code: def test_reduce_default(self):
      np.testing.assert_equal(Tensor([]).max().numpy(), -float("inf"))
      np.testing.assert_equal(Tensor([]).min().numpy(), float("inf"))
      np.testing.assert_equal(Tensor([]).sum().numpy(), 0)
      np.testing.assert_equal(Tensor([]).mean().numpy(), 0)
  
imports: import numpy
  import torch
  import unittest, copy
  import mmap
  from tinygrad import Tensor, Device, dtypes
  from tinygrad.helpers import temp
  from extra.gradcheck import numerical_jacobian, jacobian, gradcheck
label_desc: Use image node_id 12 for calling the TestZeroShapeTensor obj's underlying member method code with example usage: obj.test_reduce_default() without return types