require 'rails_helper' RSpec.describe UploadSerializer do let(:upload) { Fabricate(:upload) } let(:subject) { UploadSerializer.new(upload, root: false) } it 'should render without errors' do json_data = JSON.load(subject.to_json) expect(json_data['id']).to eql upload.id expect(json_data['width']).to eql upload.width expect(json_data['height']).to eql upload.height expect(json_data['thumbnail_width']).to eql upload.thumbnail_width expect(json_data['thumbnail_height']).to eql upload.thumbnail_height end end