def test_are_valid_categories(self):
utl.add_categories_to_db()
# Test checking an array with valid categories
categories = [category["name"] for category in utl.CATEGORIES]
valid = Category.are_valid_categories(categories)
self.assertEqual(valid, True)
categories.append("failure")
# Test checking an array with one invalid category
valid = Category.are_valid_categories(categories)
self.assertEqual(valid, False)
# Test checking an empty list
valid = Category.are_valid_categories([])
self.assertEqual(valid, False)
