code: def test_from_array(self):
      device = backend.CpuDevice.from_array(self.value)
      assert device is None
  
imports: import unittest
  import numpy
  from chainer import backend
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestCpuDeviceFromArrayInvalidValue obj's underlying member method code with example usage: obj.test_from_array() without return types