Refactor diversity calculation tests for content bundling

Consolidated and improved diversity calculation tests for content bundling, including a new test case for empty word lists.

src/tribler/core/components/knowledge/rules/tests/test_content_bundling.py

@@ -95,14 +95,14 @@ def test_calculate_diversity_min_word_len(min_word_length, diversity):
 ]
 
 
+def test_calculate_diversity_no_words():
+    # Test that calculate_diversity returns 0 if there are no words in the content list.
+    content_list = [{'name': ''}]
+    assert calculate_diversity(content_list) == 0
+
+
 @pytest.mark.parametrize('text, diversity', DIVERSITY_EXAMPLES)
 def test_calculate_diversity(text, diversity):
     # Test that calculate_diversity calculates diversity based on the text.
     content_list = [{'name': text}]
     assert calculate_diversity(content_list, min_word_length=3) == pytest.approx(diversity, abs=0.01)
-
-
-def test_calculate_diversity_no_words():
-    # Test that calculate_diversity returns 0 if there are no words in the content list.
-    content_list = [{'name': ''}]
-    assert calculate_diversity(content_list) == 0