code: def test_mode_rank4(self):
      self.check_mode(numpy.random.randn(2, 3, 2, 4), mode=self.mode)
      self.check_mode(numpy.random.randn(2, 4, 3, 3), mode=self.mode)
      self.check_mode(numpy.random.randn(2, 2, 5, 4), mode=self.mode)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupyx import cusolver
  from cupy.cuda import driver
  from cupy.cuda import runtime
  from cupy.linalg import _util
  from cupy import testing
  from cupy.testing import _condition
  import cupyx
label_desc: Use image node_id 5 for calling the TestQRDecomposition obj's underlying member method code with example usage: obj.test_mode_rank4() without return types