test_that("bin_space() works", {
  occdf <- tetrapods
  lng <- "lng"
  lat <- "lat"
  spacing <- 1000
  sub_grid <- 250
  return <- FALSE
  plot <- FALSE

  # Expect equal
  expect_equal(
    nrow(bin_space(occdf = tetrapods, spacing = 250,
                     plot = TRUE)),
      nrow(tetrapods))
  expect_equal(
    nrow(bin_space(occdf = tetrapods, spacing = 1000, sub_grid = 250,
                     plot = TRUE)),
    nrow(tetrapods))

  # Expect true
  expect_true(
    is.list(
      bin_space(
        occdf = tetrapods, spacing = 250, return = TRUE,
        plot = TRUE)))

  expect_true(
    is.list(
      bin_space(
        occdf = tetrapods, spacing = 500, sub_grid = 200, return = TRUE,
        plot = TRUE)))

  # Error handling
  expect_error(bin_space(occdf = matrix(tetrapods)))
  expect_error(bin_space(occdf = tetrapods, lng = "long", lat = "latit"))
  expect_error(bin_space(occdf = tetrapods, spacing = 1000, sub_grid = 1000))
  expect_error(bin_space(occdf = tetrapods, spacing = NA))
  expect_error(bin_space(occdf = tetrapods, spacing = 1000, sub_grid = NA))
  expect_error(bin_space(occdf = tetrapods, return = "TRUE"))
  tetrapods$lat[1] <- 94
  expect_error(bin_space(occdf = tetrapods))
  tetrapods$lat[1] <- "94"
  expect_error(bin_space(occdf = tetrapods))
  tetrapods$lng[1] <- 184
  expect_error(bin_space(occdf = tetrapods))
})