context("citation")
test_that("citations", {
  a <- move(x = 1:10, y = 1:10, time = as.POSIXct(1:10, origin = "1970-1-1"))
  expect_equal(citations(a), character())
  citations(a) <- "bla"
  expect_equal(citations(a), "bla")
  expect_error(citations(a) <- factor("a"))
  expect_warning(citations(a) <- c("a", "a"))
})
test_that("citations move function", {
  expect_warning(
    q <- move(1:10, 1:10, Sys.time() + 1:10, animal = gl(5, 2), data = data.frame(citation = gl(5, 2))),
    "There were more than one citation for this study found! Only using the first."
  )
  expect_equal(citations(q), "1")
})