def test_jointree_evidence_trivial(self):
        ft = FactorTree.create_jointree(self.bn)
        ft.set_evidence({"wet_grass": "false"})
        resFactor = ft.marginals(["rain"])
        np.testing.assert_array_almost_equal(resFactor.get_potential(), np.array([0.158858, 0.841142]))