Using rspec to test an API endpoint - ruby-on-rails

Question

I have this api endpoint wot get all the blogs from my database that works id the user pass an api_key. This works correctly and now I'm trying to testing this endpoint.
Routes:
Rails.application.routes.draw do
get 'blogs', to: 'blogs#index'
end
Blogs controller:
class BlogsController < ApplicationController
def index
if params[:api_key]
user = User.find_by(api_key: params[:api_key])
if user.present?
#blogs = Blog.all
return render json: #blogs, status: :ok
end
end
render json: { error: "Unauthorized!" }, status: :bad_request
end
end
I'm new to rspec and tests in general, I watched a couple videos and tutorials and this is what I have so far:
spec/requests/blogs_spec.rb
require 'rails_helper'
RSpec.describe 'Blogs API', type: :request do
let!(:blogs) { Blog.limit(10) }
describe 'GET /blogs' do
before { get '/blogs' }
it 'returns status code 400' do
expect(response).to have_http_status(400)
end
context 'when the request is valid' do
before { get '/blogs', params: { api_key: '123123'} }
it 'returns status code 400' do
expect(response).to have_http_status(200)
end
end
end
end
I can't seem to make the last test work and I don't know why. My guess is that I'm not passing api_key correctly, but I don't know how
1) Blogs API GET /blogs when the request is valid returns status code 400
Failure/Error: expect(response).to have_http_status(200)
expected the response to have status code 200 but it was 400
# ./spec/requests/blogs_spec.rb:28:in `block (4 levels) in <top (required)>'

Answer 1

Ok, so accordingly to your question + comments, I can assume you are running your tests within test environment, but you are expecting to find a User existing in development database.
FactoryBot
You might wanna use FactoryBot to create records for your testing suite.
Add to your Gemfile:
group :development, :test do
gem 'factory_bot_rails'
end
In rails_helper.rb, add:
RSpec.configure do |config|
config.include FactoryBot::Syntax::Methods
end
Now you should create your User factory. Create a new file spec/factories/user.rb with the following:
FactoryBot.define do
factory :user do
api_key { '123123' }
# You should define every any other required attributes here so record can be created
end
end
Finally, in your spec file:
....
context 'when the request is valid' do
before { get '/blogs', params: { api_key: user.api_key} }
let!(:user) { create(:user) }
it 'returns status code 200' do
expect(response).to have_http_status(200)
end
end
...
Now your test should pass. Notice that in testing database there is no Blog created also, so:
let!(:blogs) { Blog.limit(10) }
Will return an empty array. You will need to create a Blog factory too, and create blogs like:
let!(:blogs) { create_list(:blog, 2) }
Bonus
As soon as you start improving your tests, you may wanna take a look at Faker and Database Cleaner for ActiveRecord