Ruby Rspec class_double,每次调用都返回新的REST响应

zmeyuzjn  于 2023-04-29  发布在  Ruby
关注(0)|答案(1)|浏览(73)

我有一个Rspec测试,它需要将RequestHTTPI类/模块加倍,并返回一个模拟的REST响应。我让它工作,直到这个方法发出另一个REST调用并需要返回一个新的REST响应。
API类

注意,这是一个精简版的类,但要点在那里

class API
  include HTTPI
  
  def find_device(id)
    req = create_request('path')
    req.body = { :customerId => MultiJson.dump(customer_id) }
    return call(req)
  end
  
  def find_other_device(other_id)
    req = create_request('path')
    req.body = { :other_id => MultiJson.dump(other_id) }
    data = call(req)
    return data
  end
  
  def call(req)
    response = HTTPI.send(req)
    return response.body
  end
end

设备文件调用REST方法

class Device
  @api = API.new(:open_timeout => 30, :read_timeout => 30)
  def get_device
    devices = @api.find_device(@id)
    log.info("First Call Made")
    other_call = @api.find_other_device(@other_id)
  end
end

规格文件

Rspec.describe Device do
  resp = {code: 200, body: resp_body, raw_body: "TEST BODY", cookies: [cookie_list_hash]}
  resp2 = {code: 200, body: resp_body_2, raw_body: "TEST BODY 2", cookies: [cookie_list_hash]}
  let!(:request) {class_double('Request', new: http).as_stubbed_const} # I understand this causes the HTTPI send request to always return the same resp, but without it the test does not even get past the first call
  let!(:http) {class_double('HTTPI', send: resp).as_stubbed_const}

  it 'test' do
    Device.get_device
  end
end

我们希望做一个double,它首先返回resp var,在第二次调用:send时,它返回resp 2。
我对ruby也很陌生,所以这可能很难看。

vnjpjtjt

vnjpjtjt1#

我将关注您的规范,尽管您的其他类中可能需要审查一些其他内容(取决于您想要实现的内容)。如果你用另一种方式写,你可能会得到它背后的逻辑。首先,您还需要将响应定义为let s;你也可以看看returning different values across multiple calls

Rspec.describe Device do
  let(:resp) do 
    {
      code: 200, body: resp_body, raw_body: "TEST BODY", cookies: [cookie_list_hash]
    }
  end
  let(:resp2) do
    {
      code: 200, body: resp_body_2, raw_body: "TEST BODY 2", cookies: [cookie_list_hash]
    }
  end
  let!(:request) { class_double('Request', new: http).as_stubbed_const }
  let!(:http) { class_double('HTTPI').as_stubbed_const }

  before do
    # see https://www.rubydoc.info/github/rspec/rspec-mocks/RSpec%2FMocks%2FMessageExpectation:and_return
    allow(http).to receive(:send).and_return(resp, resp2)
  end

  it 'test' do
    Device.get_device
  end
end

话虽如此,这可能会解决您的规范中的问题,似乎您也希望您的api对象是一个示例变量,而不是在您的类中定义的东西:

class Device
  def api
    # This will create the API object only once, and return it each time you call it in #get_device
    @api ||= API.new(:open_timeout => 30, :read_timeout => 30)
  end

  def get_device
    devices = api.find_device(@id)
    log.info("First Call Made")
    other_call = api.find_other_device(@other_id)
  end
end

但是,同样,这取决于你想要实现什么,如果你粘贴的代码是完整/正确与否,所以很抱歉,如果这不适用。

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