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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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