Question

我正在RSpec中编写模型测试，这是我的代码：

require "spec_helper"

describe User do
before do
  @user = User.new(name: "Ryan", email: "email@email.com", password: "ryan", password_confirmation: "ryan")
end

subject { @user }

describe "Basic model properties" do
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should respond_to(:password) }
  it { should respond_to(:password_confirmation) }
  it { should respond_to(:authenticate) }
  #it { should be_valid }
end

describe "when name is not present" do
  before { @user.name = "" }
  it { should_not be_valid }
end

然而，当我使用bundle exec rspec spec/运行它时，我收到一条错误，说“未定义的方法[]为nil：NilClass在它所说的行it { should_not be valid }。如果我注释掉那行，那么测试通行证。

为什么我会遇到这个问题？

Answer 1

尝试更改

describe "when name is not present" do
  before { @user.name = "" }
  it { should_not be_valid }
end

要

describe "when name is not present" do
  before { subject.name = "" }
  it { should_not be_valid }
end

有关详细信息，请参阅rspec docs https://www.relishapp.com/rspec/rspec-core/v/2-6/docs/subject/explicit-subject#access-subject-from-before-block

另外你可能想看看shoulda-matchers（https://github.com/thoughtbot/shoulda-matchers），然后你就不需要在前一块做任何特别的事情了

describe "Basic model properties" do
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should respond_to(:password) }
  it { should respond_to(:password_confirmation) }
  it { should respond_to(:authenticate) }
  it { should validate_presence_of(:name) }
end

RSpec“should be_valid”未定义

1 个答案: