## Unit tests for lfast() function

test_that("lfast produces correct length and bounded output", {
  set.seed(123) # for reproducibility
  x <- lfast(
    n = 256,
    mean = 4.5,
    sd = 1.0,
    lowerbound = 1,
    upperbound = 7,
    items = 5
  )

  # Check the length of the output
  expect_length(x, 256)

  # Check if the values are within the specified bounds
  expect_true(all(x >= 1 & x <= 7))

  # Check if moments are within tolerance bounds
  expect_true(abs(mean(x) - 4.5) < 0.1)
  expect_true(abs(sd(x) - 1.0) < 0.1)
})


test_that("lfast runs silently with valid inputs", {
  set.seed(123)
  expect_no_warning(lfast(
    n = 64,
    mean = 4.5,
    sd = 1.0,
    lowerbound = 1,
    upperbound = 7,
    items = 5
  ))
})


test_that("lfast throws an error with invalid inputs", {
  expect_error(
    lfast(
      n = -1,
      mean = 4.5,
      sd = 1.0,
      lowerbound = 1,
      upperbound = 7,
      items = 5
    )
  )
})