bypass doorkeeper for rspec testing of controller

test_spec.rb

# Note: this test shows a context of after we authenticate

require "rails_helper"

RSpec.describe API::V1::Foobar, type: :controller do
  let(:api_user) { create :api_user }

  before do
    allow(controller).to receive(:doorkeeper_token)
      .and_return(instance_double("AccessToken", acceptable?: true, resource_owner_id: api_user.id))
  end

  describe "POST :create" do
    context "without all params" do
      it "Fails with a HTTP 400" do
        post(:create, params: { program_enrollment: { some_attribute: "value" } })
        expect(response.code.to_i).to eq(400)
      end
    end
  end
end