Fix #5104 - GET /api/v1/apps/verify_credentials to confirm app works (#5112)

app/controllers/api/v1/apps/credentials_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class Api::V1::Apps::CredentialsController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read }
+
+  respond_to :json
+
+  def show
+    render json: doorkeeper_token.application, serializer: REST::StatusSerializer::ApplicationSerializer
+  end
+end

app/controllers/api/v1/apps_controller.rb

@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
 class Api::V1::AppsController < Api::BaseController
-  respond_to :json
-
   def create
     @app = Doorkeeper::Application.create!(application_options)
     render json: @app, serializer: REST::ApplicationSerializer

config/routes.rb

@@ -194,12 +194,17 @@ Rails.application.routes.draw do
 
       resources :follows,    only: [:create]
       resources :media,      only: [:create, :update]
-      resources :apps,       only: [:create]
       resources :blocks,     only: [:index]
       resources :mutes,      only: [:index]
       resources :favourites, only: [:index]
       resources :reports,    only: [:index, :create]
 
+      namespace :apps do
+        get :verify_credentials, to: 'credentials#show'
+      end
+
+      resources :apps, only: [:create]
+
       resource :instance,      only: [:show]
       resource :domain_blocks, only: [:show, :create, :destroy]
 

spec/controllers/api/v1/apps/credentials_controller_spec.rb

@@ -0,0 +1,43 @@
+require 'rails_helper'
+
+describe Api::V1::Apps::CredentialsController do
+  render_views
+
+  let(:token) { Fabricate(:accessible_access_token, scopes: 'read', application: Fabricate(:application)) }
+
+  context 'with an oauth token' do
+    before do
+      allow(controller).to receive(:doorkeeper_token) { token }
+    end
+
+    describe 'GET #show' do
+      before do
+        get :show
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(:success)
+      end
+
+      it 'does not contain client credentials' do
+        json = body_as_json
+
+        expect(json).to_not have_key(:client_secret)
+        expect(json).to_not have_key(:client_id)
+      end
+    end
+  end
+
+  context 'without an oauth token' do
+    before do
+      allow(controller).to receive(:doorkeeper_token) { nil }
+    end
+
+    describe 'GET #show' do
+      it 'returns http unauthorized' do
+        get :show
+        expect(response).to have_http_status(:unauthorized)
+      end
+    end
+  end
+end