54 lines
1.3 KiB
Elixir
54 lines
1.3 KiB
Elixir
defmodule Processes do
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use Koans
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koan "tests run in a process!" do
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assert Process.alive?(self)
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end
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koan "can spew out information about a process" do
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information = Process.info(self)
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assert information[:status] == :running
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end
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koan "process can send messages to itself" do
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send self(), "hola!"
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receive do
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message -> assert message == "hola!"
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end
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end
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koan "a spawned process is independent of the current process" do
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pid = spawn(fn -> receive do
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{:hello, thing} -> assert thing == "world"
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_ -> assert false
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end
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end)
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send pid, {:hello, "world"}
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end
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koan "a common pattern is to include the sender in the message" do
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pid = spawn(fn -> receive do
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{:hello, sender} -> send sender, :how_are_you?
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_ -> assert false
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end
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end)
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send pid, {:hello, self()}
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assert_receive :how_are_you?
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end
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koan "you don't have to wait forever for messages" do
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parent = self
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spawn(fn -> receive do
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_ -> assert false
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after
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10 -> send parent, {:waited_too_long, "I am inpatient"}
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end
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end)
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assert_receive {:waited_too_long, "I am inpatient"}
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end
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end
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