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# -*- coding: utf-8 -*-
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
"""Tests to ensure that base vispy namespace functions correctly,
including configuration options.
"""
import vispy.app
from vispy.testing import (requires_application, run_tests_if_main,
assert_raises, assert_equal, assert_not_equal)
@requires_application('pyside')
def test_use():
# Set default app to None, so we can test the use function
vispy.app.use_app()
default_app = vispy.app._default_app.default_app
vispy.app._default_app.default_app = None
app_name = default_app.backend_name.split(' ')[0]
try:
# With no arguments, should do nothing
assert_raises(TypeError, vispy.use)
assert_equal(vispy.app._default_app.default_app, None)
# With only gl args, should do nothing to app
vispy.use(gl='gl2')
assert_equal(vispy.app._default_app.default_app, None)
# Specify app (one we know works)
vispy.use(app_name)
assert_not_equal(vispy.app._default_app.default_app, None)
# Again, but now wrong app
wrong_name = 'glfw' if app_name.lower() != 'glfw' else 'pyqt4'
assert_raises(RuntimeError, vispy.use, wrong_name)
# And both
vispy.use(app_name, 'gl2')
finally:
# Restore
vispy.app._default_app.default_app = default_app
run_tests_if_main()
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