`let` and `let!` to be declared before `before` and `after` blocks?

[schinery]

In many of the examples, such as Let Grouping and Leading Subject, it implies that the spec structure should be:

describe Article do
  subject { FactoryBot.create(:some_article) }
  let(:user) { FactoryBot.create(:user) }

  before do
    # ...
  end

  describe '#summary' do
    # ...
  end
end

where the let is declared before the before block. Is this a correct assumption and should it be in the style guide?

# Bad
describe Article do
  subject { FactoryBot.create(:some_article) }

  before do
    # ...
  end

  let(:user) { FactoryBot.create(:user) }

  describe '#summary' do
    # ...
  end
end

# Good
describe Article do
  subject { FactoryBot.create(:some_article) }
  let(:user) { FactoryBot.create(:user) }

  before do
    # ...
  end

  describe '#summary' do
    # ...
  end
end

[pirj]

It’s a common practice. A pr is welcome.