class RuboCop::Cop::RSpec::LetBeforeExamples

Checks for `let` definitions that come after an example.

@example

# Bad
let(:foo) { bar }

it 'checks what foo does' do
  expect(foo).to be
end

let(:some) { other }

it 'checks what some does' do
  expect(some).to be
end

# Good
let(:foo) { bar }
let(:some) { other }

it 'checks what foo does' do
  expect(foo).to be
end

it 'checks what some does' do
  expect(some).to be
end

Constants

MSG

Public Instance Methods

on_block(node) click to toggle source
# File lib/rubocop/cop/rspec/let_before_examples.rb, line 46
def on_block(node)
  return unless example_group_with_body?(node)

  check_let_declarations(node.body) if multiline_block?(node.body)
end

Private Instance Methods

autocorrect(corrector, node, first_example) click to toggle source
# File lib/rubocop/cop/rspec/let_before_examples.rb, line 76
def autocorrect(corrector, node, first_example)
  RuboCop::RSpec::Corrector::MoveNode.new(
    node, corrector, processed_source
  ).move_before(first_example)
end
check_let_declarations(node) click to toggle source
# File lib/rubocop/cop/rspec/let_before_examples.rb, line 58
def check_let_declarations(node)
  first_example = find_first_example(node)
  return unless first_example

  node.each_child_node do |child|
    next if child.sibling_index < first_example.sibling_index
    next unless let?(child)

    add_offense(child) do |corrector|
      autocorrect(corrector, child, first_example)
    end
  end
end
find_first_example(node) click to toggle source
# File lib/rubocop/cop/rspec/let_before_examples.rb, line 72
def find_first_example(node)
  node.children.find { |sibling| example_or_group?(sibling) }
end
multiline_block?(block) click to toggle source
# File lib/rubocop/cop/rspec/let_before_examples.rb, line 54
def multiline_block?(block)
  block.begin_type?
end