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context("listLearners")
test_that("listLearners", {
x1 = listLearners(create = FALSE, warn.missing.packages = FALSE)
expect_data_frame(x1, min.rows = 1L, min.cols = 10)
expect_set_equal(x1$type, c("classif", "regr", "cluster", "surv", "multilabel"))
expect_subset(listLearnerProperties(), names(x1))
x1a = listLearners("classif", create = FALSE, properties = "missings",
warn.missing.packages = FALSE)
expect_data_frame(x1a, min.rows = 10)
expect_true(nrow(x1a) < nrow(x1))
expect_character(x1a$note, any.missing = FALSE)
x = listLearners(multiclass.task, create = FALSE, warn.missing.packages = FALSE)
expect_data_frame(x, min.rows = 20, min.cols = 3)
expect_true(all(x$type == "classif"))
x = listLearners("surv", properties = c("factors", "missings", "weights"), create = TRUE,
warn.missing.packages = FALSE)
expect_list(x, "Learner", min.len = 1L)
# test that listLearners works without a type and just requested properties,
# we had a bug here
x = listLearners(properties = "factors", create = FALSE)
expect_data_frame(x, min.rows = 20, min.cols = 3)
expect_true(length(unique(x$type)) > 3L)
})
test_that("listLearners printer (#1336)", {
x1 = listLearners(create = FALSE, warn.missing.packages = FALSE)
expect_silent(capture.output(print(x1), file = NULL))
})
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