code: def test_jitted_read_assign(self):
      class Cache:
          def __init__(self):
              self.good_cache = Tensor.zeros(1)
              self.bad_cache = Tensor.zeros(1)
              self.good_jitted = TinyJit(self.good)
              self.bad_jitted = TinyJit(self.bad)
  
          def good(self, y, cache_v=None):
              if cache_v is not None:
                  self.good_cache.assign(cache_v + 1 - 1).realize()
              return (
                  self.good_cache + y
              ).realize()  # need + y to provide inputs to JIT
  
          def bad(self, y, cache_v=None):
              if cache_v is not None:
                  self.bad_cache.assign(cache_v).realize()
              return (self.bad_cache + y).realize()
  
      cache = Cache()
      np.testing.assert_equal([0], cache.good_cache.numpy())
      np.testing.assert_equal([0], cache.bad_cache.numpy())
  
      zero = Tensor([0])
      one = Tensor([1])
      two = Tensor([2])
  
      # save [1] in the caches
      cache.good(zero, one)
      cache.bad(zero, one)
      np.testing.assert_equal([1], cache.good_cache.numpy())
      np.testing.assert_equal([1], cache.bad_cache.numpy())
  
      for i in range(5):
          x = Tensor(
              [i]
          )  # NOTE: if this doesn't change, it just hits the lazybuffer cache
          cache.good_jitted(x)
          cache.bad_jitted(x)
  
      # verify the jitted calls read 1 from the cache
      np.testing.assert_equal([1], cache.good_jitted(zero).numpy())
      np.testing.assert_equal([1], cache.bad_jitted(zero).numpy())
  
      # save [2] in the caches
      cache.good(zero, two)
      cache.bad(zero, two)
      np.testing.assert_equal([2], cache.good_cache)
      np.testing.assert_equal([2], cache.bad_cache)
  
      # verify the jitted calls read 2 from the cache
      np.testing.assert_equal([2], cache.good_jitted(zero).numpy())
      # but the bad_jitted doesn't!
      np.testing.assert_equal([1], cache.bad_jitted(zero).numpy())
  
      assert_jit_cache_len(cache.good_jitted, 1)
      assert_jit_cache_len(cache.bad_jitted, 1)
  
imports: import unittest, functools
  import numpy
  from test.helpers import assert_jit_cache_len
  from tinygrad.tensor import Tensor
  from tinygrad.jit import TinyJit
  from tinygrad.device import Device
  from tinygrad.helpers import CI
label_desc: Use image node_id 17 for calling the TestJit obj's underlying member method code with example usage: obj.test_jitted_read_assign() and returns: unknown, unknown