fun_list <- list(
  error, error_pct, error_abs,
  error_abs_pct, error_sqr
)
purrr::walk(fun_list, test_accuracy_error_handling)

test_that("error() works", {
  a <- rep(10, 7)
  b <- seq(13, 7, - 1)
  out <- error(a, b)

  expect_equal(out, c(- 3, - 2, - 1, 0, 1, 2, 3))
})

test_that("error_pct() works", {
  a <- rep(10, 7)
  b <- c(0, 5, 7.5, 10, 12.5, 15, 20)

  out <- error_pct(a, b)
  expected <- as_percent(c(1, 0.5, 0.25, 0, - 0.25, - 0.5, - 1))

  expect_equal(out, expected)
  expect_s3_class(out, c("lvmisc_percent", "vctrs_vctr"))
})

test_that("error_abs() works", {
  a <- rep(10, 7)
  b <- seq(13, 7, - 1)
  out <- error_abs(a, b)

  expect_equal(out, c(3, 2, 1, 0, 1, 2, 3))
})

test_that("error_abs_pct() works", {
  a <- rep(10, 7)
  b <- c(0, 5, 7.5, 10, 12.5, 15, 20)

  out <- error_abs_pct(a, b)
  expected <- as_percent(c(1, 0.5, 0.25, 0, 0.25, 0.5, 1))

  expect_equal(out, expected)
  expect_s3_class(out, c("lvmisc_percent", "vctrs_vctr"))
})

test_that("error_sqr() works", {
  a <- rep(10, 7)
  b <- seq(13, 7, - 1)
  out <- error_sqr(a, b)

  expect_equal(out, c(9, 4, 1, 0, 1, 4, 9))
})