class RuboCop::Cop::RSpec::ImplicitSubject


it { expect(named_subject).to be_truthy }
# good
end
is_expected.to be_truthy
it do
# good
end
expect(subject).to be_truthy
it do
# bad
it { is_expected.to be_truthy }
# good
it { expect(subject).to be_truthy }
# bad
@example ‘EnforcedStyle: require_implicit`
it { expect(subject).to be_truthy }
# good
it { is_expected.to be_truthy }
# bad
@example `EnforcedStyle: disallow`
end
is_expected.to be_truthy
it do
end
expect(subject).to be_truthy
foo = 1
it do
# good
end
is_expected.to be_truthy
foo = 1
it do
# bad
@example `EnforcedStyle: single_statement_only`
end
expect(subject).to be_truthy
it do
it { is_expected.to be_truthy }
# good
end
is_expected.to be_truthy
it do
# bad
@example `EnforcedStyle: single_line_only` (default)
This cop can be configured using the `EnforcedStyle` option
Checks for usage of implicit subject (`is_expected` / `should`).

def autocorrect(corrector, node) 

def autocorrect(corrector, node)
  case node.method_name
  when :expect
    corrector.replace(node, 'is_expected')
  when :is_expected
    corrector.replace(node.location.selector, 'expect(subject)')
  when :should
    corrector.replace(node.location.selector, 'expect(subject).to')
  when :should_not
    corrector.replace(node.location.selector, 'expect(subject).not_to')
  end
end

def example_of(node) 

def example_of(node)
  node.each_ancestor.find do |ancestor|
    example?(ancestor)
  end
end

def implicit_subject_in_non_its?(node) 

def implicit_subject_in_non_its?(node)
  implicit_subject?(node) && !its?(node)
end

def implicit_subject_in_non_its_and_non_single_line?(node) 

def implicit_subject_in_non_its_and_non_single_line?(node)
  implicit_subject_in_non_its?(node) && !single_line?(node)
end

def implicit_subject_in_non_its_and_non_single_statement?(node) 

def implicit_subject_in_non_its_and_non_single_statement?(node)
  implicit_subject_in_non_its?(node) && !single_statement?(node)
end

def invalid?(node) 

def invalid?(node)
  case style
  when :require_implicit
    explicit_unnamed_subject?(node)
  when :disallow
    implicit_subject_in_non_its?(node)
  when :single_line_only
    implicit_subject_in_non_its_and_non_single_line?(node)
  when :single_statement_only
    implicit_subject_in_non_its_and_non_single_statement?(node)
  end
end

def its?(node) 

def its?(node)
  example_of(node)&.method?(:its)
end

def message(_node) 

def message(_node)
  case style
  when :require_implicit
    MSG_REQUIRE_IMPLICIT
  else
    MSG_REQUIRE_EXPLICIT
  end
end

def on_send(node) 

def on_send(node)
  return unless invalid?(node)
  add_offense(node) do |corrector|
    autocorrect(corrector, node)
  end
end

def single_line?(node) 

def single_line?(node)
  example_of(node)&.single_line?
end

def single_statement?(node) 

def single_statement?(node)
  !example_of(node)&.body&.begin_type?
end