class RuboCop::Cop::RSpec::ImplicitSubject
Checks for usage of implicit subject (`is_expected` / `should`).
This cop can be configured using the `EnforcedStyle` option
@example `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
@example `EnforcedStyle: disallow`
# bad it { is_expected.to be_truthy } # good it { expect(subject).to be_truthy }
Constants
- MSG
Public Instance Methods
autocorrect(node)
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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)
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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
Private Instance Methods
allowed_by_style?(example)
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# File lib/rubocop/cop/rspec/implicit_subject.rb, line 65 def allowed_by_style?(example) if style == :single_line_only example.single_line? elsif style == :single_statement_only !example.body.begin_type? else false end end
valid_usage?(node)
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# File lib/rubocop/cop/rspec/implicit_subject.rb, line 58 def valid_usage?(node) example = node.ancestors.find { |parent| example?(parent) } return false if example.nil? example.method_name == :its || allowed_by_style?(example) end