Class: RuboCop::Cop::Lint::SwallowException

Inherits:
RuboCop::Cop show all
Defined in:
lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb

Instance Method Summary collapse

Instance Method Details

#has_raise?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 32

def has_raise?(node)
  if node.type == :begin
    node.children.any? { |c| raise?(c) }
  else
    raise?(node)
  end
end

#has_raven_capture_exception?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 24

def has_raven_capture_exception?(node)
  if node.type == :begin
    node.children.any? { |c| raven_capture_exception?(c) }
  else
    raven_capture_exception?(node)
  end
end

#on_resbody(node) ⇒ Object 



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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 7

def on_resbody(node)
  # rescue の中身が空ならエラー
  unless node.children[2]
    add_offense(node, :expression, 'rescue body is empty!', :fatal)
    return
  end
  body = node.children[2]
  # トップレベルで条件なしに raise していれば OK
  return if has_raise?(body)
  # トップレベルで Raven.capture_exception 呼び出していれば OK
  return if has_raven_capture_exception?(body)
  # raise も Raven.capture_exception もなければエラー
  add_offense(node, :expression, (<<-MSG).strip, :fatal)
    you have to raise exception or capture exception by Raven in rescue body.
  MSG
end

#raise?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 50

def raise?(node)
  node.type == :send &&
      node.children[0] == nil &&
      node.children[1] == :raise
end

#raven?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 46

def raven?(node)
  node && node.type == :const && node.children[1] == :Raven
end

#raven_capture_exception?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/swallow_exception/cop/lint/swallow_exception.rb', line 40

def raven_capture_exception?(node)
  node.type == :send &&
      raven?(node.children[0]) &&
      node.children[1] == :capture_exception
end