Testing Create Action in Rails Controller - ruby-on-rails

Question

Testing Rails 4 Application with RSpec 3 throws an Argument Error (2 for 0) when running a test on posts#create.
My controller:
def create
#post = Post.new(post_params)
respond_to do |format|
if #post.save
format.html { redirect_to(#post,
:notice => 'Post was successfully created.') }
format.json { render :json => #post,
:status => :created, :location => #post }
else
format.html { render :action => "new" }
format.json { render :json => #post.errors,
:status => :unprocessable_entity }
end
end
end
private
def post_params
params.require(:post).permit(:title, :body)
end
My Routes:
resources :posts
My Test:
describe 'POST posts#create' do
it 'allows admin to create a new post' do
sign_out user
sign_in admin
post :create, post: { title: 'Title', body: 'Body' }
expect(response).to have_http_status(:success)
end
end
The problem is on the post :create... line of the controller test. I'm unsure of why it is not running correctly. Solutions I have attempted:
1 post :create, post: title: 'Title', body: 'Body'
Thinking there was something wrong about my syntax. This however, throws an error.
2 post :create, { title: 'Title', body: 'Body' }
I thought that the post might be implicit since it is the name of the controller. No dice.
3 post :create, post:(post_params)
Again, I thought that because I have set up the usual permitted params, that they would be necessary. Not surprisingly, the test doesn't have post_params in its current scope.
4 post :create, post: { admin: { title: 'Title', body: 'Body' } }
I had before read that you have to pass in the user creating the post item. Incorrect.
5 post :create=> { title: 'Title', body: 'Body' }
I thought it might be the case that posting implicitly creates a post because that is the controller. However, it returns the argument error.
6 post :post=> { title: 'Title', body: 'Body' }
Finally, I thought that I have to post a new post a give the parameters without having to use the create action.
Edit - 7 post(:create, post: { title: 'Title', body: 'Body' })
After reviewing the API docs (http://api.rubyonrails.org/classes/ActionController/TestCase.html), I thought this would work but it's still the same argument error.
8
describe 'POST admin#create' do
it 'allows admin to create a new post' do
sign_in admin
expect{
post :create, post: {title: 'Title', body: 'Body' }
}.to change(Post, :count).by(1)
end
end
I attempted to use expect as a block thinking that it would pick up the arguments. Nope.
Compromise Solution
describe 'POST admin#create' do
it 'allows admin to create a new post' do
sign_in admin
expect{
Post.create({title: 'Title', body: 'Body' })
}.to change(Post, :count).by(1)
end
end
I think the name of the action being the name of the controller threw RSpec off. So, instead I just manually created a post. Probably not the recommended solution.
None of these worked. What am I missing?
Error Output
Failure/Error: post(:create, post: { title: 'Title', body: 'Body' })
ArgumentError:
wrong number of arguments (2 for 0)
# ./spec/controllers/posts_controller_spec.rb:101:in `block (3 levels) in <top (required)>'
I have also taken off all of my before_filters in order to see if that was the problem, however, it gives the same error.

Answer 1

Your syntax looks correct. It would look like this:
describe 'POST admin#create' do
it 'allows admin to create a new post' do
sign_out user
sign_in admin
post(:create, {post: {title: 'Title', body: 'Body'}})
expect(response).to have_http_status(:success)
end
end
...but the parens and outer curlys are optional.
The error is not coming from your test. The error occurs during the post to :create. It is coming from inside the controller or the model during the :create request.