code: def test_promote_dtypes_different_input_sizes(self, input_size):
      assert (
          type_mapping.promote_dtypes(
              [types.int32, types.int64, types.int16] * input_size
          )
          == types.int64
      )
  
imports: import pytest
  from coremltools.converters.mil.mil import types
  from coremltools.converters.mil.mil.types import type_mapping
label_desc: Use image node_id 2 for calling the TestTypeMapping obj's underlying member method code with example usage: obj.test_promote_dtypes_different_input_sizes(input_size) without return types