Question

我有以下规格：

describe Country do

  let (:country) { Country.new(:country_code => "NL", :name => "Netherlands") }

  context "when country code is empty" do
  let (:country) { Country.new(:name => "Netherlands") }

    it "should not be valid" do
      expect(country.valid?).to be_falsey
    end
    it "should not save" do
      expect(country.save).to be_falsey
    end    
  end

  context "when country code is not empty" do
    let (:country) { Country.new(:country_code => "NL") }

    it "should be valid" do
      expect(country.valid?).to be_truthy
    end

    it "should save" do
      expect(country.save).to be_truthy
    end
  end

  context "when name is empty" do
    it "should not be valid" do
      expect(country.valid?).to be_falsey
    end

    it "should not save" do
      expect(country.save).to be_falsey
    end
  end


end


end

我想要实现的目标是“取消设置”。 let方法中的属性。理想情况下，我想：

let (:country) { country.country_code = nil }

我想这样做，因为我想测试Country的SINGLE属性的存在（和NON存在），同时保持其他属性设置。

Answer 1

对于应在任何it之前执行的特定操作，您必须使用before hook块，并将:all密钥传递给该方法。它允许为上下文块准备一次测试：

describe "when country code is not empty" do
   before(:all) { country.country_code = nil }
   # ...
end

注意我对describe使用了context个关键字。但是：

根据rspec源代码，“context”只是“describe”的别名方法......

“describe”的目的是针对一个功能包装一组测试，而“context”是针对同一状态下的一个功能包装一组测试。

describe与context中的更多信息，您可以阅读文章：Describe vs. Context in RSpec。

您也可以使用before context阻止：

before(:context) { country.country_code = nil }

context "when country code is not empty" do
   # ...
end

Answer 2

有很多方法可以做到这一点。

您可以在每个上下文中使用#before：

before do country.code = nil #change this in another context to a non-empty code end
或者，您可以更改您的顶级权限以引用country_code let，如下所示：

let (:country) { Country.new(:country_code => country_code, :name => "Netherlands") }

#immediately after context "when country code is empty" let(:country_code) { nil }

..... #immediately after: context "when country code is not empty" do let (:country_code) { "NL" }

如果您的context "when name is empty需要country_code，请将顶级代码定义为默认代码。

因此，您的代码可能如下所示：

  describe Country do

  let (:country) { Country.new(:country_code => country_code, :name => "Netherlands") }
  let(:country_code) { "NL" } #default

  context "when country code is empty" do
    let (:country_code) { nil } 

    it "should not be valid" do
      expect(country.valid?).to be_falsey
    end
    it "should not save" do
      expect(country.save).to be_falsey
    end    
  end

  context "when country code is not empty" do
    let (:country_code) {  "NL" }

    it "should be valid" do
      expect(country.valid?).to be_truthy
    end

    it "should save" do
      expect(country.save).to be_truthy
    end
  end

  context "when name is empty" do
    it "should not be valid" do
      expect(country.valid?).to be_falsey
    end

    it "should not save" do
      expect(country.save).to be_falsey
    end
  end


end


end

rspec let，如何取消设置属性

2 个答案: