added tests for all formatters; stylecheck workflow now also checks in tests now

tests/formatters/tests_remove_default_formatter.py

@@ -0,0 +1,29 @@
+import unittest
+from bs4 import BeautifulSoup
+from bs4.formatter import HTMLFormatter
+
+from html_to_django.formatters.remove_default_formatter import format
+
+
+class TestFormatFunction(unittest.TestCase):
+    # The strings here look weird because of the indentation and line breaks, but it must be this way
+    def test_basic(self) -> None:
+        html = """<!DOCTYPE html>
+        <html lang="en" dj-remove-default>
+            <head>
+                <meta charset="UTF-8">
+                <title>Title</title>
+            </head>
+            <body>
+                <h1>
+                    Test
+                </h1>
+                <script src="test.js">
+                </script>
+            </body>
+        </html>
+        """
+        soup = BeautifulSoup(html, "html.parser")
+        format(soup)
+        expected_result = "<h1>\n    Test\n</h1>\n"
+        self.assertEqual(expected_result, soup.prettify(formatter=HTMLFormatter(indent=4)))