stub_template isn't working as expected on latest version

[wildmaples]

What Ruby, Rails and RSpec versions are you using?

Ruby version: 3.2
Rails version: 7.0
RSpec version: 6.1.0 (latest)

Observed behaviour

Hi! We are trying to use the latest version of rspec-rails. When requiring RSpec::Rails::ViewExampleGroup::ExampleMethods to use stub_template, we are seeing the following error:

  1) Foo does something
     Failure/Error: stub_template('test/test_email.html.erb' => '<h1>Test email!</h1>')
     
     NameError:
       undefined local variable or method `controller' for #<RSpec::ExampleGroups::Foo "does something" (./emails/spec/testing_spec.rb:11)>
     # ./packs/emails/spec/testing_spec.rb:8:in `block (2 levels) in <main>'
     # -e:1:in `<main>'

Expected behaviour

I would expect stub_template to work. I believe the changes in this PR caused the issue: #2714

Can you provide an example reproduction?

Yep! This is the code to reproduce the error:

class Foo; end

RSpec.describe Foo do
  include RSpec::Rails::ViewExampleGroup::ExampleMethods
  before do
    stub_template('test/test_email.html.erb' => '<h1>Test email!</h1>')
  end

  it 'does something' do
    expect(1).to eq(1)
  end
end

[JonRowe]

👋 Please use the public api include ::RSpec::Rails::ViewExampleGroup or include via tags which is the preferred method. RSpec.describe "Something", type: :view.

You'll notice that in the view there are several things in view specs that depend on controller as a method because thats how Rails does things internally, by bringing in only the DSL module, you're skipping all the setup that makes it work,