"""

Part of the bsie test suite.
A copy of the license is provided with the project.
Author: Matthias Baumgartner, 2022
"""
# standard imports
import unittest

# bsie imports
from bsie.utils import errors

# objects to test
from bsie.utils.loading import safe_load, unpack_qualified_name


## code ##

class TestUtils(unittest.TestCase):
    def test_safe_load(self):
        # invalid module
        self.assertRaises(errors.LoaderError, safe_load, 'dBGHMSAYOoKeKMpywDoKZQycENFPvN', 'foobar')
        self.assertRaises(errors.LoaderError, safe_load, 'dBGHMSAYOoKeKMpywDoKZQycENFPvN.bar', 'foobar')
        # partially valid module
        self.assertRaises(errors.LoaderError, safe_load, 'os.foo', 'foobar')
        # invalid class
        self.assertRaises(errors.LoaderError, safe_load, 'os.path', 'foo')
        # valid module and class
        cls = safe_load('collections.abc', 'Container')
        import collections.abc
        self.assertEqual(cls, collections.abc.Container)

    def test_unpack_qualified_name(self):
        self.assertRaises(TypeError, unpack_qualified_name, 123)
        self.assertRaises(TypeError, unpack_qualified_name, None)
        self.assertRaises(ValueError, unpack_qualified_name, '')
        self.assertRaises(ValueError, unpack_qualified_name, 'path')
        self.assertRaises(ValueError, unpack_qualified_name, '.Path')
        self.assertEqual(unpack_qualified_name('path.Path'), ('path', 'Path'))
        self.assertEqual(unpack_qualified_name('path.foo.bar.Path'), ('path.foo.bar', 'Path'))


## main ##

if __name__ == '__main__':
    unittest.main()

## EOF ##