Spec coverage and refactor for the api/v1/accounts controllers (#3451)

spec/controllers/api/v1/accounts/relationships_controller_spec.rb

@@ -0,0 +1,69 @@
+require 'rails_helper'
+
+describe Api::V1::Accounts::RelationshipsController do
+  render_views
+
+  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:token) { double acceptable?: true, resource_owner_id: user.id }
+
+  before do
+    allow(controller).to receive(:doorkeeper_token) { token }
+  end
+
+  describe 'GET #index' do
+    let(:simon) { Fabricate(:user, email: 'simon@example.com', account: Fabricate(:account, username: 'simon')).account }
+    let(:lewis) { Fabricate(:user, email: 'lewis@example.com', account: Fabricate(:account, username: 'lewis')).account }
+
+    before do
+      user.account.follow!(simon)
+      lewis.follow!(user.account)
+    end
+
+    context 'provided only one ID' do
+      before do
+        get :index, params: { id: simon.id }
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'returns JSON with correct data' do
+        json = body_as_json
+
+        expect(json).to be_a Enumerable
+        expect(json.first[:following]).to be true
+        expect(json.first[:followed_by]).to be false
+      end
+    end
+
+    context 'provided multiple IDs' do
+      before do
+        get :index, params: { id: [simon.id, lewis.id] }
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'returns JSON with correct data' do
+        json = body_as_json
+
+        expect(json).to be_a Enumerable
+        expect(json.first[:id]).to be simon.id
+        expect(json.first[:following]).to be true
+        expect(json.first[:followed_by]).to be false
+        expect(json.first[:muting]).to be false
+        expect(json.first[:requested]).to be false
+        expect(json.first[:domain_blocking]).to be false
+
+        expect(json.second[:id]).to be lewis.id
+        expect(json.second[:following]).to be false
+        expect(json.second[:followed_by]).to be true
+        expect(json.second[:muting]).to be false
+        expect(json.second[:requested]).to be false
+        expect(json.second[:domain_blocking]).to be false
+      end
+    end
+  end
+end