Clean up for api/base controller (#3629)

* Move ApiController to Api/BaseController

* API controllers inherit from Api::BaseController

* Add coverage for various error cases in api/base controller

spec/controllers/api/base_controller_spec.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+class FakeService; end
+
+describe Api::BaseController do
+  controller do
+    def success
+      head 200
+    end
+
+    def error
+      FakeService.new
+    end
+  end
+
+  describe 'Forgery protection' do
+    before do
+      routes.draw { post 'success' => 'api/base#success' }
+    end
+
+    it 'does not protect from forgery' do
+      ActionController::Base.allow_forgery_protection = true
+      post 'success'
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe 'Error handling' do
+    ERRORS_WITH_CODES = {
+      ActiveRecord::RecordInvalid => 422,
+      Mastodon::ValidationError => 422,
+      ActiveRecord::RecordNotFound => 404,
+      Goldfinger::Error => 422,
+      HTTP::Error => 503,
+      OpenSSL::SSL::SSLError => 503,
+      Mastodon::NotPermittedError => 403,
+    }
+
+    before do
+      routes.draw { get 'error' => 'api/base#error' }
+    end
+
+    ERRORS_WITH_CODES.each do |error, code|
+      it "Handles error class of #{error}" do
+        expect(FakeService).to receive(:new).and_raise(error)
+
+        get 'error'
+        expect(response).to have_http_status(code)
+      end
+    end
+  end
+end

spec/controllers/api_controller_spec.rb

@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe ApiController, type: :controller do
-  controller do
-    def success
-      head 200
-    end
-  end
-
-  before do
-    routes.draw { post 'success' => 'api#success' }
-  end
-
-  it 'does not protect from forgery' do
-    ActionController::Base.allow_forgery_protection = true
-    post 'success'
-    expect(response).to have_http_status(:success)
-  end
-end