Question

而不是这样做：

subject { response }
context 'when orphan' do
  before do
    post :create, asset: { parent_id: nil, uploaded_file: file }
  end

  it { should have_http_status 201 }
  it { should redirect_to_location '/' }

  it 'create a asset' do
    expect { post :create, asset: { parent_id: nil, uploaded_file: file } }.to change(Asset, :count).by(1)
  end
end

我希望能够做到这一点：

subject { response }
context 'when orphan' do
  before do
    post :create, asset: { parent_id: nil, uploaded_file: file }
  end

  it { should have_http_status 201 }
  it { should redirect_to_location '/' }

  it { should create_an(:asset) }
end

要做到这一点，我将不得不创建一个自定义匹配器：

RSpec::Matchers.define :create_an do |instance| 
    match do |actual|

        #### ALL I NEED IS A WAY TO TRIGGER THIS LINE
        #    BEFORE THE BEFORE BLOCK
        # before_before do
               number_before = count_records
        # end       
        ##############################################
        number_after = count_records

        number_after - number_before == 1
    end

    def count_records
        instance.to_s.classify.constantize.count
    end  

    failure_message_for_should do |actual|
        "..."
    end

    failure_message_for_should_not do |actual|
        "..."
    end

    description do
        "should create an #{instance.to_s}"
    end
end

就像我说的，我需要做的就是运行：

number_before = count_records

在前一块之前，

  before do
    post :create, asset: { parent_id: nil, uploaded_file: file }
  end

正在运行。这可能吗？有任何想法吗？任何钩子rspec为此提供了什么？

Answer 1

我不知道如何实施您所要求的方法，但以下确实减少了一些重复。

context 'when orphan' do
  let(:create) { post :create, asset: { parent_id: nil, uploaded_file: file } }

  context 'the response' do
    before { create }
    subject { response }

    it { is_expected.to have_http_status 201 }
    it { is_expected.to redirect_to_location '/' }
  end

  it 'creates a asset' do
    expect { create }.to change(Asset, :count).by(1)
  end
end

Answer 2

使用时间状态，添加额外的变量

time_b=0 
 do
 number_before = count_records
time_b!=0
do 
  number_after = countrecords
 before do
post :create, asset: { parent_id: nil, uploaded_file: file }
 end

这应该可以解决问题。

在阻止之前运行代码

2 个答案: