Question

我有以下传递

的rspec请求规范示例

it "increases count by 1" do
  attributes = attributes_for(:district)
  expect { post admin_districts_path, params: { district: attributes} }.to change { District.count }.by(1)
end

expect行有点忙，所以我试图将其分解。以下导致错误

it "increases count by 1" do
  attributes = attributes_for(:district)
  block = { post admin_districts_path, params: { district: attributes} }
  expect(block).to change { District.count }.by(1)
end

有错误

syntax error, unexpected '}', expecting keyword_end

为什么会发生这种错误？有没有更简洁的方法来编写这个规范示例？

Answer 1

我经常在测试中遇到这种长线。我没有创建新的变量来改善阅读，而是将它分成不同的行，如下所示：

it "increases count by 1" do
  attributes = attributes_for(:district)
  expect do
    post admin_districts_path, params: { district: attributes}
  end.to change { District.count }.by(1)
end

Answer 2

此外，您可以创建一个lambda：

block = -> { post admin_districts_path, params: { district: attributes} }
expect(block).to change { District.count }.by(1)

Answer 3

我更喜欢在相关的describe块中创建一些辅助方法。这是从样本Rails请求规范中获取的，我假设您已经设置了FactoryBot。像这样：

describe "create /district" do
    def create_district_request
      @district = build(:district)
      params = {district: {name: @district.name etc.}}
      post district_path, params: params
    end    

    it "creates a district" do
      expect {create_district_request}.to change{District.count}.by(1)
    end
end

希望有帮助。

更可读的请求规范，可更改模型计数

3 个答案: