# basic operations

test_that("addAvgElement works correctly", {
  # average of one element yields same values
  x <- addAvgElement(feixas2004, "AVG", i = 1)
  R <- ratings(x[, c(1, 14)])
  expect_equal(R[, 1], R[, 2])

  # error is thrown if i is out of range
  expect_error({
    x <- addAvgElement(feixas2004, "AVG", i = 0)
  })
  expect_error({
    x <- addAvgElement(feixas2004, "AVG", i = 16)
  })
  expect_error({
    x <- addAvgElement(feixas2004, "AVG", i = 1:16)
  })
  # existing element name
  expect_error({
    x <- addAvgElement(feixas2004, "Mother", i = 1:16)
  })

  # duplicate indexes generate warning
  expect_warning({
    x <- addAvgElement(feixas2004, "AVG", i = c(1, 1, 2))
  })
})


test_that("stop_if_not_is_repgrid works correctly", {
  expect_error(
    stop_if_not_is_repgrid("a")
  )

  expect_error(
    stop_if_not_is_repgrid("a", "some_name")
  )
})


test_that("reverse works correctly", {
  expect_equal(swapPoles(boeker), reverse(boeker))

  ii <- c(1, 4, 6)
  expect_equal(swapPoles(boeker, ii), reverse(boeker, ii))
})