Rspec，如何期望仅接收键值对的子集？

Question

我有一个规范，期望一个类接收带有一些参数的方法。我只想检查参数哈希中的键/值对的子集：

  it 'calls Stripe::Checkout::Session#create with the correct line items' do
      expect(Stripe::Checkout::Session).to receive(:create).with({
          line_items: [{
            price: "bla",
            quantity: 1
          }],
        }
      )
      subject
    end

这里我只想检查参数哈希中是否存在具有正确值的 line_items。

但是收到的实际哈希值有更多值，我收到以下错误：

#<Stripe::Checkout::Session (class)> received :create with unexpected arguments
     expected: ({:line_items=>[{:price=>"bla", :quantity=>1}]}, *(any args))
          got: ({:allow_promotion_codes=>true, :automatic_tax=>{:enabled=>true}, :billing_address_collection=>"requir...vh.me/fr/thank-you?checkout_session_id={CHECKOUT_SESSION_ID}", :tax_id_collection=>{:enabled=>true}}, {:stripe_account=>"bla"})

如何告诉 rspec 仅检查键/值对的子集是否存在？

Answer 1

您想要

hash_including

，它匹配哈希的子集：

  ...to receive(:create).with(hash_including(
    line_items: [{
      price: "bla",
      quantity: 1
    }],
  )

请参阅文档：https://relishapp.com/rspec/rspec-mocks/v/3-2/docs/setting-constraints/matching-arguments