code: def test_raf_init():
      """Tests ReconcileAdditiveForecasts init"""
      raf = ReconcileAdditiveForecasts()
      assert raf.forecasts is None
      assert raf.covariance is None
      assert raf.covariance is None
      assert raf.constraint_violation is None
      assert raf.figures is None
      assert raf.lam_adj == 0.0
      assert not raf.unbiased
  
imports: import math
  import os
  import warnings
  import cvxpy
  import numpy
  import pandas
  import pytest
  from scipy.linalg import sqrtm
  from sklearn.exceptions import NotFittedError
  from greykite.algo.reconcile.convex.reconcile_forecasts import ReconcileAdditiveForecasts
  from greykite.algo.reconcile.convex.reconcile_forecasts import TraceInfo
  from greykite.algo.reconcile.convex.reconcile_forecasts import apply_method_defaults
  from greykite.algo.reconcile.convex.reconcile_forecasts import evaluation_plot
  from greykite.algo.reconcile.convex.reconcile_forecasts import get_fit_params
  from greykite.algo.reconcile.convex.reconcile_forecasts import get_weight_matrix
  from greykite.algo.reconcile.hierarchical_relationship import HierarchicalRelationship
  from greykite.common.constants import TIME_COL
  from greykite.common.data_loader import DataLoader
  from greykite.common.evaluation import mean_absolute_percent_error
  from greykite.common.evaluation import median_absolute_percent_error
  from greykite.common.evaluation import root_mean_squared_error
  from greykite.common.python_utils import assert_equal
  from greykite.common.python_utils import reorder_columns
label_desc: Use image node_id 7 for calling a global function with example usage: test_raf_init() without return types