MiniTest::Assertions 为应该返回 true 的测试返回 false

Question

我正在尝试学习 MiniTest，通过这样做，我已经开始测试我的一个使用 PayPal API 到 approve/deny 信用卡付款的应用程序。下面是我在 Payment class 中测试购买方法的尝试。（credit_card本来是私有方法，为了测试搬到了public）

payment.rb

require "active_merchant/billing/rails"

class Payment < ActiveRecord::Base
  belongs_to :order
  attr_accessor :card_number, :card_verification

  def purchase(card_info, billing_info)
    if credit_card(card_info).valid?
      response = GATEWAY.purchase(price_in_cents, credit_card(card_info), purchase_options(billing_info))
      @paypal_error = response.message
      response.success?
    end
  end

  def price_in_cents
    (@total.to_f * 100).round
  end


    def credit_card(card_info)
      @credit_card ||= ActiveMerchant::Billing::CreditCard.new(card_info)
    end

  private

  def purchase_options(billing_info)
    billing_info
  end

end

payment_test.rb

require 'test_helper'
require "active_merchant/billing/rails"

class PaymentTest < ActiveSupport::TestCase
  setup do
    @card_info = {
      brand: "Visa",
      number: "4012888888881881",
      verification_value: "123",
      month: "01",
      year: "2019",
      first_name: "Christopher",
      last_name: "Pelnar",
    }
    @purchase = Payment.new
  end

  test "purchase" do
    assert @purchase.credit_card(@card_info).valid?, true
  end

end

运行rake test后的错误信息：

--------------------------
PaymentTest: test_purchase
--------------------------
   (0.1ms)  ROLLBACK
  test_purchase                                                   FAIL (0.02s)
Minitest::Assertion:         true
        test/models/payment_test.rb:20:in `block in <class:PaymentTest>'


Finished in 0.03275s
1 tests, 1 assertions, 1 failures, 0 errors, 0 skips

Answer 1

MiniTest::Assertions assert 方法调用使用语法 assert(test, msg = nil) 您的测试返回 true 的原因是您选择使用的消息。 assert_equal 方法采用 2 个值进行比较。此外，您可以像这样使用 .send 方法，而不是创建私有方法 public：

assert @purchase.send(:credit_card,@card_info).valid?

此外，将设置更改为函数定义：

def setup
  # setup logic
end

要使输出更详细（捕获 ActiveMerchant 错误），请尝试以下操作：

test "purchase" do
  credit_card = @purchase.send(:credit_card, @card_info)
  assert credit_card.valid?, "valid credit card"
  puts credit_card.errors unless credit_card.errors.empty?
end

正在阅读rubyforge API我觉得测试时应该把信用卡类型设置成假的

MiniTest::Assertions 为应该返回 true 的测试返回 false

MiniTest::Assertions returning false for test that should be returning true

ruby

ruby-on-rails

minitest