code: def __init__(self, before, expected, preconditions=None):
      if isinstance(before, tir.expr.EqualOp):
          before = before.asobject()
      if isinstance(expected, tir.expr.EqualOp):
          expected = expected.asobject()
  
      self.before = before
      self.expected = expected
      self.preconditions = preconditions
  
imports: import inspect
  import pytest
  import tvm
  from tvm import te, tir
  from tvm.tir import truncdiv, truncmod, floordiv, floormod
label_desc: Use image node_id 1 to create a new TestCase object  with example: obj = TestCase(before, expected, preconditions)