Add BERTopic.

LLMTopicDetection_BERTopic/tests/test_plotting/test_heatmap.py

@@ -0,0 +1,23 @@
+import copy
+import pytest
+
+
+@pytest.mark.parametrize(
+    "model",
+    [
+        ("kmeans_pca_topic_model"),
+        ("base_topic_model"),
+        ("custom_topic_model"),
+        ("merged_topic_model"),
+        ("reduced_topic_model"),
+    ],
+)
+def test_heatmap(model, request):
+    topic_model = copy.deepcopy(request.getfixturevalue(model))
+    topics = set(topic_model.topics_)
+    if -1 in topics:
+        topics.remove(-1)
+    fig = topic_model.visualize_heatmap()
+    fig_topics = [int(topic.split("_")[0]) for topic in fig.to_dict()["data"][0]["x"]]
+
+    assert set(fig_topics) == topics