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commanded test helpers wait.ex
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test/helpers/wait.ex

defmodule Commanded.Helpers.Wait do
@moduledoc false
def until(fun), do: until(500, fun)
def until(0, fun), do: fun.()
def until(timeout, fun) do
try do
fun.()
rescue
ExUnit.AssertionError ->
:timer.sleep(10)
until(max(0, timeout - 10), fun)
end
end
end