DRS问题与Rspec我该如何解决它

Question

我是新的Ruby和Rspec。我正在写我的第一个RSpec测试，我认为我的代码不太好。但我不知道如何让它变得更好。

在这个文件中，我将检查我的地址类。 first_name和last_name是相同的，但我有两个大块。我如何重构我的代码？什么是检查RegExp的好方法。

谢谢。

specify { Factory.build(:address).should be_valid } 


    ### first_name ### 

    it "should be invalid without an first_name" do 
    Factory.build(:address, :first_name => nil).should_not be_valid 
    end 


    context "first_name" do 

    it "should be invalid with more than 20 chars" do 
     Factory.build(:address, :first_name => "#{'b'*21}").should_not be_valid 
    end 

    it "should be invalid with less than 3 chars" do 
     Factory.build(:address, :first_name => "ll").should_not be_valid 
    end 

    it "should be valid with an valid first_name" do  
     valid_names.each do |name| 
     Factory.build(:address, :first_name => name).should be_valid 
     end 
    end 

    it "should be invalid with an invalid first_name" do 
     invalid_names.each do |name| 
     Factory.build(:address, :first_name => name).should_not be_valid 
     end 
    end  
    end 


    ### last_name ### 

    it "should be invalid without an last_name" do 
    Factory.build(:address, :last_name => nil).should_not be_valid 
    end 

    context "last_name" do 
    it "should be invalid with more than 20 chars" do 
     Factory.build(:address, :last_name => "#{'b'*21}").should_not be_valid 
    end 

    it "should be invalid with less than 3 chars" do 
     Factory.build(:address, :last_name => "ll").should_not be_valid 
    end 

    it "should be valid with an valid last_name" do  
     valid_names.each do |name| 
     Factory.build(:address, :last_name => name).should be_valid 
     end 
    end 

    it "should be invalid with an invalid last_name" do 
     invalid_names.each do |name| 
     Factory.build(:address, :last_name => name).should_not be_valid 
     end 
    end  
    end 
def valid_names  
    ["Kai","Ülück's","Schmeißtzs","Rald","Dr. Franzen","rolfes","Lars Michael","Öcück","Mark-Anthony"] 
    end 

    def invalid_names  
    ["-#+*32","   ","a& &lkdf","_-_.l##df"," aaadsa","M€lzer"] 
    end 

Answer 1

所以这里的我有时会做这种事情的方式：

describe Address do 
    describe "validations" do 
    before do 
     @address = Factory(:address) 
    end 
    describe "#first_name" do 
     #prove that your factory is correct 
     it "should be valid" do 
     @address.should be_valid 
     end 
     it "should be less than 20 chars" do 
     @address.name = "0" * 20 
     @address.should_not be_valid 
     end 
     it "should be more than 3 chars" do 
     @address.name = "000" 
     @address.should_not be_valid 
     end 
    end 
    end 
end 

Answer 2

记住，你的测试并不需要是真干。不要为此牺牲可读性。

将您的规格视为例子：哪些示例应该有效，哪些不应该？这也是测试正则表达式的线索：提供一些例子，通过和一些不。

对于验证，我做了一些自定义匹配器，可以找到here。例如：

describe Address do 
    it { should deny(:last_name).to_be(nil, "", "1", "br", "a& &lkdf","_-_.l##df", "lzer") } 
    it { should allow(:last_name).to_be("Kai","Ülück's","Schmeißtzs","Rald","Dr. Franzen","rolfes","Lars Michael","Öcück","Mark-Anthony") } 
end