new_contents: from unittest import TestCase
  
  from phi import math
  
  
  def assert_not_close(*tensors, rel_tolerance, abs_tolerance):
      try:
          math.assert_close(*tensors, rel_tolerance, abs_tolerance)
          raise BaseException(AssertionError('1 != 0'))
      except AssertionError:
          pass
  
  
  class TestMathFunctions(TestCase):
  
      def test_assert_close(self):
          math.assert_close(math.zeros(a=10), math.zeros(a=10), math.zeros(b=10), rel_tolerance=0, abs_tolerance=0)
          assert_not_close(math.zeros(a=10), math.ones(a=10), rel_tolerance=0, abs_tolerance=0)
          for scale in (1, 0.1, 10):
              math.assert_close(math.zeros(a=10), math.ones(a=10) * scale, rel_tolerance=0, abs_tolerance=scale)
              math.assert_close(math.zeros(a=10), math.ones(a=10) * scale, rel_tolerance=1, abs_tolerance=0)
              assert_not_close(math.zeros(a=10), math.ones(a=10) * scale, rel_tolerance=0.9, abs_tolerance=0)
              assert_not_close(math.zeros(a=10), math.ones(a=10) * scale, rel_tolerance=0, abs_tolerance=0.9 * scale)
          math.set_precision(64)
          assert_not_close(math.zeros(a=10), math.ones(a=10) * 1e-100, rel_tolerance=0, abs_tolerance=0)
          math.assert_close(math.zeros(a=10), math.ones(a=10) * 1e-100, rel_tolerance=0, abs_tolerance=1e-15)
  
subject: Test for math.assert_close()