code: def test_issubschema():
      assert issubschema("int", "int")
      assert not issubschema("int", "float32")
  
      assert issubschema("2 * int", "2 * int")
      assert not issubschema("2 * int", "3 * int")
  
file_path: datashader/datashader/datashape/tests/test_user.py
imports: import pytest
  from datashader.datashape.user import issubschema, validate
  from datashader.datashape import dshape
  from datetime import date, time, datetime
  import numpy
label_desc: Use image node_id 8 for calling a global function with example usage: test_issubschema() without return types