def test_jointree_marginal_evidence_multiple_evidence(self):
        ft = FactorTree.create_jointree(self.bn)
        ft.set_evidence( {"winter": "true", "rain": "false"})
        resFactor = ft.marginals(["wet_grass"])
        np.testing.assert_array_almost_equal(resFactor.get_potential(), np.array([0.02, 0.98]))