code: def test_equal_to_numpy_flip(self):
      x = numpy.random.uniform(-1, 1, self.shape).astype(self.dtype)
      numpy.testing.assert_array_equal(
          functions.array.flip._flip(x, self.axis),
          numpy.flip(x, self.axis),
      )
  
imports: import unittest
  import numpy
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestFlipFunction obj's underlying member method code with example usage: obj.test_equal_to_numpy_flip() without return types