RSpec如何模擬里面的控制器方法？

Question

我有以下內容：

class PaymentController < ActionController::API
  include ObjectActions

  def error_notification(message)
    puts "An error has occurred: #{message}"
  end
end

module ObjectActions
  extend ActiveSupport::Concern

  def process
    if valid?
      # process payment
    else
      error_notification("Payment is not valid")
    end
  end
end

現在，我試圖在ObjectActions模塊/關注對象內部模擬/添加“外部” error_notification方法。

RSpec.describe ObjectActions, type: :concern do
  include ObjectActions

  before do
    allow(described_class).to receive(:valid?).and_return(false)

    # I KNOW THIS IS NOT RIGHT, HOW CAN I PROPERLY MOCK IT?
    allow(described_class).to receive(:error_notification).and_return("Blah blah")
  end

  context '#process' do
    it { expect { process }.to eq("Blah blah") }
  end
end

Answer 1

簡短的答案是

allow(self).to receive(:error_notification).and_return("Blah blah")

為什么？

您包括要在當前測試中測試的模塊

RSpec.describe ObjectActions, type: :concern do
  include ObjectActions

這就是您應該嘲笑的內容。 但這是一種更好的方法，我不久前在此答案中對此進行了描述： https : //stackoverflow.com/a/48914463/299774