RSpec 带变量的存根对象方法

RSpec stub object method with variable

正在测试助手,我 运行 遇到了问题。

我有一个模型的范围: Task.due_within(days)

这是在助手中引用的:

module UsersHelper
  ...
  def show_alert(tasks, properties, user)
    pulse_alert(tasks, properties) ||
      tasks.due_within(7).count.positive? ||
      tasks.needs_more_info.count.positive? ||
      tasks.due_within(14).count.positive? ||
      tasks.created_since(user.last_sign_in_at).count.positive?
  end
  ...
end

所以我正在使用 taskspropertiesuser:

的存根进行测试
RSpec.describe UsersHelper, type: :helper do
  describe '#show_alert' do
    it 'returns true if there are tasks due within 7 days' do
      tasks = double(:task, due_within: [1, 2, 3, 4], past_due: [])
      properties = double(:property, over_budget: [], nearing_budget: [])
      user = double(:user)

      expect(helper.show_alert(tasks, properties, user)).to eq true
    end

    it 'returns true if there are tasks due within 14 days' do
      # uh oh. This test would be exactly the same as above.
    end
  end
end

这通过了,但是当我去为 it 'returns true if there are tasks due within 14 days 编写测试时,我意识到我的 double(:task, due_within: []) 没有与提供给方法的变量交互。

如何编写一个关心提供给方法的变量的存根?

显然这行不通:

tasks = double(:task, due_within(7): [1, 2], due_within(14): [1, 2, 3, 4])

为了处理不同的情况,你能试试这样吗?

allow(:tasks).to receive(:due_within).with(7).and_return(*insert expectation*)
allow(:tasks).to receive(:due_within).with(14).and_return(*insert expectation*)

由于您正在测试 show_alert 方法,您可能希望将测试单独隔离到 show_alert 方法,即模拟 due_within 的 return 值如上。 due_within 的功能将在单独的测试用例中处理。