expect_configs <- function(runner, setup, ignore, package) {

  if (all(!runner, !setup, !ignore, !package)) {
    expect_error(
      use_shinytest2(
        app_dir = ".",
        runner = FALSE,
        setup = FALSE,
        ignore = FALSE,
        package = FALSE
      ),
      "At least one of", fixed = TRUE
    )
    return()
  }

  app_dir <- tempfile("st2-test")
  fs::dir_create(app_dir)
  withr::defer(fs::dir_delete(app_dir))

  if (package || ignore) {
    # Set up DESCRIPTION file
    write.dcf(list(
      "Package" = "testshinytest2",
      "Title" = "Test for ShinyTest2"
    ), fs::path(app_dir, "DESCRIPTION"))
  }
  if (ignore) {
    # Set up .Rbuildignore file
    cat("", file = fs::path(app_dir, ".Rbuildignore"))
  }

  info <- paste0(
    "runner = ", runner, "\n",
    "setup = ", setup, "\n",
    "ignore = ", ignore, "\n",
    "package = ", package
  )

  capture.output({
    use_shinytest2(app_dir = app_dir, runner = runner, setup = setup, ignore = ignore, package = package)
  }, type = "message")

  testthat::expect_equal(file.exists(file.path(app_dir, "tests/testthat.R")), runner, info = info)

  testthat::expect_equal(file.exists(file.path(app_dir, "tests/testthat/setup-shinytest2.R")), setup, info = info)

  testthat::expect_equal(file.exists(file.path(app_dir, ".gitignore")), ignore, info = info)
  testthat::expect_equal(file.exists(file.path(app_dir, ".Rbuildignore")), ignore, info = info)

  testthat::expect_equal(file.exists(file.path(app_dir, "DESCRIPTION")), package || ignore, info = info)
  if (file.exists(file.path(app_dir, "DESCRIPTION"))) {
    suggests <- as.list(read.dcf(fs::path(app_dir, "DESCRIPTION"))[1, ])$Suggests
    wrapper <- if (package) testthat::expect_success else testthat::expect_failure
    wrapper(
      testthat::expect_equal(suggests, "shinytest2", info = info)
    )
  }

}

test_that("use_shinytest2() sets up configs for all configurations", {
  skip_if_not_installed("usethis")

  dt <- expand.grid(runner = c(TRUE, FALSE), setup = c(TRUE, FALSE), ignore = c(TRUE, FALSE), package = c(TRUE, FALSE))
  Map(
    dt$runner,
    dt$setup,
    dt$ignore,
    dt$package,
    f = expect_configs
  )

})

test_that("use_shinytest2_setup() creates a file with no warnings when being read", {
  temp_dir <- tempfile("st2-test")
  fs::dir_create(temp_dir)

  expect_warning({

    use_shinytest2_setup(temp_dir, quiet = TRUE)
    readLines(file.path(temp_dir, "tests/testthat/setup-shinytest2.R"))
  }, NA)
})