class RuboCop::Cop::RSpec::VariableName

subject(:userName) { ‘Adam’ }
let(:userName) { ‘Adam’ }
# good
subject(:user_name) { ‘Adam’ }
let(:user_name) { ‘Adam’ }
# bad
@example EnforcedStyle: camelCase
subject(:user_name) { ‘Adam’ }
let(:user_name) { ‘Adam’ }
# good
subject(:userName) { ‘Adam’ }
let(:userName) { ‘Adam’ }
# bad
@example EnforcedStyle: snake_case (default)
Checks that memoized helper names use the configured style.

def message(style) 

def message(style)
  format(MSG, style: style)
end

def on_send(node) 

def on_send(node)
  variable_definition?(node) do |variable|
    return if variable.dstr_type? || variable.dsym_type?
    check_name(node, variable.value, variable.loc.expression)
  end
end