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単体テスト用に ActionView::Helpers::FormBuilder オブジェクトを生成する

Last updated at Posted at 2022-05-17

方法

class DummyFormBuilder < ActionView::Helpers::FormBuilder
  # 引数に Active Record を渡す前提。
  def initialize(model_object)
    object_name = model_object.model_name.param_key
    template = ActionView::Base.empty
    options = {}

    super(object_name, model_object, template, options)
  end
end
# user #=> #<User id: 1, ..., updated_at: "2022-01-01 00:00:00.000000000 +0900">
# user.model_name.param_key #=> "user"
let!(:f) { DummyFormBuilder.new(user) }

バージョン情報

  • Ruby 2.7.6
  • Rails 6.1.6

参考

Rails

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