tests/testthat/testthat-distilbert-for-token-classification.R

In r-spark/sparknlp: R Interface to John Snow Labs Spark NLP

setup({
  sc <- testthat_spark_connection()
  text_tbl <- testthat_tbl("test_text")

  # These lines should set a pipeline that will ultimately create the columns needed for testing the annotator
  assembler <- nlp_document_assembler(sc, input_col = "text", output_col = "document")
  sentdetect <- nlp_sentence_detector(sc, input_cols = c("document"), output_col = "sentence")
  tokenizer <- nlp_tokenizer(sc, input_cols = c("document"), output_col = "token")
  # TODO: put other annotators here as needed

  pipeline <- ml_pipeline(assembler, sentdetect, tokenizer)
  test_data <- ml_fit_and_transform(pipeline, text_tbl)

  assign("sc", sc, envir = parent.frame())
  assign("pipeline", pipeline, envir = parent.frame())
  assign("test_data", test_data, envir = parent.frame())
})

teardown({
  rm(sc, envir = .GlobalEnv)
  rm(pipeline, envir = .GlobalEnv)
  rm(test_data, envir = .GlobalEnv)
})


test_that("nlp_distilbert_token_classification pretrained", {
  model <- nlp_distilbert_token_classification_pretrained(sc, input_cols = c("sentence", "token"), output_col = "distilbert")
  transformed_data <- ml_transform(model, test_data)
  expect_true("distilbert" %in% colnames(transformed_data))
})

test_that("nlp_distilbert_token_classification load", {
  model_files <- list.files("~/cache_pretrained/")
  bert_model_file <- max(Filter(function(s) startsWith(s, "distilbert_base_token"), model_files))
  model <- ml_load(sc, paste0("~/cache_pretrained/", bert_model_file))
  model <- nlp_set_output_col(model, "label")
  transformed_data <- ml_transform(model, test_data)
  expect_true("label" %in% colnames(transformed_data))
})