test_that("full_path gives correct values", {

  skip_on_cran()

  if (is_windows()) {
    # Will be something like "C:"
    drive <- substring(getwd(), 1, 2)
  } else {
    # Use "" so that file.path("", "a") will return "/a"
    drive <- ""
  }

  expect_identical(full_path("/a/b"), file.path(drive, "a/b"))
  expect_identical(full_path("/a/b/"), file.path(drive, "a/b"))
  expect_identical(full_path("/"), file.path(drive, ""))
  expect_identical(full_path("a"), file.path(getwd(), "a"))
  expect_identical(full_path("a/b"), file.path(getwd(), "a/b"))

  expect_identical(full_path("a/../b/c"), file.path(getwd(), "b/c"))
  expect_identical(
    full_path(
      "../../../../../../../../../../../../../../../../../../../../../../../a"),
    file.path(drive, "a"))
  expect_identical(full_path("/../.././a"), file.path(drive, "a"))
  expect_identical(full_path("/a/./b/../c"), file.path(drive, "a/c"))

  expect_identical(full_path("~nonexistent_user"), file.path(getwd(), "~nonexistent_user"))
  expect_identical(
    full_path("~/a/../b"),
    # On Windows, path.expand() can return a path with backslashes
    gsub("\\", "/", path.expand("~/b"), fixed = TRUE)
  )

  expect_identical(full_path("a//b"), file.path(getwd(), "a/b"))
  expect_identical(full_path("/a//b"), file.path(drive, "a/b"))
})

test_that("full_path gives correct values, windows", {
  skip_other_platforms("windows")

  # Backslash separators
  expect_identical(full_path("f:\\a/b"), "f:/a/b")
  expect_identical(full_path("a\\b"), file.path(getwd(), "a/b"))
  expect_identical(full_path("a\\\\b"), file.path(getwd(), "a/b"))
  expect_identical(full_path("\\\\a\\b"), "//a/b")
  expect_identical(full_path("\\\\a/b/..\\c"), "//a/c")

  # Drives
  expect_identical(full_path("f:/a/b"), "f:/a/b")
  expect_identical(full_path("f:/a/b/../../.."), "f:/")
  expect_identical(full_path("f:/../a"), "f:/a")
  expect_identical(full_path("f:/"), "f:/")
  expect_identical(full_path("f:"), "f:/")

  # Leading double slashes. Server name always has trailing slash ("//server/"),
  # like drives do ("f:/"). But dirs on the server don't have a trailing slash.
  expect_identical(full_path("//a"), "//a/")
  expect_identical(full_path("//a/"), "//a/")
  expect_identical(full_path("//a/b"), "//a/b")
  expect_identical(full_path("//a/b/.."), "//a/")
  # Can't go .. to remove the server name
  expect_identical(full_path("//a/b/../.."), "//a/")
  expect_identical(full_path("//a/../b"), "//a/b")
  expect_error(full_path("//"))
  expect_error(full_path("///"))
  expect_error(full_path("///a"))
})

test_that("full_path gives correct values, unix", {
  skip_other_platforms("unix")

  # Leading double slashes should collapse
  expect_identical(full_path("//"), "/")
  expect_identical(full_path("///a/"), "/a")
})

test_that("do_echo_cmd", {
  skip_other_platforms("unix")

  expect_output(
    withr::with_options(
      list(width = 20),
      do_echo_cmd("command", rep("a r g x", 3))
    ),
    "Running command \\\n  'a r g x' \\\n  'a r g x' \\\n  'a r g x'",
    fixed = TRUE
  )
})

test_that("sh_quote_smart", {

  cases <- list(
    list(c("foo", "bar")),
    list(character()),
    list("foo"),
    list(""),
    list("foo/bar123_-"),

    list("foo bar", shQuote("foo bar")),
    list(c("foo", "1 2"), c("foo", shQuote("1 2")))
  )

  for (c in cases) expect_equal(sh_quote_smart(c[[1]]), c[[length(c)]])
})

test_that("base64", {
  expect_equal(base64_encode(charToRaw("foobar")), "Zm9vYmFy")
  expect_equal(base64_encode(charToRaw(" ")), "IA==")
  expect_equal(base64_encode(charToRaw("")), "")

  x <- charToRaw(paste(sample(letters, 10000, replace = TRUE), collapse = ""))
  expect_equal(base64_decode(base64_encode(x)), x)

  for (i in 5:32) {
    mtcars2 <- unserialize(base64_decode(base64_encode(
      serialize(mtcars[1:i, ], NULL))))
    expect_identical(mtcars[1:i,], mtcars2)
  }
})