How to do Integration Test create through other model - ruby-on-rails

Question

1) I have this model Job and the model institution
class Job < ApplicationRecord
belongs_to :institution
# others attibutes
end
2) This is my action create on JobsController - I need a institution to create a job. it is fine.
def create
build_job
save_job || render(:new, status: :unprocessable_entity)
end
3) This is the integration test that I created
I am not getting the success test
In params
-I also tried institution: #institution
-and also tried institution_id: #institution.id
require 'test_helper'
class JobActionsTest < ActionDispatch::IntegrationTest
setup do
#user = users(:standard)
sign_in #user
#institution = institutions(:standard)
end
test "can create a job through institution" do
get new_institution_job_path(#institution)
assert_response :success
assert_difference('Job.count') do
post jobs_path,
params: {job: {title: "Desenvolvedor", description: "Ruby",
requirements: "rspec and capybara",
start_date: Date.today,
end_date: Date.today + 5.days,
institution: #institution.id}}
end
assert_response :redirect
follow_redirect!
assert_response :success
end
end
4) And this is my console error
#Running:
E
Error:
JobActionsTest#test_can_create_a_job_through_institution:
ActiveRecord::RecordNotFound: Couldn't find Institution with 'id'=
app/controllers/jobs_controller.rb:74:in `job_scope'
app/controllers/jobs_controller.rb:52:in `build_job'
app/controllers/jobs_controller.rb:18:in `create'
test/integration/job_actions_test.rb:22:in `block (2 levels) in <class:JobActionsTest>'
test/integration/job_actions_test.rb:21:in `block in <class:JobActionsTest>'
bin/rails test test/integration/job_actions_test.rb:17

Answer 1

Start by nesting the jobs resource properly:
resources :institutions do
resources :jobs, only: [:new, :create]
end
# or to create the full suite
resources :institutions do
resources :jobs, shallow: true
end
This will give these routes:
Prefix Verb URI Pattern Controller#Action
institution_jobs POST /institutions/:institution_id/jobs(.:format) jobs#create
new_institution_job GET /institutions/:institution_id/jobs/new(.:format) jobs#new
...
Note that :institution_id is a now a part of URI pattern for the create route, and it will be available as params[:institution_id].
In your test you want to POST to /institutions/:institution_id/jobs:
require 'test_helper'
class JobActionsTest < ActionDispatch::IntegrationTest
setup do
#user = users(:standard)
sign_in #user
#institution = institutions(:standard)
end
# Use separate examples per route / case
test "can fill in form to create a new job" do
get new_institution_job_path(#institution)
assert_response :success
end
test "can create a job through institution" do
assert_difference ->{ #institution.jobs.count } do
post institution_jobs_path(#institution),
params: {
job: {
title: "Desenvolvedor",
description: "Ruby",
requirements: "rspec and capybara",
start_date: Date.today,
end_date: Date.today + 5.days
}
}
end
assert_redirected_to #institution.jobs.last
follow_redirect!
assert_response :success
end
end
Further you want to test that the job actually was created for the right institution. We do that by passing the lambda ->{ #institution.jobs.count }.
And that the users are redirected to the correct resource - not just somewhere - which is done with assert_redirected_to #institution.jobs.last.

Answer 2

It looks like that when you call at line 22
get new_institution_job_path(#institution)
the #institution object you have built in the setup block is not saved in the database.
The error you are receiving, ActiveRecord::RecordNotFound, says that it cannot be found an Institution with id nil.
You can easily check if I am guessing correctly by adding this assertion:
test "can create a job through institution" do
assert_not_nil(#institution.id) # or assert_not_equal(0, Institution.where(id: #institution.id).size)
get new_institution_job_path(#institution)
assert_response :success
#...
end
Make sure that your institutions(:standard) method looks like Institution.create!() and not like Institution.new or Institution.build