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sql_lines <- function(...) {
sql(paste0(c(...), collapse = "\n"))
}
test_that("can translate cut", {
expect_equal(
translate_sql(cut(x, 1:2)),
sql_lines(
"CASE",
"WHEN (`x` <= 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN '(1,2]'",
"WHEN (`x` > 2.0) THEN NULL",
"END"
)
)
expect_equal(
translate_sql(cut(x, 1:3)),
sql_lines(
"CASE",
"WHEN (`x` <= 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN '(1,2]'",
"WHEN (`x` <= 3.0) THEN '(2,3]'",
"WHEN (`x` > 3.0) THEN NULL",
"END"
)
)
})
test_that("works with include.lowest = TRUE", {
expect_equal(
translate_sql(cut(x, 1:3, include.lowest = TRUE)),
sql_lines(
"CASE",
"WHEN (`x` < 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN '[1,2]'",
"WHEN (`x` <= 3.0) THEN '(2,3]'",
"WHEN (`x` > 3.0) THEN NULL",
"END"
)
)
})
test_that("works with right = FALSE", {
expect_equal(
translate_sql(cut(x, 1:2, right = FALSE)),
sql_lines(
"CASE",
"WHEN (`x` < 1.0) THEN NULL",
"WHEN (`x` < 2.0) THEN '[1,2)'",
"WHEN (`x` >= 2.0) THEN NULL",
"END"
)
)
})
test_that("works with right = FALSE and include.lowest = TRUE", {
expect_equal(
translate_sql(cut(x, 1:2, right = FALSE, include.lowest = TRUE)),
sql_lines(
"CASE",
"WHEN (`x` < 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN '[1,2]'",
"WHEN (`x` > 2.0) THEN NULL",
"END"
)
)
})
test_that("works with labels = FALSE", {
expect_equal(
translate_sql(cut(x, 1:3, labels = FALSE)),
sql_lines(
"CASE",
"WHEN (`x` <= 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN '1'",
"WHEN (`x` <= 3.0) THEN '2'",
"WHEN (`x` > 3.0) THEN NULL",
"END"
)
)
})
test_that("works with labels a character vector", {
expect_equal(
translate_sql(cut(x, 1:3, labels = c("a", "b"))),
sql_lines(
"CASE",
"WHEN (`x` <= 1.0) THEN NULL",
"WHEN (`x` <= 2.0) THEN 'a'",
"WHEN (`x` <= 3.0) THEN 'b'",
"WHEN (`x` > 3.0) THEN NULL",
"END"
)
)
expect_snapshot(
(expect_error(translate_sql(cut(x, 1:3, labels = c("a", "b", "c")))))
)
})
test_that("can handle infinity", {
expect_equal(
translate_sql(cut(x, c(-Inf, 0, 1, Inf))),
sql_lines(
"CASE",
"WHEN (`x` <= 0.0) THEN '(-Inf,0]'",
"WHEN (`x` <= 1.0) THEN '(0,1]'",
"WHEN (`x` > 1.0) THEN '(1,Inf]'",
"END"
)
)
expect_equal(
translate_sql(cut(x, c(-Inf, 0, 1, Inf), right = FALSE)),
sql_lines(
"CASE",
"WHEN (`x` < 0.0) THEN '[-Inf,0)'",
"WHEN (`x` < 1.0) THEN '[0,1)'",
"WHEN (`x` >= 1.0) THEN '[1,Inf)'",
"END"
)
)
expect_equal(
translate_sql(cut(x, c(-Inf, 0, 1, Inf), include.lowest = TRUE)),
sql_lines(
"CASE",
"WHEN (`x` <= 0.0) THEN '[-Inf,0]'",
"WHEN (`x` <= 1.0) THEN '(0,1]'",
"WHEN (`x` > 1.0) THEN '(1,Inf]'",
"END"
)
)
})
test_that("cut checks arguments", {
expect_snapshot({
(expect_error(translate_sql(cut(x, 1))))
(expect_error(translate_sql(cut(x, c(1, 1)))))
(expect_error(translate_sql(cut(x, c(1, 2, NA)))))
})
})
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