Passing Two Parameters on a JSON POST Request in Rspec

What you are looking for is Hash.merge(other_hash). You might want to do some reading on the Hash class since about 50% of Ruby programming is about hash manipulation (IMHO).

This is how you would use it in your spec:

require 'spec_helper' # You don't need to put the spec inside your module! # It just makes it harder to read! describe Api::V1::ProductsController, type: :controller do before do @api_app = FactoryGirl.create(:api_app, request_origin: "0.0.0.0") @store = FactoryGirl.create(:store) end after(:all) do Product.all.each {|l| l.destroy} ApiApp.all.each {|a| a.destroy} end describe "POST 'create' " do # DRY up the parameters let(:params){ access_token: @api_app.access_token format: 'json' } # Even better is to use fixures or factories for this. let(:product_params) { first_name:"Hello", last_name:"You", email:"[email protected]", street1:"103 ABC Street", city:"Pittsburgh", phone:"4125361111", store_id:@store.id, state:"CA", country:"United States", organization:"ABC" } context "Creates a product with the correct parameters" do it "returns a successful response string with success message" do product = product_params.merge(organization_type: "Org") post :create, params.merge(product: product) expect(response).to be_success expect(response.body).to include("Product created") end end context "Incorrect parameters to create a product" do it "returns a failure response when a parameter is missing" do product = product_params.merge(organization_type: "ABC") post :create, params.merge(product: product) expect(response).to be_success expect(response.body).to include("Product failed to create") end end end end 

However your spec contains an misstake:

context "Incorrect parameters to create a product" do it "returns a failure response when a parameter is missing" do product = product_params.merge(organization_type: "ABC") post :create, params.merge(product: product) expect(response).to be_success #! it should not be a success! end end 

expect(response).to be_success actually means that the response should have the 200 OK HTTP response code - but you should be returning a 400 Bad Request if there is missing parameter. The correct expectation is:

expect(response).to have_http_status :bad_request