BERTopic/tests/test_plotting/test_approximate.py

import copy
import pytest

@pytest.mark.parametrize("batch_size", [50, None])
@pytest.mark.parametrize("padding", [True, False])
@pytest.mark.parametrize('model', [('kmeans_pca_topic_model'),
                                   ('base_topic_model'),
                                   ('custom_topic_model'),
                                   ('merged_topic_model'),
                                   ('reduced_topic_model')])
def test_approximate_distribution(batch_size, padding, model, documents, request):
    topic_model = copy.deepcopy(request.getfixturevalue(model))
   
    # Calculate only on a document-level based on tokensets
    topic_distr, _ = topic_model.approximate_distribution(documents, padding=padding, batch_size=batch_size)
    assert topic_distr.shape[1] == len(topic_model.topic_labels_) - topic_model._outliers

    # Use the distribution visualization
    for i in range(3):
        topic_model.visualize_distribution(topic_distr[i])

    # Calculate distribution on a token-level
    topic_distr, topic_token_distr =  topic_model.approximate_distribution(documents[:100], calculate_tokens=True)
    assert topic_distr.shape[1] == len(topic_model.topic_labels_) - topic_model._outliers
    assert len(topic_token_distr) == len(documents[:100])

    for token_distr in topic_token_distr:
        assert token_distr.shape[1] == len(topic_model.topic_labels_) - topic_model._outliers