Class: RuboCop::Cop::RSpec::ImplicitSubject

Inherits:
Cop
  • Object
show all
Includes:
ConfigurableEnforcedStyle
Defined in:
lib/rubocop/cop/rspec/implicit_subject.rb

Overview

Checks for usage of implicit subject (‘is_expected` / `should`).

This cop can be configured using the ‘EnforcedStyle` option

Examples:

‘EnforcedStyle: single_line_only`

# bad
it do
  is_expected.to be_truthy
end

# good
it { is_expected.to be_truthy }
it do
  expect(subject).to be_truthy
end

‘EnforcedStyle: disallow`

# bad
it { is_expected.to be_truthy }

# good
it { expect(subject).to be_truthy }

Constant Summary collapse

MSG = 
"Don't use implicit subject."

Constants inherited from Cop

Cop::DEFAULT_CONFIGURATION, Cop::DEFAULT_PATTERN_RE

Constants included from RSpec::Language

RSpec::Language::ALL, RSpec::Language::RSPEC

Instance Method Summary collapse

Methods inherited from Cop

inherited, #relevant_file?

Instance Method Details

#autocorrect(node) ⇒ Object 



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# File 'lib/rubocop/cop/rspec/implicit_subject.rb', line 45

def autocorrect(node)
  replacement = 'expect(subject)'
  if node.method_name == :should
    replacement += '.to'
  elsif node.method_name == :should_not
    replacement += '.not_to'
  end

  ->(corrector) { corrector.replace(node.loc.selector, replacement) }
end

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/rspec/implicit_subject.rb', line 38

def on_send(node)
  return unless implicit_subject?(node)
  return if valid_usage?(node)

  add_offense(node)
end