code: def test_string(value, ty, scalar_typ):
      s = pa.scalar(value, type=ty)
      assert isinstance(s, scalar_typ)
      assert s.as_py() == value
      assert s.as_py() != "something"
      assert repr(value) in repr(s)
      assert str(s) == str(value)
  
      buf = s.as_buffer()
      assert isinstance(buf, pa.Buffer)
      assert buf.to_pybytes() == value.encode()
  
imports: import datetime
  import decimal
  import pytest
  import sys
  import weakref
  import numpy
  import pyarrow
  import pyarrow.compute
  from pyarrow.tests import util
label_desc: Use image node_id 29 for calling a global function with example usage: test_string(value, ty, scalar_typ) without return types