require 'rails_helper' RSpec.describe Heartbeat, type: :model do let(:heartbeat){create(:heartbeat)} it "update device heartbeat details" do device = heartbeat.device expect(device.last_heartbeat_recd_time).to eq(heartbeat.created_at) expect(device.heartbeats_count).to eq(1) end it "next heartbeat" do expect(heartbeat.next_heartbeat_time).not_to be_nil end end