edf50fdf80
- Run mix credo --all to identify possible code optimizations - Resolve most of the errors generated by credo such as: - Numbers larger than 9999 should be written with underscores: 58_127 - Modules should have a @moduledoc tag - Comparison will always return true
61 lines
1.3 KiB
Elixir
61 lines
1.3 KiB
Elixir
defmodule Tasks do
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@moduledoc false
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use Koans
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@intro "Tasks"
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koan "Tasks can be used for asynchronous computations with results" do
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task = Task.async(fn -> 3 * 3 end)
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do_other_stuff()
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assert Task.await(task) + 1 == ___
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end
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koan "If you don't need a result, use start_link/1" do
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{result, _pid} = Task.start_link(fn -> 1 + 1 end)
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assert result == ___
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end
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koan "Yield returns nil if the task isn't done yet" do
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handle =
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Task.async(fn ->
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:timer.sleep(100)
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3 * 3
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end)
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assert Task.yield(handle, 10) == ___
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end
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koan "Tasks can be aborted with shutdown" do
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handle =
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Task.async(fn ->
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:timer.sleep(100)
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3 * 3
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end)
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%Task{pid: pid} = handle
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Task.shutdown(handle)
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assert Process.alive?(pid) == ___
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end
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koan "Shutdown will give you an answer if it has it" do
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handle = Task.async(fn -> 3 * 3 end)
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:timer.sleep(10)
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assert Task.shutdown(handle) == {:ok, ___}
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end
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koan "You can yield to multiple tasks at once and extract the results" do
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squares =
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[1, 2, 3, 4]
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|> Enum.map(fn number -> Task.async(fn -> number * number end) end)
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|> Task.yield_many(100)
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|> Enum.map(fn {_task, {:ok, result}} -> result end)
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assert squares == ___
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end
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def do_other_stuff do
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:timer.sleep(50)
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end
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end
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