Make tag search and assignment case insensitive (#56)

* Make tag assignment and search case-insensitive (#45)

* Add tests for tag case-sensitivity and deduplication (#45)

Co-authored-by: Sascha Ißbrücker <sissbruecker@lyska.io>

bookmarks/tests/test_tags_model.py

@@ -0,0 +1,27 @@
+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)
+

bookmarks/tests/test_tags_service.py

@@ -0,0 +1,60 @@
+import datetime
+from django.contrib.auth import get_user_model
+from django.test import TestCase
+from django.utils import timezone
+
+from bookmarks.models import Tag
+from bookmarks.services.tags import get_or_create_tag, get_or_create_tags
+
+User = get_user_model()
+
+
+class TagTestCase(TestCase):
+
+    def setUp(self) -> None:
+        self.user = User.objects.create_user('testuser', 'test@example.com', 'password123')
+
+    def test_get_or_create_tag_should_create_new_tag(self):
+        get_or_create_tag('Book', self.user)
+
+        tags = Tag.objects.all()
+
+        self.assertEqual(len(tags), 1)
+        self.assertEqual(tags[0].name, 'Book')
+        self.assertEqual(tags[0].owner, self.user)
+        self.assertTrue(abs(tags[0].date_added - timezone.now()) < datetime.timedelta(seconds=10))
+
+    def test_get_or_create_tag_should_return_existing_tag(self):
+        first_tag = get_or_create_tag('Book', self.user)
+        second_tag = get_or_create_tag('Book', self.user)
+
+        tags = Tag.objects.all()
+
+        self.assertEqual(len(tags), 1)
+        self.assertEqual(first_tag.id, second_tag.id)
+
+    def test_get_or_create_tag_should_ignore_casing_when_looking_for_existing_tag(self):
+        first_tag = get_or_create_tag('Book', self.user)
+        second_tag = get_or_create_tag('book', self.user)
+
+        tags = Tag.objects.all()
+
+        self.assertEqual(len(tags), 1)
+        self.assertEqual(first_tag.id, second_tag.id)
+
+    def test_get_or_create_tags_should_return_tags(self):
+        books_tag = get_or_create_tag('Book', self.user)
+        movies_tag = get_or_create_tag('Movie', self.user)
+
+        tags = get_or_create_tags(['book', 'movie'], self.user)
+
+        self.assertEqual(len(tags), 2)
+        self.assertListEqual(tags, [books_tag, movies_tag])
+
+    def test_get_or_create_tags_should_deduplicate_tags(self):
+        books_tag = get_or_create_tag('Book', self.user)
+
+        tags = get_or_create_tags(['book', 'Book', 'BOOK'], self.user)
+
+        self.assertEqual(len(tags), 1)
+        self.assertListEqual(tags, [books_tag])