code: def test_floor(self):
      self.check_unary("floor")
      self.check_unary_complex_unsupported("floor")
  
imports: import unittest
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 8 for calling the TestRounding obj's underlying member method code with example usage: obj.test_floor() without return types