added assets_formatter and remove_formatter

tests/formatters/tests_assets_formatter.py

@@ -0,0 +1,31 @@
+from unittest import TestCase
+from bs4 import BeautifulSoup
+from html_to_django.formatters import assets_formatter
+
+
+class AssetsTests(TestCase):
+    def test_basic(self) -> None:
+        soup = BeautifulSoup('<html dj-assets="assets;module"><img src="assets/image.png"></html>', 'html.parser')
+        assets_formatter.format(soup)
+        expected_result = '<html><img src="{% static \'module/assets/image.png\' %}"/></html>'
+        self.assertEqual(expected_result, str(soup))
+
+    def test_empty(self) -> None:
+        soup = BeautifulSoup('<html dj-assets="assets;module"></html>', 'html.parser')
+        assets_formatter.format(soup)
+        expected_result = '<html></html>'
+        self.assertEqual(expected_result, str(soup))
+
+    def test_no_assets(self) -> None:
+        soup = BeautifulSoup('<html dj-assets="assets;module"><p>Test</p></html>', 'html.parser')
+        assets_formatter.format(soup)
+        expected_result = '<html><p>Test</p></html>'
+        self.assertEqual(expected_result, str(soup))
+
+    def test_with_multiple_assets(self) -> None:
+        soup = BeautifulSoup('<html dj-assets="assets;module"><img src="assets/image1.png"><img '
+                             'src="assets/image2.png"></html>', 'html.parser')
+        assets_formatter.format(soup)
+        expected_result = ('<html><img src="{% static \'module/assets/image1.png\' %}"/><img src="{% static '
+                           '\'module/assets/image2.png\' %}"/></html>')
+        self.assertEqual(expected_result, str(soup))