#!/usr/bin/env python
# coding: utf-8
"""Test error messages."""
import os
import pytest
from xsuite import xcdo
from xsuite.tools import load_data
ds = load_data('pre', decode_times=False)
datadir = os.path.join(os.path.dirname(__file__), os.path.pardir,
os.path.pardir, 'data')
filename = os.path.join(datadir, 'sresa1b_ncar_ccsm3-example.nc')
def test_no_value():
with pytest.raises(ValueError) as excinfo:
xcdo.CDO(ds).zonmean(23).result()
assert 'does not take any arguments' in str(excinfo.value)
def test_no_input_after_noncinput():
with pytest.raises(TypeError) as excinfo:
xcdo.CDO(ds).sinfon().zonmean().result()
assert 'does not allow further chaining, because of' in str(excinfo.value)
@pytest.mark.parametrize("method", ['ml2pl', 'diffn', 'sellonlatbox'])
def test_mandatory_args(method):
with pytest.raises(ValueError) as excinfo:
getattr(xcdo.CDO(ds), method)().zonmean().result()
def test_raise_exc():
with pytest.raises(Exception) as err:
load_data('unknown')
assert 'Unknown file' in str(err)