ruby-on-rails - 避免 Rspec + Capybara 中的代码重复

Question

假设我对新输入进行了测试，并在输入无效时对新输入进行了测试(第一个测试是在输入有效的情况下进行的)。

例如(来 self 的代码):

 scenario "valid input saving" do
    visit program_stream_path(@program, @stream)
    click_link "#link"
    fill_in "#fill_in", :with=>"1"
    click_button "Next"
    expect(page).to have_current_path new_students_list_stream_path(@stream)
    within("#student_0") do
    fill_in "Имя", :with => "Name"
    fill_in "Фамилия", :with => "Surname"
    fill_in "Электронная почта", :with => "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4032212e242f2d2d21292c002d21292c6e232f2d" rel="noreferrer noopener nofollow">[email protected]</a>"
    end
    print page.html
    click_button "Save"
    expect(page).to have_current_path program_stream_path(@program, @stream)
#...other code
end

显然，检查无效输入行为的测试重复了这一部分:

  scenario "invalid input leads to correct input page" do
  visit program_stream_path(@program, @stream)
        click_link "#link"
        fill_in "#fill_in", :with=>"1"
        click_button "Next"
        expect(page).to have_current_path new_students_list_stream_path(@stream)
          #other code

如何避免这种复制粘贴方式？

Answer 1

你可以在这种情况下使用 before block

feature "..." do
  before :each do
    visit program_stream_path(@program, @stream)
    click_link "#link"
    fill_in "#fill_in", :with=>"1"
    click_button "Next"
    expect(page).to have_current_path new_students_list_stream_path(@stream)
  end

  scenario "valid input saving"
     #unique code for this scenario
  end

  scenario "invalid input leads to correct input page"
    # unique code for this scenario
  end
end

如果想要/需要，外部功能 block 可以是描述或场景 block ，因为您可以嵌套多个级别。如果您需要在多个功能文件中使用代码，那么将其移动到规范帮助程序文件之一中的方法是有意义的。