Add GET /api/v1/donation_campaigns (#37880)

spec/requests/api/v1/donation_campaigns_spec.rb

@@ -0,0 +1,105 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Donation campaigns' do
+  include_context 'with API authentication'
+
+  describe 'GET /api/v1/donation_campaigns' do
+    context 'when not authenticated' do
+      it 'returns http unprocessable entity' do
+        get '/api/v1/donation_campaigns'
+
+        expect(response)
+          .to have_http_status(422)
+        expect(response.content_type)
+          .to start_with('application/json')
+      end
+    end
+
+    context 'when no donation campaign API is set up' do
+      it 'returns http empty' do
+        get '/api/v1/donation_campaigns', headers: headers
+
+        expect(response)
+          .to have_http_status(204)
+      end
+    end
+
+    context 'when a donation campaign API is set up' do
+      let(:api_url) { 'https://example.org/donations' }
+      let(:seed) { Random.new(user.account_id).rand(100) }
+
+      around do |example|
+        original = Rails.configuration.x.donation_campaigns.api_url
+        Rails.configuration.x.donation_campaigns.api_url = api_url
+
+        example.run
+
+        Rails.configuration.x.donation_campaigns.api_url = original
+      end
+
+      context 'when the donation campaign API does not return a campaign' do
+        before do
+          stub_request(:get, "#{api_url}?platform=web&seed=#{seed}&locale=en").to_return(status: 204)
+        end
+
+        it 'returns http empty' do
+          get '/api/v1/donation_campaigns', headers: headers
+
+          expect(response)
+            .to have_http_status(204)
+        end
+      end
+
+      context 'when the donation campaign API returns a campaign' do
+        let(:campaign_json) do
+          {
+            'id' => 'campaign-1',
+            'banner_message' => 'Hi',
+            'banner_button_text' => 'Donate!',
+            'donation_message' => 'Hi!',
+            'donation_button_text' => 'Money',
+            'donation_success_post' => 'Success post',
+            'amounts' => {
+              'one_time' => {
+                'EUR' => [1, 2, 3],
+                'USD' => [4, 5, 6],
+              },
+              'monthly' => {
+                'EUR' => [1],
+                'USD' => [2],
+              },
+            },
+            'default_currency' => 'EUR',
+            'donation_url' => 'https://sponsor.joinmastodon.org/donate/new',
+            'locale' => 'en',
+          }
+        end
+
+        before do
+          stub_request(:get, "#{api_url}?platform=web&seed=#{seed}&locale=en").to_return(body: Oj.dump(campaign_json), status: 200)
+        end
+
+        it 'returns the expected campaign' do
+          get '/api/v1/donation_campaigns', headers: headers
+
+          expect(response)
+            .to have_http_status(200)
+
+          expect(response.content_type)
+            .to start_with('application/json')
+
+          expect(response.parsed_body)
+            .to match(campaign_json)
+
+          expect(Rails.cache.read("donation_campaign_request:#{seed}:en", raw: true))
+            .to eq 'campaign-1:en'
+
+          expect(Oj.load(Rails.cache.read('donation_campaign:campaign-1:en', raw: true)))
+            .to match(campaign_json)
+        end
+      end
+    end
+  end
+end