Copy spec from solidus_paypal_commerce_platform

None of the paypal controllers in this extension had tests, which is
causing the code coverage to be under the solidus required limit.
This should get us to the minimum 89% code coverage to get the build
green.

Co-authored-by: Adam Mueller <adam@super.gd>
Co-authored-by: Alistair Norman <alistair@super.gd>
Co-authored-by: Noah Silvera <noah@super.gd>

Author: 4 people

storefront/templates/spec/solidus_storefront_spec_helper.rb

@@ -18,6 +18,8 @@
 require "spree/testing_support/order_walkthrough"
 require "spree/testing_support/translations"
 
+require "solidus_paypal_commerce_platform/testing_support/factories"
+
 # Define the namespace for the helpers.
 module SolidusStorefront; end
 

storefront/templates/spec/system/paypal_spec.rb

@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+
+require "solidus_storefront_spec_helper"
+
+RSpec.describe "Checkout" do
+  def js_sdk_script_query
+    URI(page.find('script[src*="sdk/js?"]', visible: false)[:src]).query.split('&')
+  end
+
+  def js_sdk_script_partner_id
+    page.find('script[src*="sdk/js?"]', visible: false)['data-partner-attribution-id']
+  end
+
+  describe "paypal payment method" do
+    let(:order) { Spree::TestingSupport::OrderWalkthrough.up_to(:payment) }
+    let(:paypal_payment_method) { create(:paypal_payment_method) }
+    let(:failed_response) { double('response', status_code: 500) } # rubocop:disable RSpec/VerifiedDoubles
+
+    before do
+      user = create(:user)
+      visit '/'
+      click_link 'Login'
+      fill_in 'spree_user[email]', with: user.email
+      fill_in 'spree_user[password]', with: 'secret'
+      click_button 'Login'
+      order.user = user
+      order.recalculate
+
+      paypal_payment_method
+      allow_any_instance_of(CheckoutsController).to receive_messages(
+        current_order: order, try_spree_current_user: user
+      )
+    end
+
+    context "when generating a script tag" do
+      it "generates a url with the correct credentials attached" do
+        visit '/checkout/payment'
+        expect(js_sdk_script_query).to include("client-id=#{paypal_payment_method.preferences[:client_id]}")
+      end
+
+      it "generates a partner_id attribute with the correct partner code attached" do
+        visit '/checkout/payment'
+        expect(js_sdk_script_partner_id).to eq("Solidus_PCP_SP")
+      end
+
+      it "generates a URL with the correct currency" do
+        allow(order).to receive(:currency).and_return "EUR"
+        visit '/checkout/payment'
+        expect(js_sdk_script_query).to include("currency=EUR")
+      end
+
+      context "when auto-capture is set to true" do
+        it "generates a url with intent capture" do
+          paypal_payment_method.update(auto_capture: true)
+          visit '/checkout/payment'
+          expect(js_sdk_script_query).to include("client-id=#{paypal_payment_method.preferences[:client_id]}")
+          expect(js_sdk_script_query).to include("intent=capture")
+        end
+      end
+    end
+
+    context "when no payment has been made" do
+      it "fails to process" do
+        visit '/checkout/payment'
+        choose(option: paypal_payment_method.id)
+        click_button("Save and Continue")
+        expect(page).to have_content("Payments source PayPal order can't be blank")
+      end
+    end
+
+    context "when a payment has been made" do
+      it "proceeds to the next step" do
+        visit '/checkout/payment'
+        choose(option: paypal_payment_method.id)
+        find(:xpath, "//input[@id='payments_source_paypal_order_id']", visible: false).set SecureRandom.hex(8)
+        click_button("Save and Continue")
+        expect(page).to have_css(".current", text: "Confirm")
+      end
+
+      it "records the paypal email address" do
+        visit '/checkout/payment'
+        choose(option: paypal_payment_method.id)
+        find(:xpath, "//input[@id='payments_source_paypal_order_id']", visible: false).set SecureRandom.hex(8)
+        find(:xpath, "//input[@id='payments_source_paypal_email']", visible: false).set "fake@email.com"
+        click_button("Save and Continue")
+        expect(Spree::Payment.last.source.paypal_email).to eq "fake@email.com"
+      end
+
+      it "records the paypal funding source" do
+        visit '/checkout/payment'
+        choose(option: paypal_payment_method.id)
+        find(:xpath, "//input[@id='payments_source_paypal_order_id']", visible: false).set SecureRandom.hex(8)
+        find(:xpath, "//input[@id='payments_source_paypal_email']", visible: false).set "fake@email.com"
+        find(:xpath, "//input[@id='payments_source_paypal_funding_source']", visible: false).set "venmo"
+        click_button("Save and Continue")
+        expect(Spree::Payment.last.source.paypal_funding_source).to eq "venmo"
+      end
+    end
+
+    context "when a payment fails" do
+      before { allow_any_instance_of(PayPal::PayPalHttpClient).to receive(:execute) { failed_response } }
+
+      it "redirects the user back to the payments page" do
+        visit '/checkout/payment'
+        choose(option: paypal_payment_method.id)
+        find(:xpath, "//input[@id='payments_source_paypal_order_id']", visible: false).set SecureRandom.hex(8)
+        click_button("Save and Continue")
+        click_button("Place Order")
+        expect(page).to have_current_path("/checkout/payment")
+        expect(page).to have_content("Your payment was declined")
+      end
+    end
+  end
+end