code: def test_interp(self, fn):
      # SymPy does not implement truncation for Expressions
      if fn in ("div", "truncdiv", "minimum", "maximum"):
          return
  
      from sympy.abc import x, y
  
      vals = CONSTANTS
      if fn in {*UNARY_BOOL_OPS, *BINARY_BOOL_OPS}:
          vals = [True, False]
      arity = 1
      if fn in {*BINARY_OPS, *BINARY_BOOL_OPS, *COMPARE_OPS}:
          arity = 2
      symbols = [x]
      if arity == 2:
          symbols = [x, y]
      for args in itertools.product(vals, repeat=arity):
          if arity == 1 and not valid_unary(fn, *args):
              continue
          elif arity == 2 and not valid_binary(fn, *args):
              continue
          with self.subTest(args=args):
              sargs = [sympy.sympify(a) for a in args]
              sympy_expr = getattr(ReferenceAnalysis, fn)(*symbols)
              ref_r = getattr(ReferenceAnalysis, fn)(*sargs)
              # Yes, I know this is a longwinded way of saying xreplace; the
              # point is to test sympy_interp
              r = sympy_interp(
                  ReferenceAnalysis,
                  dict(zip(symbols, sargs)),
                  sympy_expr,
              )
              self.assertEqual(ref_r, r)
  
imports: import itertools
  import sys
  import sympy
  from typing import Callable, List, Tuple, Type
  from torch.testing._internal.common_device_type import skipIf
  from torch.testing._internal.common_utils import TEST_Z3, instantiate_parametrized_tests, parametrize, run_tests, TestCase
  from torch.utils._sympy.functions import FloorDiv
  from torch.utils._sympy.solve import INEQUALITY_TYPES, mirror_rel_op, try_solve
  from torch.utils._sympy.value_ranges import ValueRangeAnalysis, ValueRanges
  from torch.utils._sympy.reference import ReferenceAnalysis, PythonReferenceAnalysis
  from torch.utils._sympy.interp import sympy_interp
  from torch.utils._sympy.singleton_int import SingletonInt
  from sympy.core.relational import is_ge, is_le, is_gt, is_lt
  import functools
  import torch.fx
label_desc: Use image node_id 1 for calling the TestSympyInterp obj's underlying member method code with example usage: obj.test_interp(fn) without return types