code: def test_single_show_gpu(self):
      times = numpy.array([[5.4], [6.4]]) * 1e-6
      perf = _time._PerfCaseResult("test_name_xxx", times, (0,))
      assert str(perf) == (
          "test_name_xxx       :    CPU:     5.400 us "
          "    GPU-0:     6.400 us"
      )
  
file_path: cupy/tests/cupyx_tests/profiler_tests/test_benchmark.py
imports: import unittest
  from unittest import mock
  import numpy
  import cupy
  from cupy import testing
  from cupyx import profiler
  from cupyx.profiler import _time
label_desc: Use image node_id 3 for calling the TestPerfCaseResult obj's underlying member method code with example usage: obj.test_single_show_gpu() without return types