skip_if_not_installed("gbm")
set.seed(102) # for reproducibility
invisible(capture.output(
suppressPackageStartupMessages({
m1 <- gbm::gbm(
mpg ~ gear + cyl + wt,
data = mtcars,
var.monotone = c(0, 0, 0),
distribution = "gaussian",
shrinkage = 0.1,
interaction.depth = 1,
bag.fraction = 0.5,
train.fraction = 0.5,
n.minobsinnode = 1,
cv.folds = 3,
keep.data = TRUE,
verbose = FALSE,
n.cores = 1
)
})
))
test_that("model_info", {
expect_true(model_info(m1)$is_linear)
expect_false(model_info(m1)$is_binomial)
})
test_that("find_predictors", {
expect_identical(find_predictors(m1), list(conditional = c("gear", "cyl", "wt")))
expect_identical(
find_predictors(m1, flatten = TRUE),
c("gear", "cyl", "wt")
)
expect_null(find_predictors(m1, effects = "random"))
})
test_that("find_random", {
expect_null(find_random(m1))
})
test_that("get_random", {
expect_warning(get_random(m1))
})
test_that("find_response", {
expect_identical(find_response(m1), "mpg")
})
test_that("get_response", {
expect_equal(get_response(m1), mtcars$mpg)
})
test_that("get_predictors", {
expect_equal(colnames(get_predictors(m1)), c("gear", "cyl", "wt"))
})
test_that("link_inverse", {
expect_equal(link_inverse(m1)(0.2), 0.2, tolerance = 1e-5)
})
test_that("get_data", {
expect_equal(nrow(get_data(m1)), 32)
expect_equal(colnames(get_data(m1)), c("mpg", "gear", "cyl", "wt"))
})
test_that("find_formula", {
expect_length(find_formula(m1), 1)
expect_equal(
find_formula(m1),
list(conditional = as.formula("mpg ~ gear + cyl + wt")),
ignore_attr = TRUE
)
})
test_that("find_variables", {
expect_equal(
find_variables(m1),
list(
response = "mpg",
conditional = c("gear", "cyl", "wt")
)
)
expect_equal(
find_variables(m1, flatten = TRUE),
c("mpg", "gear", "cyl", "wt")
)
})
test_that("n_obs", {
expect_equal(n_obs(m1), 32)
})
test_that("linkfun", {
expect_false(is.null(link_function(m1)))
})
test_that("find_parameters", {
expect_equal(
find_parameters(m1),
list(conditional = c("wt", "cyl", "gear"))
)
expect_equal(nrow(get_parameters(m1)), 3)
expect_equal(get_parameters(m1)$Parameter, c("wt", "cyl", "gear"))
})
test_that("find_terms", {
expect_equal(
find_terms(m1),
list(
response = "mpg",
conditional = c("gear", "cyl", "wt")
)
)
})
test_that("is_multivariate", {
expect_false(is_multivariate(m1))
})
test_that("find_algorithm", {
expect_warning(expect_null(find_algorithm(m1)))
})
test_that("find_statistic", {
expect_null(find_statistic(m1))
})
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