Rails模型测试

Question

Hello I am using rspec to test my user model. I just wanted to know if what I am doing is a common practice in testing. To test for error messages I am doing something like this

    User.create!(users(:first))
    user.update_attributes  email: 'IDon\'tThinkThisIsAValidEmail' 
    user.should_not be_valid
    assert user.errors.messages.include? :email

Also how would I go about testing for duplicates? Calling full_messages and testing for "Email has already been taken" message? Is this a good practice. I am doing tests this way because before my should_not be_valid tests were passing because the username was invalid so that was no good. IS what I am doing a good idea? Any better ways of testing?

Answer 1

You should check out the shoulda gem , which has a suite of useful test assertions, including for uniqueness validations:

describe User do
  should validate_uniqueness_of(:email)
end

Edit: Here's a link to the docs as a great place to start .

Answer 2

For validating the format of an email you can do something like the following. Note that you don't have to create a user record or use fixtures for writing most validation specs.

    it "will not allow invalid email addresses" do
      user = User.new(email: 'notAValidEmail')
      user.should have(1).error_on(:email)
    end

    it "will allow valid email addresses" do
      user = User.new(email: 'valid@email.com')
      user.should have(:no).errors_on(:email)
    end

For validating presence you can do this:

    it { should validate_presence_of(:email) }

You can see the rspec documentation for more examples:

https://www.relishapp.com/rspec/rspec-rails/v/2-3/docs/model-specs/errors-on