes declared above a `describe` could be inherited by all tested `test/2`s.

If there isn't opposition to this idea I can work on implementing it.

        

[José Valim]

There is @describetag that can be used inside the describe block.

    describe "outer" do

     @describetag foo :bar

      test "inner 1", %{registered: %{foo: foo}} do

        IO.inspect(foo)

      end

      test "inner 2", %{registered: %{foo: foo}} do

        IO.inspect(foo)

      end

    end

Wouldn't that be enough?

José Valim

www.plataformatec.com.br

Skype: jv.ptec

Founder and Director of R&D

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[Brian Cardarella]

Here is my usecase, in ecto_fixtures you can declar via macros the fixture state to bring into each test:

    fixture :employee_1

    context :admin

    serialize true

    test "foo bar", %{data: data} do

      ...

    end

Quite often the entire test module would be asserting within an admin context. It would be great to do something like:

    context :admin

    describe "Admin" do

      fixture :employee_

      serialize true

      test "foo bar", %{data: data} do

        ...

      end

      fixture :employee_2

      test "foo bar", %{data: data} do

        ...

      end

    end

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