def METHOD_NAME(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')