I try to practice to making some tests using Rspec and I have a weird comportment. When I try to have an invalid model to follow the Red/Green/Refactor cycle, Rspec doesn't see any error.
I want to ensure release can't have an anterior date.
My model
class Release < ActiveRecord::Base
belongs_to :game
belongs_to :platform
attr_accessible :date
validates :date, presence: true
end
My spec file
require 'spec_helper'
describe Release do
before {#release = Release.new(date: Time.new(2001,2,3))}
it{should respond_to :date}
it{should respond_to :game}
it{should respond_to :platform}
describe "when date is not present" do
before {#release.date = nil}
it {should_not be_valid}
end
describe "when date is anterior" do
before {#release.date = Time.now.prev_month}
it {should_not be_valid}
end
end
My output
.....
Finished in 0.04037 seconds
5 examples, 0 failures
Any idea ?
When you write it { should_not be_valid } you seem to think the receiver is #release (how would rspec know that?), but by default the implicit object is an instance of the class being described:
https://www.relishapp.com/rspec/rspec-core/docs/subject/implicit-receiver
Use subject { some_object } for a explicit subject or it { #release.should_not be_valid }.
More on this:
http://blog.davidchelimsky.net/2012/05/13/spec-smell-explicit-use-of-subject/
Try:
it { #release.should_not be_valid}
instead.
Related
I'm trying to understand why my rspec test isnt working while my actual code to create a new record is.
The error I get is: Failure/Error:
expect {
post "/products/", params: {product: attributes_for(:product)}, as: :json
}.to change(Product, :count).by(1)
expected #count to have changed by 1, but was changed by 0
I tried to actually use the code and it appears to add a new record, but I'm not quite sure why the test is not working. Have I written the test incorrectly?
ProductsController
def create
#p = Product.new(product_params)
#p.save
redirect_to action: :new
end
Product < ApplicationRecord
class Product < ApplicationRecord
validates :title, presence: true #--- Presence
validates :title, length: { minimum: 2 } #--- Minimum 2
validates :title, :description, length: { maximum: 1000 } #--- Maximum 1000
end
ProductSpec
require 'rails_helper'
require 'pp'
RSpec.describe "ProductsRequests", type: :request do
#--- New
describe "#new" do
context "logged in as guest" do
before :each do
get new_product_path
end
it { expect(assigns(:p)).to be_a_new(Product) }
it { expect(response).to render_template :new }
end#--- Guest New
end #--- New
#--- Create
describe "#create" do
context "logged in as guest" do
it "creates new record" do
expect{
post "/products/", params: {product: attributes_for(:product)}
}.to change(Product, :count).by(1)
end
end #--- Guest Create
end #--- Create
The quickest way to debug it would be to change save into save! in your controller.
save tries to save, and returns false if it fails so you probably want to use it and add some handling later (errors are in #p.errors), but for now to quickly see what's going on use save! - it raises an exception if anything (including validations) goes wrong.
I'm creating some test to test a controller and model. When I use FactoryGirl to create fake data I'm getting errors that the User (which the record belongs to) does not exist.
Here is my model composition.rb
class Composition < ActiveRecord::Base
belongs_to :user
belongs_to :group
validates :name, presence: true, uniqueness: {scope: :user_id}
end
Here is my FactoryGirl file composition.rb
require 'faker'
FactoryGirl.define do
factory :composition do
name { Faker::Name.name }
description { Faker::Lorem.words }
import_composition { Faker::Boolean.boolean }
import_composition_file { Faker::File.file_name('path/to') }
end
end
This is my the RSpec test that I have until this far
require 'rails_helper'
describe CompositionsController do
before(:each) do
#user = FactoryGirl.create(:user)
#group = FactoryGirl.create(:group)
sign_in #user
#composition = Composition.new(FactoryGirl.create(:composition), user_id: #user.id, group_id: #group.id)
end
describe "GET #index" do
it "renders the index template" do
get :index
expect(assigns(:composition).to eq(#composition))
expect(response).to render_template("index")
end
end
end
Right now I'm getting an error: Validation failed: User must exist, Group must exist
When I don't user FactoryGirl to create a record everything works fine.
Does any body have an suggestion why it's failing?
You don't need to pass FactoryGirl as a param to Model
#composition = FactoryGirl.create(:composition, user: #user, group: #group)
If you don't want to create the record but just want it to initialize, use build instead of create
#composition = FactoryGirl.build(:composition, user: #user, group: #group)
I have the following (simplified) Rails Concern:
module HasTerms
extend ActiveSupport::Concern
module ClassMethods
def optional_agreement
# Attributes
#----------------------------------------------------------------------------
attr_accessible :agrees_to_terms
end
def required_agreement
# Attributes
#----------------------------------------------------------------------------
attr_accessible :agrees_to_terms
# Validations
#----------------------------------------------------------------------------
validates :agrees_to_terms, :acceptance => true, :allow_nil => :false, :on => :create
end
end
end
I can't figure out a good way to test this module in RSpec however - if I just create a dummy class, I get active record errors when I try to check that the validations are working. Has anyone else faced this problem?
Check out RSpec shared examples.
This way you can write the following:
# spec/support/has_terms_tests.rb
shared_examples "has terms" do
# Your tests here
end
# spec/wherever/has_terms_spec.rb
module TestTemps
class HasTermsDouble
include ActiveModel::Validations
include HasTerms
end
end
describe HasTerms do
context "when included in a class" do
subject(:with_terms) { TestTemps::HasTermsDouble.new }
it_behaves_like "has terms"
end
end
# spec/model/contract_spec.rb
describe Contract do
it_behaves_like "has terms"
end
You could just test the module implicitly by leaving your tests in the classes that include this module. Alternatively, you can include other requisite modules in your dummy class. For instance, the validates methods in AR models are provided by ActiveModel::Validations. So, for your tests:
class DummyClass
include ActiveModel::Validations
include HasTerms
end
There may be other modules you need to bring in based on dependencies you implicitly rely on in your HasTerms module.
I was struggling with this myself and conjured up the following solution, which is much like rossta's idea but uses an anonymous class instead:
it 'validates terms' do
dummy_class = Class.new do
include ActiveModel::Validations
include HasTerms
attr_accessor :agrees_to_terms
def self.model_name
ActiveModel::Name.new(self, nil, "dummy")
end
end
dummy = dummy_class.new
dummy.should_not be_valid
end
Here is another example (using Factorygirl's "create" method" and shared_examples_for)
concern spec
#spec/support/concerns/commentable_spec
require 'spec_helper'
shared_examples_for 'commentable' do
let (:model) { create ( described_class.to_s.underscore ) }
let (:user) { create (:user) }
it 'has comments' do
expect { model.comments }.to_not raise_error
end
it 'comment method returns Comment object as association' do
model.comment(user, "description")
expect(model.comments.length).to eq(1)
end
it 'user can make multiple comments' do
model.comment(user, "description")
model.comment(user, "description")
expect(model.comments.length).to eq(2)
end
end
commentable concern
module Commentable
extend ActiveSupport::Concern
included do
has_many :comments, as: :commentable
end
def comment(user, description)
Comment.create(commentable_id: self.id,
commentable_type: self.class.name,
user_id: user.id,
description: description
)
end
end
and restraunt_spec may look something like this (I'm not Rspec guru so don't think that my way of writing specs is good - the most important thing is at the beginning):
require 'rails_helper'
RSpec.describe Restraunt, type: :model do
it_behaves_like 'commentable'
describe 'with valid data' do
let (:restraunt) { create(:restraunt) }
it 'has valid factory' do
expect(restraunt).to be_valid
end
it 'has many comments' do
expect { restraunt.comments }.to_not raise_error
end
end
describe 'with invalid data' do
it 'is invalid without a name' do
restraunt = build(:restraunt, name: nil)
restraunt.save
expect(restraunt.errors[:name].length).to eq(1)
end
it 'is invalid without description' do
restraunt = build(:restraunt, description: nil)
restraunt.save
expect(restraunt.errors[:description].length).to eq(1)
end
it 'is invalid without location' do
restraunt = build(:restraunt, location: nil)
restraunt.save
expect(restraunt.errors[:location].length).to eq(1)
end
it 'does not allow duplicated name' do
restraunt = create(:restraunt, name: 'test_name')
restraunt2 = build(:restraunt, name: 'test_name')
restraunt2.save
expect(restraunt2.errors[:name].length).to eq(1)
end
end
end
Building on Aaron K's excellent answer here, there are some nice tricks you can use with described_class that RSpec provides to make your methods ubiquitous and make factories work for you. Here's a snippet of a shared example I recently made for an application:
shared_examples 'token authenticatable' do
describe '.find_by_authentication_token' do
context 'valid token' do
it 'finds correct user' do
class_symbol = described_class.name.underscore
item = create(class_symbol, :authentication_token)
create(class_symbol, :authentication_token)
item_found = described_class.find_by_authentication_token(
item.authentication_token
)
expect(item_found).to eq item
end
end
context 'nil token' do
it 'returns nil' do
class_symbol = described_class.name.underscore
create(class_symbol)
item_found = described_class.find_by_authentication_token(nil)
expect(item_found).to be_nil
end
end
end
end
I have the following validator:
# Source: http://guides.rubyonrails.org/active_record_validations_callbacks.html#custom-validators
# app/validators/email_validator.rb
class EmailValidator < ActiveModel::EachValidator
def validate_each(object, attribute, value)
unless value =~ /^([^#\s]+)#((?:[-a-z0-9]+\.)+[a-z]{2,})$/i
object.errors[attribute] << (options[:message] || "is not formatted properly")
end
end
end
I would like to be able to test this in RSpec inside of my lib directory. The problem so far is I am not sure how to initialize an EachValidator.
I am not a huge fan of the other approach because it ties the test too close to the implementation. Also, it's fairly hard to follow. This is the approach I ultimately use. Please keep in mind that this is a gross oversimplification of what my validator actually did... just wanted to demonstrate it more simply. There are definitely optimizations to be made
class OmniauthValidator < ActiveModel::Validator
def validate(record)
if !record.omniauth_provider.nil? && !%w(facebook github).include?(record.omniauth_provider)
record.errors[:omniauth_provider] << 'Invalid omniauth provider'
end
end
end
Associated Spec:
require 'spec_helper'
class Validatable
include ActiveModel::Validations
validates_with OmniauthValidator
attr_accessor :omniauth_provider
end
describe OmniauthValidator do
subject { Validatable.new }
context 'without provider' do
it 'is valid' do
expect(subject).to be_valid
end
end
context 'with valid provider' do
it 'is valid' do
subject.stubs(omniauth_provider: 'facebook')
expect(subject).to be_valid
end
end
context 'with unused provider' do
it 'is invalid' do
subject.stubs(omniauth_provider: 'twitter')
expect(subject).not_to be_valid
expect(subject).to have(1).error_on(:omniauth_provider)
end
end
end
Basically my approach is to create a fake object "Validatable" so that we can actually test the results on it rather than have expectations for each part of the implementation
Here's a quick spec I knocked up for that file and it works well. I think the stubbing could probably be cleaned up, but hopefully this will be enough to get you started.
require 'spec_helper'
describe 'EmailValidator' do
before(:each) do
#validator = EmailValidator.new({:attributes => {}})
#mock = mock('model')
#mock.stub('errors').and_return([])
#mock.errors.stub('[]').and_return({})
#mock.errors[].stub('<<')
end
it 'should validate valid address' do
#mock.should_not_receive('errors')
#validator.validate_each(#mock, 'email', 'test#test.com')
end
it 'should validate invalid address' do
#mock.errors[].should_receive('<<')
#validator.validate_each(#mock, 'email', 'notvalid')
end
end
I would recommend creating an anonymous class for testing purposes such as:
require 'spec_helper'
require 'active_model'
require 'email_validator'
RSpec.describe EmailValidator do
subject do
Class.new do
include ActiveModel::Validations
attr_accessor :email
validates :email, email: true
end.new
end
describe 'empty email addresses' do
['', nil].each do |email_address|
describe "when email address is #{email_address}" do
it "does not add an error" do
subject.email = email_address
subject.validate
expect(subject.errors[:email]).not_to include 'is not a valid email address'
end
end
end
end
describe 'invalid email addresses' do
['nope', '#', 'foo#bar.com.', '.', ' '].each do |email_address|
describe "when email address is #{email_address}" do
it "adds an error" do
subject.email = email_address
subject.validate
expect(subject.errors[:email]).to include 'is not a valid email address'
end
end
end
end
describe 'valid email addresses' do
['foo#bar.com', 'foo#bar.bar.co'].each do |email_address|
describe "when email address is #{email_address}" do
it "does not add an error" do
subject.email = email_address
subject.validate
expect(subject.errors[:email]).not_to include 'is not a valid email address'
end
end
end
end
end
This will prevent hardcoded classes such as Validatable, which could be referenced in multiple specs, resulting in unexpected and hard to debug behavior due to interactions between unrelated validations, which you are trying to test in isolation.
Inspired by #Gazler's answer I came up with the following; mocking the model, but using ActiveModel::Errors as errors object. This slims down the mocking quite a lot.
require 'spec_helper'
RSpec.describe EmailValidator, type: :validator do
subject { EmailValidator.new(attributes: { any: true }) }
describe '#validate_each' do
let(:errors) { ActiveModel::Errors.new(OpenStruct.new) }
let(:record) {
instance_double(ActiveModel::Validations, errors: errors)
}
context 'valid email' do
it 'does not increase error count' do
expect {
subject.validate_each(record, :email, 'test#example.com')
}.to_not change(errors, :count)
end
end
context 'invalid email' do
it 'increases the error count' do
expect {
subject.validate_each(record, :email, 'fakeemail')
}.to change(errors, :count)
end
it 'has the correct error message' do
expect {
subject.validate_each(record, :email, 'fakeemail')
}.to change { errors.first }.to [:email, 'is not an email']
end
end
end
end
One more example, with extending an object instead of creating new class in the spec. BitcoinAddressValidator is a custom validator here.
require 'rails_helper'
module BitcoinAddressTest
def self.extended(parent)
class << parent
include ActiveModel::Validations
attr_accessor :address
validates :address, bitcoin_address: true
end
end
end
describe BitcoinAddressValidator do
subject(:model) { Object.new.extend(BitcoinAddressTest) }
it 'has invalid bitcoin address' do
model.address = 'invalid-bitcoin-address'
expect(model.valid?).to be_falsey
expect(model.errors[:address].size).to eq(1)
end
# ...
end
Using Neals great example as a basis I came up with the following (for Rails and RSpec 3).
# /spec/lib/slug_validator_spec.rb
require 'rails_helper'
class Validatable
include ActiveModel::Model
include ActiveModel::Validations
attr_accessor :slug
validates :slug, slug: true
end
RSpec.describe SlugValidator do
subject { Validatable.new(slug: slug) }
context 'when the slug is valid' do
let(:slug) { 'valid' }
it { is_expected.to be_valid }
end
context 'when the slug is less than the minimum allowable length' do
let(:slug) { 'v' }
it { is_expected.to_not be_valid }
end
context 'when the slug is greater than the maximum allowable length' do
let(:slug) { 'v' * 64 }
it { is_expected.to_not be_valid }
end
context 'when the slug contains invalid characters' do
let(:slug) { '*' }
it { is_expected.to_not be_valid }
end
context 'when the slug is a reserved word' do
let(:slug) { 'blog' }
it { is_expected.to_not be_valid }
end
end
If it's possible to not use stubs I would prefer this way:
require "rails_helper"
describe EmailValidator do
let(:user) { build(:user, email: email) } # let's use any real model
let(:validator) { described_class.new(attributes: [:email]) } # validate email field
subject { validator.validate(user) }
context "valid email" do
let(:email) { "person#mail.com" }
it "should be valid" do
# with this expectation we isolate specific validator we test
# and avoid leaking of other validator errors rather than with `user.valid?`
expect { subject }.to_not change { user.errors.count }
expect(user.errors[:email]).to be_blank
end
end
context "ivalid email" do
let(:email) { "invalid.com" }
it "should be invalid" do
expect { subject }.to change { user.errors.count }
# Here we can check message
expect(user.errors[:email]).to be_present
expect(user.errors[:email].join(" ")).to include("Email is invalid")
end
end
end
Given I have the following class
class listing > ActiveRecord::Base
attr_accessible :address
belongs_to :owner
validates :owner_id, presence: true
validates :address, presence: true
end
Is there a way I can get away with not having to keep associating an owner before I save a listing in my tests in /spec/models/listing_spec.rb, without making owner_id accessible through mass assignment?
describe Listing do
before(:each) do
#owner = Factory :owner
#valid_attr = {
address: 'An address',
}
end
it "should create a new instance given valid attributes" do
listing = Listing.new #valid_attr
listing.owner = #owner
listing.save!
end
it "should require an address" do
listing = Listing.new #valid_attr.merge(:address => "")
listing.owner = #owner
listing.should_not be_valid
end
end
No need to use factory-girl (unless you want to...):
let(:valid_attributes) { address: 'An Address', owner_id: 5}
it "creates a new instance with valid attributes" do
listing = Listing.new(valid_attributes)
listing.should be_valid
end
it "requires an address" do
listing = Listing.new(valid_attributes.except(:address))
listing.should_not be_valid
listing.errors(:address).should include("must be present")
end
it "requires an owner_id" do
listing = Listing.new(valid_attributes.except(:owner_id))
listing.should_not be_valid
listing.errors(:owner_id).should include("must be present")
end
There is if you use factory-girl
# it's probably not a good idea to use FG in the first one
it "should create a new instance given valid attributes" do
listing = Listing.new #valid_attr
listing.owner = #owner
listing.property_type = Factory(:property_type)
listing.save!
end
it "should require an address" do
# But here you can use it fine
listing = Factory.build :listing, address: ''
listing.should_not be_valid
end
it "should require a reasonable short address" do
listing = Factory.build :listing, address: 'a'*245
listing.should_not be_valid
end
I hate to be the voice of dissent here, but you shouldn't be calling save! or valid? at all in your validation spec. And 9 times out of 10, if you need to use factory girl just to check the validity of your model, something is very wrong. What you should be doing is checking for errors on each of the attributes.
A better way to write the above would be:
describe Listing do
describe "when first created" do
it { should have(1).error_on(:address) }
it { should have(1).error_on(:owner_id) }
end
end
Also, chances are you don't want to be checking for the presence of an address, you want to check that it is not nil, not an empty string, and that it is not longer than a certain length. You'll want to use validates_length_of for that.