class RuboCop::Cop::RSpec::ExpectActual


expect(false).to eq(true)
# bad (not supported autocorrection)
expect(name).to eq(“John”)
expect(pattern).to eq(/foo/)
expect(price).to eq(5)
# good
expect(“John”).to eq(name)
expect(/foo/).to eq(pattern)
expect(5).to eq(price)
# bad
@example
Autocorrection is performed when the expected is not a literal.
Checks for ‘expect(…)` calls containing literal values.

def complex_literal?(node) 

def complex_literal?(node)
  COMPLEX_LITERALS.include?(node.type) &&
    node.each_child_node.all? { |child_node| literal?(child_node) }
end

def literal?(node)

to not be able to match against an explicit (nil) sexp
This is not implemented using a NodePattern because it seems 
def literal?(node)
  node && (simple_literal?(node) || complex_literal?(node))
end

def on_send(node) 

def on_send(node)
  expect_literal(node) do |actual, send_node, matcher, expected|
    next if SKIPPED_MATCHERS.include?(matcher)
    add_offense(actual) do |corrector|
      next unless CORRECTABLE_MATCHERS.include?(matcher)
      next if literal?(expected)
      corrector.replace(actual, expected.source)
      if matcher == :be
        corrector.replace(expected, actual.source)
      else
        corrector.replace(send_node, "#{matcher}(#{actual.source})")
      end
    end
  end
end

def simple_literal?(node) 

def simple_literal?(node)
  SIMPLE_LITERALS.include?(node.type)
end