test_that("different_sha returns TRUE if remote or local sha is NA not found", {
  expect_true(different_sha(remote_sha = NA, local_sha = "4a2ea2"))
  expect_true(different_sha(remote_sha = "4a2ea2", local_sha = NA))
  expect_true(different_sha(remote_sha = NA, local_sha = NA))
})

test_that("different_sha returns TRUE if remote_sha and local_sha are different", {
  expect_true(different_sha(remote_sha = "5b3fb3", local_sha = "4a2ea2"))
})

test_that("different_sha returns FALSE if remote_sha and local_sha are the same", {
  expect_false(different_sha(remote_sha = "4a2ea2", local_sha = "4a2ea2"))
})

test_that("local_sha returns NA if package is not installed", {
  expect_equal(local_sha("tsrtarst"), NA_character_)
})

test_that("package2remotes looks for the DESCRIPTION in .libPaths", {

  skip_on_cran()
  skip_if_offline()
  skip_if_over_rate_limit()

  lib <- tempfile()
  dir.create(lib)
  expect_equal(package2remote("noremotes", lib = lib)$sha, NA_character_)

  # This is not a real package, so we can't actually build it
  install("noremotes", lib = lib, quiet = TRUE, build = FALSE,
          dependencies = FALSE,
          upgrade = FALSE,
          force = FALSE,
          build_opts = c("--no-resave-data", "--no-manual", "--no-build-vignettes"),
          repos = getOption("repos"),
          type = getOption("pkgType"))

  expect_equal(package2remote("noremotes", lib = lib)$sha, "1.0.0")

  # Load the namespace, as packageDescription looks in loaded namespaces
  # first.
  withr::with_libpaths(lib,
    loadNamespace("noremotes")
  )

  expect_equal(package2remote("noremotes")$sha, NA_character_)
})