code: def test_system_cpu_gauge(self):
      # given
      gauge = SystemCpuUsageGauge()
  
      # when
      cpu_usage = gauge.value()
  
      # then
      self.assertGreater(cpu_usage, 0.0)
      self.assertLessEqual(cpu_usage, 100.0)
      self.assertEqual(float, type(cpu_usage))
  
file_path: neptune-client/tests/unit/neptune/legacy/internal/hardware/gauges/test_cpu_gauges.py
imports: import time
  import unittest
  from neptune.common.hardware.gauges.cpu import CGroupCpuUsageGauge, SystemCpuUsageGauge
label_desc: Use image node_id 1 for calling the TestCpuGauges obj's underlying member method code with example usage: obj.test_system_cpu_gauge() without return types