from django.test import TestCase

from bookmarks.models import parse_tag_string


class TagTestCase(TestCase):

    def test_parse_tag_string_returns_list_of_tag_names(self):
        self.assertCountEqual(parse_tag_string('book, movie, album'), ['book', 'movie', 'album'])

    def test_parse_tag_string_respects_separator(self):
        self.assertCountEqual(parse_tag_string('book movie album', ' '), ['book', 'movie', 'album'])

    def test_parse_tag_string_orders_tag_names_alphabetically(self):
        self.assertListEqual(parse_tag_string('book,movie,album'), ['album', 'book', 'movie'])
        self.assertListEqual(parse_tag_string('Book,movie,album'), ['album', 'Book', 'movie'])

    def test_parse_tag_string_handles_whitespace(self):
        self.assertCountEqual(parse_tag_string('\t  book, movie \t, album, \n\r'), ['album', 'book', 'movie'])

    def test_parse_tag_string_handles_invalid_input(self):
        self.assertListEqual(parse_tag_string(None), [])
        self.assertListEqual(parse_tag_string(''), [])

    def test_parse_tag_string_deduplicates_tag_names(self):
        self.assertEqual(len(parse_tag_string('book,book,Book,BOOK')), 1)