Rspec - 如何编写类方法的测试

Question

RoR和Rspec是新手我很努力为这种情况编写测试。

# Table name: countries 
# 
# id    :integer   not null, primary key 
# code   :string(255)  not null 
# name   :string(255) 
# display_order :integer 
# create_user_id :integer   not null 
# update_user_id :integer 
# created_at  :datetime   not null 
# updated_at  :datetime 
# eff_date  :date 
# exp_Date  :date 

我想测试在全国模型这种方法：

def self.get_default_country_name_order 
     countries = Country.in_effect.all.where("id !=?" ,WBConstants::DEFAULT_COUNTRY_ID).order("name") 
    result = countries 
    end 

在我country_spec我有这样的：

describe Country do 
    before(:all) do 
    DatabaseCleaner.clean_with(:truncation) 
    end 
    let(:user){create(:user)} 
    let(:country3){create(:country,code:"AUS", name:"Australia", create_user:user, eff_date: Time.new(9999,12,31), exp_date: Time.new(9999,12,31))} 

    after(:all) do 
    DatabaseCleaner.clean_with(:truncation) 
    end 

这个国家会过期，一个有一个名为范围在过滤掉过期国家的模型上。我的测试应该是这样的：

it "should not include an expired country" do 
    c = Country.get_default_country_name_order 
    end 

这到目前为止是否正确？该测试似乎没有从该方法返回任何内容？

Answer 1

是的，这是正确的方向。

若要坚持您的Country模型解决的问题，您应该改变这样的：

let(:country3){create(:country,code:"AUS", name:"Australia", create_user:user, eff_date: Time.new(9999,12,31), exp_date: Time.new(9999,12,31))} 

这样：

before {create(:country,code:"AUS", name:"Australia", create_user:user, eff_date: Time.new(9999,12,31), exp_date: Time.new(9999,12,31))} 

或在您的测试呼叫:country3：

it "should not include an expired country" do 
    country3 
    c = Country.get_default_country_name_order 
end 

let(:country3)只是“注册”一个被调用的方法（in你的例子，它填充数据库），但它不会自动执行。只要你不需要从这个方法返回的值，你应该坚持before，它会自动执行代码。

另一方面，您可能需要测试Country型号的返回值。例如：

it "should not include an expired country" do 
    example_country = country3 
    c = Country.get_default_country_name_order 
    expect(c).to eq example_country 
end 

希望有所帮助。

祝你好运！

UPDATE

如何与before

describe Country do 
    before(:all) do 
    DatabaseCleaner.clean_with(:truncation) 
    end 
    let(:user){create(:user)} 
    let(:country3){create(:country,code:"AUS", name:"Australia", create_user:user, eff_date: Time.new(9999,12,31), exp_date: Time.new(9999,12,31))} 

    after(:all) do 
    DatabaseCleaner.clean_with(:truncation) 
    end 

    describe "#get_default_country_name_order" do 
    # you can register another "before" 
    before {create(:country,code:"AUS", name:"Australia", create_user:user, eff_date: Time.new(9999,12,31), exp_date: Time.new(9999,12,31))} 

    # or simpler - this will call your method 
    # before "it", and create the record 
    # before { country3 } 

    it "should not include an expired country" do 
     # your expectations here 
    end 
    end