tests/testthat/test-step_pca_truncated.R

In orbital: Predict with 'tidymodels' Workflows in Databases

test_that("step_pca_truncated works", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")

	mtcars <- dplyr::as_tibble(mtcars)
	mtcars$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- recipes::bake(rec, new_data = mtcars)

	res <- dplyr::mutate(mtcars, !!!orbital_inline(orbital(rec)))
	res <- res[names(exp)]

	expect_equal(res, exp)
})

test_that("step_pca_truncated works with more than 9 PCs", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")

	mtcars <- dplyr::as_tibble(mtcars)

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- recipes::bake(rec, new_data = mtcars)

	res <- dplyr::mutate(mtcars, !!!orbital_inline(orbital(rec)))
	res <- res[names(exp)]

	expect_equal(res, exp)
})

test_that("step_pca_truncated only calculates what is sufficient", {
	skip_if_not_installed("recipes")

	mtcars <- dplyr::as_tibble(mtcars)
	mtcars$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::step_rm(PC1, PC3, PC5) %>%
			recipes::prep()
	)

	expect_identical(
		names(orbital(rec)),
		c("PC2", "PC4")
	)
})

test_that("step_pca_truncated works with empty selections", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")

	mtcars <- dplyr::as_tibble(mtcars)
	mtcars$hp <- NULL

	rec <- recipes::recipe(mpg ~ ., data = mtcars) %>%
		embed::step_pca_truncated() %>%
		recipes::prep()

	exp <- recipes::bake(rec, new_data = mtcars)

	res <- dplyr::mutate(mtcars, !!!orbital_inline(orbital(rec)))
	res <- res[names(exp)]

	expect_equal(res, exp)
})

test_that("spark - step_pca_truncated works", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")
	skip_if_not_installed("sparklyr")
	skip_if(is.na(testthat_spark_env_version()))

	mtcars0 <- dplyr::as_tibble(mtcars)
	mtcars0$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars0) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- dplyr::mutate(mtcars0, !!!orbital_inline(orbital(rec)))

	sc <- testthat_spark_connection()
	mtcars_tbl <- testthat_tbl("mtcars0")

	res_new <- dplyr::mutate(mtcars_tbl, !!!orbital_inline(orbital(rec))) %>%
		dplyr::collect()

	expect_equal(res_new, exp)
})

test_that("SQLite - step_pca_truncated works", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")
	skip_if_not_installed("DBI")
	skip_if_not_installed("RSQLite")
	skip_on_cran()

	mtcars0 <- dplyr::as_tibble(mtcars)
	mtcars0$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars0) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- dplyr::mutate(mtcars0, !!!orbital_inline(orbital(rec)))

	con <- DBI::dbConnect(RSQLite::SQLite(), path = ":memory:")
	mtcars_tbl <- dplyr::copy_to(con, mtcars0)

	res_new <- dplyr::mutate(mtcars_tbl, !!!orbital_inline(orbital(rec))) %>%
		dplyr::collect()

	expect_equal(res_new, exp)

	DBI::dbDisconnect(con)
})

test_that("duckdb - step_pca_truncated works", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")
	skip_if_not_installed("DBI")
	skip_if_not_installed("duckdb")

	mtcars0 <- dplyr::as_tibble(mtcars)
	mtcars0$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars0) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- dplyr::mutate(mtcars0, !!!orbital_inline(orbital(rec)))

	con <- DBI::dbConnect(duckdb::duckdb(dbdir = ":memory:"))
	mtcars_tbl <- dplyr::copy_to(con, mtcars0)

	res_new <- dplyr::mutate(mtcars_tbl, !!!orbital_inline(orbital(rec))) %>%
		dplyr::collect()

	expect_equal(res_new, exp)

	DBI::dbDisconnect(con)
})

test_that("arrow - step_pca_truncated works", {
	skip_if_not_installed("recipes")
	skip_if_not_installed("embed")
	skip_if_not_installed("arrow")

	mtcars0 <- dplyr::as_tibble(mtcars)
	mtcars0$hp <- NULL

	suppressWarnings(
		rec <- recipes::recipe(mpg ~ ., data = mtcars0) %>%
			embed::step_pca_truncated(recipes::all_predictors()) %>%
			recipes::prep()
	)

	exp <- dplyr::mutate(mtcars0, !!!orbital_inline(orbital(rec)))

	mtcars_tbl <- arrow::as_arrow_table(mtcars0)

	res_new <- dplyr::mutate(mtcars_tbl, !!!orbital_inline(orbital(rec))) %>%
		dplyr::collect()

	expect_equal(res_new, exp)
})