def METHOD_NAME():
    """Test single energy group cadis case"""
    adj_flux_tag = "adj_flux"
    q_tag = "q"
    ww_tag = "ww"
    q_bias_tag = "q_bias"
    # create meshes
    coords = [[0, 1, 2], [-1, 3, 4], [10, 12]]
    adj_flux_mesh = Mesh(structured=True, structured_coords=coords)
    q_mesh = Mesh(structured=True, structured_coords=coords)
    ww_mesh = Mesh(structured=True, structured_coords=coords)
    q_bias_mesh = Mesh(structured=True, structured_coords=coords)
    # add tags to meshes
    adj_flux_mesh.adj_flux = NativeMeshTag(1, float)
    q_mesh.q = NativeMeshTag(1, float)
    # create data for input meshes
    adj_flux_data = [1.1, 1.3, 1.5, 1.7]
    q_data = [2.9, 2.6, 2.4, 2.2]
    # data data to mesh
    adj_flux_mesh.adj_flux[:] = adj_flux_data
    q_mesh.q[:] = q_data
    # run CADIS
    cadis(
        adj_flux_mesh,
        adj_flux_tag,
        q_mesh,
        q_tag,
        ww_mesh,
        ww_tag,
        q_bias_mesh,
        q_bias_tag,
        beta=5,
    )
    # checkout output meshes
    expected_ww = [0.3995338, 0.33806706, 0.29299145, 0.258521908]
    expected_q_bias = [0.04652859, 0.04929988, 0.052508751, 0.0545507858]
    ww_mesh.ww = NativeMeshTag(1, float)
    q_bias_mesh.q_bias = NativeMeshTag(1, float)
    assert_array_almost_equal(ww_mesh.ww[:], expected_ww[:])
    assert_array_almost_equal(q_bias_mesh.q_bias[:], expected_q_bias[:])