Add registration tests

Gemfile

@@ -88,6 +88,7 @@ gem 'puma'
 
 group :development, :test do
   gem 'rake'
+  gem 'rspec-mocks'
   gem 'rspec-rails', '~> 3.9'
   gem 'rspec-its', '~> 1.3'
   gem "rspec-sidekiq", "~> 3.0", require: false

Gemfile.lock

@@ -609,6 +609,7 @@ DEPENDENCIES
   redis
   rolify (~> 5.2)
   rspec-its (~> 1.3)
+  rspec-mocks
   rspec-rails (~> 3.9)
   rspec-sidekiq (~> 3.0)
   ruby-progressbar

config/initializers/hcaptcha.rb

@@ -3,4 +3,6 @@ return unless APP_CONFIG.dig(:hcaptcha, :enabled)
 Hcaptcha.configure do |config|
   config.site_key = APP_CONFIG.dig(:hcaptcha, :site_key)
   config.secret_key = APP_CONFIG.dig(:hcaptcha, :secret_key)
+
+  config.skip_verify_env.delete 'test'
 end

spec/controllers/user/registration_controller_spec.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe User::RegistrationsController, type: :controller do
+  before do
+    @request.env["devise.mapping"] = Devise.mappings[:user]
+  end
+
+  describe "#create" do
+    context "valid user sign up" do
+      let :registration_params do
+        {
+            user: {
+                screen_name: 'dio',
+                email: 'the-world-21@somewhere.everywhere',
+                password: 'AReallySecurePassword456!',
+                password_confirmation: 'AReallySecurePassword456!'
+            }
+        }
+      end
+
+      subject { post :create, params: registration_params }
+
+      it "doesn't allow a registration without solving the captcha" do
+        expect { subject }.not_to(change { User.count })
+        expect(response).to redirect_to :new_user_registration
+      end
+
+      it "creates a user" do
+        allow(controller).to receive(:verify_hcaptcha).and_return(true)
+        expect { subject }.to change { User.count }.by(1)
+      end
+    end
+
+    context "invalid user sign up" do
+      subject { post :create, params: registration_params }
+
+      let!(:registration_params) { {} }
+      it "rejects unfilled registration forms" do
+        expect { subject }.not_to(change { User.count })
+      end
+
+      let!(:registration_params) { {
+          user: {
+              screen_name: 'Dio Brando',
+              email: 'the-world-21@somewhere.everywhere',
+              password: 'AReallySecurePassword456!',
+              password_confirmation: 'AReallySecurePassword456!'
+          }
+      } }
+      it "rejects registrations with invalid usernames" do
+        expect { subject }.not_to(change { User.count })
+      end
+
+      let!(:registration_params) { {
+          user: {
+              screen_name: 'inbox',
+              email: 'the-world-21@somewhere.everywhere',
+              password: 'AReallySecurePassword456!',
+              password_confirmation: 'AReallySecurePassword456!'
+          }
+      } }
+      it "rejects registrations with reserved usernames" do
+        expect { subject }.not_to(change { User.count })
+      end
+    end
+  end
+end