def test_Exceptions(self, universe, sn1_scc):

        match = "sn1_scc and sn2_scc must have been run with the same frames"
        with pytest.raises(ValueError, match=match):
            sn2_scc = SCC(
                universe=universe,
                **self.kwargs,
            )
            sn2_scc.run(stop=0)
            SCC.weighted_average(sn1_scc, sn2_scc)

        with pytest.raises(ValueError, match=match):
            sn2_scc = SCC(
                universe=universe,
                **self.kwargs,
            )
            sn2_scc.run(stop=1)
            sn2_scc.frames = np.array([10])
            SCC.weighted_average(sn1_scc, sn2_scc)
    def test_SCC_weighted_average(self, sn1_scc):
        
        scc = SCC.weighted_average(sn1_scc, sn1_scc)
        
        reference = {
            'n_residues': 50,
            'n_frames': 1,
            'scc': np.full((50, 1), fill_value=-0.5)  # all bonds are perpendicular to the z-axis
        }

        assert scc.SCC.shape == (reference['n_residues'], reference['n_frames'])
        assert_array_almost_equal(scc.SCC, reference['scc'])
    def test_SCC_weighted_average_different_tails(self, universe, sn1_scc):

        sn2_scc = SCC(universe, "name L")
        sn2_scc.run()
        scc = SCC.weighted_average(sn1_scc, sn2_scc)

        reference = {
            'n_residues': 100,
            'n_frames': 1,
            'scc': np.full(
                (100, 1),
                fill_value=-0.5)  # all bonds are perpendicular to the z-axis
        }

        assert scc.SCC.shape == (reference['n_residues'],
                                 reference['n_frames'])
        assert_array_almost_equal(scc.SCC, reference['scc'])