code: def test_union_all(self):
      t_env = self.t_env
      t1 = t_env.from_elements(self.data1, self.schema)
      t2 = t_env.from_elements(self.data2, self.schema)
  
      result = t1.union_all(t2)
      self.assertEqual(
          "UNION",
          result._j_table.getQueryOperation().getType().toString(),
      )
      self.assertTrue(result._j_table.getQueryOperation().isAll())
  
file_path: flink/flink-python/pyflink/table/tests/test_set_operation.py
imports: from pyflink.table import TableEnvironment, EnvironmentSettings
  from pyflink.testing.test_case_utils import PyFlinkTestCase
label_desc: Use image node_id 5 for calling the StreamTableSetOperationTests obj's underlying member method code with example usage: obj.test_union_all() without return types