def test_predict_pdf_works(predictor, test_pdf):
    # FIXME ugly test since there are '\n's in the dict with unknown heritage
    predictions, metadata = predictor.predict_pdf(test_pdf)
    predictions = [p for p in predictions][0]
    assert predictions["class"] == "formula"
    probabilities = predictions["probabilities"]
    # Floating point precision problem for output so test only that keys exist not the values
    assert all(key in probabilities for key in ("formula", "other", "signature", "logo"))
    metadata = list(metadata)
    metadata = dict(**metadata[0])
    metadata.pop("document_filename")  # temp filename cannot be tested
    assert metadata == {'px_width': 389.0, 'px_height': 389.0, 'width': 194.49999000000003,
                        'height': 194.49998999999997, 'x1': 320.861, 'x2': 515.36099, 'y1': 347.699, 'y2': 542.19899,
                        'page_width': 595.2800000000001, 'page_height': 841.89, 'page_rotation': 0, 'page_idx': 1,
                        'n_pages': 3}