Question

根据spec section within the minitest docs：gem允许您使用测试的“unit_test”语法或测试的“spec style”语法。

在我的rails应用程序中：我对模型中的作用域进行了两次测试（注意：我正在使用factory_girl在我的测试中构建对象）。根据我的理解，以下是在rails的上下文中使用minitest编写测试的典型方法：

# test/models/city_test.rb
require 'test_helper'

class CityTest < ActiveSupport::TestCase
  test ".with_active_schools should return none" do
    city1 = create(:sequenced_city)
    city2 = create(:sequenced_city)
    create(:sequenced_inactive_school, city: city1)
    create(:sequenced_inactive_school, city: city1)
    create(:sequenced_inactive_school, city: city2)
    create(:sequenced_inactive_school, city: city2)
    assert_equal(0, City.with_active_schools.size)
  end


  test ".with_active_schools should return all" do
    city1 = create(:sequenced_city)
    city2 = create(:sequenced_city)
    create(:sequenced_active_school, city: city1)
    create(:sequenced_active_school, city: city1)
    create(:sequenced_active_school, city: city2)
    create(:sequenced_active_school, city: city2)
    assert_equal(2, City.with_active_schools.size)
  end
end

然后我运行rails test test/models/city_test.rb并且所有测试都通过。

现在我想看看是否可以将上述测试转换为spec-style语法。我在同一个文件中注释掉上面的所有内容。然后我用这段代码替换它：

# test/models/city_test.rb
require 'test_helper'

describe City do
  describe ".with_active_schools" do
    it "returns no cities with active schools" do
      city1 = create(:sequenced_city)
      city2 = create(:sequenced_city)
      create(:sequenced_inactive_school, city: city1)
      create(:sequenced_inactive_school, city: city1)
      create(:sequenced_inactive_school, city: city2)
      create(:sequenced_inactive_school, city: city2)
      expect(City.with_active_schools.size).to eq(0)
    end
    it "returns cities with active schools" do
      city1 = create(:sequenced_city)
      city2 = create(:sequenced_city)
      create(:sequenced_active_school, city: city1)
      create(:sequenced_active_school, city: city1)
      create(:sequenced_active_school, city: city2)
      create(:sequenced_active_school, city: city2)
      expect(City.with_active_schools.size).to eq(2)
    end
  end
end

然后我尝试运行测试：rails test test/models/city_test.rb，但它出错：

对于main：Object（NoMethodError）
，未定义的方法`describe'

我不确定为什么当minitest文档说它支持这种语法时会抛出这个错误。我确实查看了rails指南进行测试，但model testing section中的内容很少。

Answer 1

我得到了规范风格的功能，虽然最初的问题是：“为什么规范风格的语法测试不能在导轨中使用minitest开箱即用”仍然没有答案。希望有人可能知道并提供答案。

我需要做的是加载minitest-spec-rails gem：

#Gemfile

group :development, :test do
  gem 'minitest-spec-rails', '~> 5.4'
end

然后我只需要转换为MiniTest :: Spec断言语法。似乎rspec匹配器语法不起作用：

#test/models/city_test.rb
describe City do
  describe ".with_active_schools" do
    it "has no cities have active schools" do
      city1 = create(:sequenced_city)
      city2 = create(:sequenced_city)
      create(:sequenced_inactive_school, city: city1)
      create(:sequenced_inactive_school, city: city1)
      create(:sequenced_inactive_school, city: city2)
      create(:sequenced_inactive_school, city: city2)
      City.with_active_schools.size.must_equal(0)
    end
    it "has all cities have active schools" do
      city1 = create(:sequenced_city)
      city2 = create(:sequenced_city)
      create(:sequenced_active_school, city: city1)
      create(:sequenced_active_school, city: city1)
      create(:sequenced_active_school, city: city2)
      create(:sequenced_active_school, city: city2)
      City.with_active_schools.size.must_equal(2)
    end
  end
end

现在，当我运行rails test test/models/city_test.rb时，它会起作用。

Answer 2

您必须require 'minitest/spec'才能使describe功能可用。

rails

2 个答案: