tar_test("NULL name outside target", {
  expect_error(tar_timestamp(), class = "tar_condition_validate")
})

tar_test("empty timestamp", {
  out <- tar_timestamp(y)
  expect_true(inherits(out, "POSIXct"))
  expect_identical(as.numeric(out), as.numeric(file_time_reference))
})

tar_test("empty file", {
  tar_script(tar_target(y, 1))
  tar_make(callr_function = NULL)
  unlink(path_objects(path_store_default(), "y"))
  out <- tar_timestamp(y)
  expect_true(inherits(out, "POSIXct"))
  expect_true(as.numeric(out) > as.numeric(file_time_reference))
})

tar_test("empty meta", {
  tar_script(tar_target(y, 1))
  tar_make(callr_function = NULL)
  unlink(path_meta(path_store_default()))
  out <- tar_timestamp(y)
  expect_true(inherits(out, "POSIXct"))
  expect_identical(as.numeric(out), as.numeric(file_time_reference))
})

tar_test("good timestamp outside target", {
  tar_script(tar_target(y, 1))
  tar_make(callr_function = NULL)
  out <- tar_timestamp(y)
  expect_true(inherits(out, "POSIXct"))
  expect_false(any(as.numeric(out) == as.numeric(file_time_reference)))
})

tar_test("one timestamp for two files", {
  tar_script(
    tar_target(
      y, {
        file.create(c("x", "y"))
        c("x", "y")
      }
    )
  )
  tar_make(callr_function = NULL)
  expect_equal(tar_read(y), c("x", "y"))
  expect_true(all(file.exists(c("x", "y"))))
  out <- tar_timestamp(y)
  expect_true(inherits(out, "POSIXct"))
  expect_false(any(as.numeric(out) == as.numeric(file_time_reference)))
  expect_equal(length(out), 1L)
})

tar_test("use timestamp in a target", {
  tar_script(
    list(
      tar_target(
        y, {
          tar_cancel(Sys.time() - tar_timestamp() < 360)
          tar_timestamp()
        },
        cue = tar_cue(mode = "always")
      )
    )
  )
  tar_make(callr_function = NULL)
  out <- tar_read(y)
  expect_true(inherits(out, "POSIXct"))
  expect_identical(as.numeric(out), as.numeric(file_time_reference))
  progress <- tar_progress()
  expect_equal(progress$progress[progress$name == "y"], "built")
  tar_make(callr_function = NULL)
  progress <- tar_progress()
  expect_equal(progress$progress[progress$name == "y"], "canceled")
})

tar_test("custom script and store args", {
  skip_cran()
  expect_equal(tar_config_get("script"), path_script_default())
  expect_equal(tar_config_get("store"), path_store_default())
  tar_script({
    list(
      tar_target(w, letters)
    )
  }, script = "example/script.R")
  tar_make(
    callr_function = NULL,
    script = "example/script.R",
    store = "example/store"
  )
  out <- tar_timestamp(w, store = "example/store")
  expect_true(inherits(out, "POSIXct"))
  expect_false(file.exists("_targets.yaml"))
  expect_equal(tar_config_get("script"), path_script_default())
  expect_equal(tar_config_get("store"), path_store_default())
  expect_false(file.exists(path_script_default()))
  expect_false(file.exists(path_store_default()))
  expect_true(file.exists("example/script.R"))
  expect_true(file.exists("example/store"))
  expect_true(file.exists("example/store/meta/meta"))
  expect_true(file.exists("example/store/objects/w"))
  tar_config_set(script = "x")
  expect_equal(tar_config_get("script"), "x")
  expect_true(file.exists("_targets.yaml"))
})

tar_test("deprecated arguments", {
  x <- "tar_condition_deprecate"
  expect_warning(tar_timestamp(x, format = "123"), class = x)
  expect_warning(tar_timestamp(x, tz = "UTC"), class = x)
  expect_warning(tar_timestamp(x, parse = TRUE), class = x)
})