code: def test_bind_select_statement_union_starts_new_context(
      self, mock_ctx
  ):
      with patch.object(StatementBinder, "bind"):
          binder = StatementBinder(StatementBinderContext(MagicMock()))
          select_statement = MagicMock()
          select_statement.union_link = None
          select_statement.groupby_clause = None
          select_statement.from_table.chunk_params = None
          binder._bind_select_statement(select_statement)
          self.assertEqual(mock_ctx.call_count, 0)
  
          binder = StatementBinder(StatementBinderContext(MagicMock()))
          select_statement = MagicMock()
          select_statement.from_table.chunk_params = None
          select_statement.groupby_clause = None
          binder._bind_select_statement(select_statement)
          self.assertEqual(mock_ctx.call_count, 1)
  
imports: import unittest
  from unittest.mock import MagicMock, Mock, patch
  from evadb.binder.binder_utils import BinderError
  from evadb.binder.statement_binder import StatementBinder
  from evadb.binder.statement_binder_context import StatementBinderContext
  from evadb.catalog.catalog_type import ColumnType, NdArrayType
  from evadb.catalog.models.utils import ColumnCatalogEntry
  from evadb.catalog.sql_config import IDENTIFIER_COLUMN
  from evadb.expression.function_expression import FunctionExpression
  from evadb.expression.tuple_value_expression import TupleValueExpression
  from evadb.parser.alias import Alias
  from evadb.parser.create_statement import ColumnDefinition
label_desc: Use image node_id 14 for calling the StatementBinderTests obj's underlying member method code with example usage: obj.test_bind_select_statement_union_starts_new_context(mock_ctx) without return types