How to expect a Params hash in RSpec in Rails 5? - ruby-on-rails

Question

I'm upgrading to Rails 5, which has broken my RSpec even though I'm passing the data I should be.
The problem is obviously here:
expected: ({"name"=>"MyString"})
got: (<ActionController::Parameters {"name"=>"MyString"} permitted: true>)
Which means I need to be able to fix my controller assertion so that it expects the latter. This is the line that needs changing.
expect_any_instance_of(Hospital).to receive(:update).with({ "name" => "MyString" })
Probably to something like this
expect_any_instance_of(Hospital).to receive(:update).with(params: { "name" => "MyString" }, permitted: true)
I just don't know what the syntax is, and can't find it anywhere in the scattered documentation for Rails 5, or non existent notes/Stack Overflow questions concerning RSpec on Rails 5.
Full error and controller spec
2) HospitalsController PUT update with valid params updates the requested hospital
Failure/Error: if #hospital.update(hospital_params)
#<Hospital id: 43, name: "MyString", reference_code: "RefCod", image_file_name: nil, image_content_type: nil, image_file_size: nil, image_updated_at: nil, contact_phone: "[phone]", website_link: "www.example.com", street_number: "01", street: "Somewhere St", suburb: "Suburb", state: "ACT", postcode: "1111", description: "MyText MyText MyText MyText MyText MyText MyText M...", areas_of_specialization: "MyText MyText MyText MyText MyText MyText MyText M...", created_at: "2016-07-24 22:28:24", updated_at: "2016-07-24 22:28:24"> received :update with unexpected arguments
expected: ({"name"=>"MyString"})
got: (<ActionController::Parameters {"name"=>"MyString"} permitted: true>)
Diff:
## -1,2 +1,2 ##
-[{"name"=>"MyString"}]
+[<ActionController::Parameters {"name"=>"MyString"} permitted: true>]
# ./app/controllers/hospitals_controller.rb:54:in `block in update'
Controller spec method
describe "PUT update" do
describe "with valid params" do
it "updates the requested hospital" do
hospital = Hospital.create! valid_attributes
# Assuming there are no other hospitals in the database, this
# specifies that the Hospital created on the previous line
# receives the :update_attributes message with whatever params are
# submitted in the request.
expect_any_instance_of(Hospital).to receive(:update).with({ "name" => "MyString" })
put :update, {:id => hospital.to_param, :hospital => { "name" => "MyString" }}, valid_session
end
it "assigns the requested hospital as #hospital" do
hospital = Hospital.create! valid_attributes
put :update, {:id => hospital.to_param, :hospital => valid_attributes}, valid_session
expect(assigns(:hospital)).to eq(hospital)
end
it "redirects to the hospital" do
hospital = Hospital.create! valid_attributes
put :update, {:id => hospital.to_param, :hospital => valid_attributes}, valid_session
expect(response).to redirect_to(hospital)
end
end
...etc

Answer 1

Have you tried just using a ActionController::Parameters object as the value you're expecting?
As in:
expect_any_instance_of(Hospital).to receive(:update).with(ActionController::Parameters.new('name':'MyString'))