tests/testthat/test-backend-odbc.R

In tidyverse/dbplyr: A 'dplyr' Back End for Databases

test_that("custom scalar translated correctly", {
  local_con(simulate_odbc())

  expect_equal(test_translate_sql(as.numeric(x)),            sql("CAST(`x` AS DOUBLE)"))
  expect_equal(test_translate_sql(as.double(x)),             sql("CAST(`x` AS DOUBLE)"))
  expect_equal(test_translate_sql(as.integer(x)),            sql("CAST(`x` AS INT)"))
  expect_equal(test_translate_sql(as.character(x)),          sql("CAST(`x` AS STRING)"))
})

test_that("custom aggregators translated correctly", {
  local_con(simulate_odbc())

  expect_equal(
    test_translate_sql(sd(x, na.rm = TRUE), window = FALSE),
    sql("STDDEV_SAMP(`x`)")
  )
})

test_that("custom window functions translated correctly", {
  local_con(simulate_odbc())

  expect_equal(
    test_translate_sql(sd(x, na.rm = TRUE)),
    sql("STDDEV_SAMP(`x`) OVER ()")
  )
})