create tests for initiating recurring donation in store_controller#pr…

…ocess_donation

spec/controllers/store_controller_spec.rb

@@ -101,6 +101,36 @@
     end
   end
 
+  describe 'initiating a recurring donation' do
+    before :each do
+      @customer = create(:customer)
+    end
+    let (:monthly_donation_attempt) {
+      post :process_donation,
+      {:customer_id => @customer.id, :donation => 5, :donation_frequency => 'monthly', :credit_card_token => 'dummy'}
+    }
+    context 'when donation completes successful' do
+      before :each do
+        allow(Stripe::Charge).to receive(:create).and_return(double("Stripe::Charge", id: 1))
+      end
+      it 'creates a new RecurringDonation record' do
+        expect{monthly_donation_attempt}.to change {RecurringDonation.count}.by(1)
+      end
+      it 'adds a foreign key to the corresponding first donation instance' do
+        monthly_donation_attempt
+        expect(Donation.find(1).recurring_donation_id).to equal(RecurringDonation.find(1).id)
+      end
+    end
+    context 'when donation completes unsuccessfully' do
+      before :each do
+        allow(Stripe::Charge).to receive(:create).and_raise(Stripe::StripeError)
+      end
+      it 'does not create new RecurringDonation record if order fails to finalize' do
+        expect{monthly_donation_attempt}.to change {RecurringDonation.count}.by(0)
+      end
+    end
+  end
+
   describe 'quick donation with nonexistent customer' do
     before :each do
       @new_valid_customer = attributes_for(:customer).except(:password,:password_confirmation)