ruby-on-rails - # 的 RSpec 3 未定义方法 `allow'

Question

describe '#messages' do
  subject do
    FactoryGirl.create :foo,
      :type => 'test',
      :country => 'US'
  end

  context 'when is not U.S.' do
    before{ allow(subject).to receive(:country).and_return('MX') }

    describe '#messages' do
      subject { super().messages }
      it { is_expected.to include 'This foo was not issued in the United States of America.' }
    end
  end
end

我正在尝试为该主题分配一个属性...我似乎无法正确使用咒语。我这里需要双人间吗？我不确定它是如何工作的，而且我显然无法破译文档。感谢您的帮助。

Answer 1

我认为您应该使用 let 将 subject 变量定义为辅助方法.这样，您就定义了一个可以在文件中任何地方使用的辅助方法。

所以，我将按如下方式修改您的代码:

describe '#messages' do
  let(:subject) do
    FactoryGirl.create :foo,
      :type => 'test',
      :country => 'US'
  end

  context 'when is not U.S.' do
    before{ allow(subject).to receive(:country).and_return('MX') }

    describe '#messages' do
      subject { super().messages }
      it { is_expected.to include 'This foo was not issued in the United States of America.' }
    end
  end
end