Write tests for actions

Write Tests for Actions

RSpec.describe Api::ProductsController, type: :controller do

...

  describe '#index.json' do
    before { get :index, format: :json }

    it { should render_template :index }
  end

  describe '#show.json' do
    before { get :show, id: 1, format: :json }

    it { should render_template :show }
  end

  describe '#collection' do
    before { expect(Product).to receive(:all) }

    it { expect { subject.send :collection }.to_not raise_error }
  end

  describe '#resource' do
    before { expect(subject).to receive(:params).and_return({ id: 1 }) }

    before { expect(Product).to receive(:find).with(1) }

    it { expect { subject.send :resource }.to_not raise_error }
  end
end