import unittest

class TestSwapLink(unittest.TestCase):
    
    data_dir = "test/data/search_test"

    def test_wrong_lnk_file(self):
        with self.assertRaises(Exception):
            swap_link(data_dir+"inexistent.txt", data_dir+"/subdir/match1.txt") # inexistent file
        with self.assertRaises(Exception):
            swap_link(data_dir+"/subdir1/match1.txt", data_dir+"/subdir/match1.txt") # non link file
        with self.assertRaises(Exception):
            swap_link(data_dir+"lnk_dir/ln_valid", data_dir+"/subdir/match1.txt") # not broken link
        # TODO: no writing permission on file
    
    def test_wrong_tgt_file(self):
        # TODO: non-existing target
        # TODO: target is link to lnk file (can't have 2 symlinks pointing at one another)
        True