How to assign variables when using RSpec to test jbuilder views
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06-07-2021 - |
Pergunta
I am trying to write RSpec tests to test the templates I have constructed using jbuilder which ultimately serves up JSON data for my API. I have many tests in spec/controllers
which test my controller functionality, but I am looking to also test that I am rendering the correct JSON fields in my jbuilder views. Here is an example of what I have setup:
# app/views/api/v1/users/create.json.jbuilder
json.first_name user.first_name
# spec/views/api/v1/users/create.json.jbuilder_spec.rb
require 'spec_helper'
describe "api/v1/users/create.json.jbuilder" do
it "renders first_name" do
assign( :user, User.create( :first_name => "Bob" ) )
render
hash = JSON.parse( rendered )
hash.has_json_node( :first_name ).with( "Bob" )
end
end
What I get when I run rspec spec/views/api/v1/users/create.json.jbuilder_spec.rb
is the following error
Failures:
1) api/v1/users/create.json.jbuilder render a user
Failure/Error: render
ActionView::Template::Error:
undefined local variable or method `user' for #<#<Class:0x007fa2911c3118>:0x007fa29105f2b8>
# ./app/views/api/v1/users/create.json.jbuilder:1:in `_app_views_api_v__users_create_json_jbuilder___3806288263594986646_70168098229960'
# ./spec/views/api/v1/users/create.json.jbulder_spec.rb:6:in `block (2 levels) in <top (required)>'
No matter how I have tried to assign/create/pass a user
object to the template, it fails. Any idea what I might be doing wrong?
Solução
After much reading and iteration, this is what works:
require 'spec_helper'
describe "api/v1/users/create.json.jbuilder" do
let( :user ) { User.create( :not_strict => true ) }
it "renders first_name" do
render :template => "api/v1/users/create", :locals => { :user => user }, :formats => :json, :handler => :jbuilder
rendered.should have_json_node( :first_name ).with( user.first_name )
end
end
note: the have_json_node
comes from the api_matchers gem.
Outras dicas
assigns method sets instance variables, your view should be @user.first_name instead of user.first_name, or is that a partial? if it's a partial you should do render :partial => ..., if it's a template you should use @user