test_that('DelayStack works', {
    rs <- r_session()
    rs(catcher <- new.env())
    rs(delay <- fiery:::DelayStack$new(app))
    expect_true(rs(delay$empty()))
    rs({delay$add({
        message('test')
        10
    }, function(res, ...) {
        catcher$res <- res + 10
    })})
    expect_false(rs(delay$empty()))
    expect_snapshot(rs(delay$eval()))
    expect_equal(rs(catcher$res), 20)
    expect_true(rs(delay$empty()))

    rs(delay$add({
        message('test2')
    }))
    expect_snapshot(rs(delay$eval()))

    expect_true(rs(delay$empty()))
    rs(id <- delay$add(10))
    expect_false(rs(delay$empty()))
    rs(delay$remove(id))
    expect_true(rs(delay$empty()))

    rs(delay$add(stop('error test')))
    rs(delay$add(5, function(res, ...) catcher$res <- res))
    expect_snapshot(rs(delay$eval()))
    expect_equal(rs(catcher$res), 5)

    rs(delay$add(NULL, function(...) stop('error test')))
    rs(delay$add(15, function(res, ...) catcher$res <- res))
    expect_snapshot(rs(delay$eval()))
    expect_equal(rs(catcher$res), 15)
})

test_that('TimeStack works', {
    rs <- r_session()
    rs(catcher <- new.env())
    rs(time <- fiery:::TimeStack$new(app))
    expect_true(rs(time$empty()))
    rs({time$add({
        message('test')
        10
    }, function(res, ...) {
        catcher$res <- res + 10
    }, after = 2)})
    expect_false(rs(time$empty()))
    expect_silent(rs(time$eval()))
    rs(Sys.sleep(3))
    expect_snapshot(rs(time$eval()))
    expect_equal(rs(catcher$res), 20)
    expect_true(rs(time$empty()))

    rs({time$add({
        message('test')
        10
    }, function(res, ...) {
        catcher$res <- res + 20
    }, after = 2)})
    rs(Sys.sleep(3))
    rs(time$reset())
    rs(time$eval())
    rs(Sys.sleep(3))
    expect_snapshot(rs(time$eval()))
    expect_equal(rs(catcher$res), 30)
    expect_true(rs(time$empty()))

    rs({id <- time$add({
        message('test')
        10
    }, function(res, ...) {
        catcher$res <- res + 30
    }, after = 2, loop = TRUE)})
    expect_silent(rs(time$eval()))
    rs(Sys.sleep(3))
    expect_snapshot(rs(time$eval()))
    expect_false(rs(time$empty()))
    expect_equal(rs(catcher$res), 40)
    expect_silent(rs(time$eval()))
    rs(Sys.sleep(3))
    expect_snapshot(rs(time$eval()))
    rs(time$remove(id))

    expect_true(rs(time$empty()))
    rs(id <- time$add(10, after = 1))
    expect_false(rs(time$empty()))
    rs(time$remove(id))
    expect_true(rs(time$empty()))
})