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connection_pool_test.exs
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connection_pool_test.exs
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# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Gun.ConnectionPoolTest do
use Pleroma.DataCase
import Mox
import ExUnit.CaptureLog
alias Pleroma.Gun.ConnectionPool
defp gun_mock(_) do
Pleroma.GunMock
|> stub(:open, fn _, _, _ -> Task.start_link(fn -> Process.sleep(100) end) end)
|> stub(:await_up, fn _, _ -> {:ok, :http} end)
|> stub(:set_owner, fn _, _ -> :ok end)
:ok
end
setup :gun_mock
test "gives the same connection to 2 concurrent requests" do
Enum.map(
[
"http://www.korean-books.com.kp/KBMbooks/en/periodic/pictorial/20200530163914.pdf",
"http://www.korean-books.com.kp/KBMbooks/en/periodic/pictorial/20200528183427.pdf"
],
fn uri ->
uri = URI.parse(uri)
task_parent = self()
Task.start_link(fn ->
{:ok, conn} = ConnectionPool.get_conn(uri, [])
ConnectionPool.release_conn(conn)
send(task_parent, conn)
end)
end
)
[pid, pid] =
for _ <- 1..2 do
receive do
pid -> pid
end
end
end
test "connection limit is respected with concurrent requests" do
clear_config([:connections_pool, :max_connections]) do
clear_config([:connections_pool, :max_connections], 1)
# The supervisor needs a reboot to apply the new config setting
Process.exit(Process.whereis(Pleroma.Gun.ConnectionPool.WorkerSupervisor), :kill)
on_exit(fn ->
Process.exit(Process.whereis(Pleroma.Gun.ConnectionPool.WorkerSupervisor), :kill)
end)
end
capture_log(fn ->
Enum.map(
[
"https://ninenines.eu/",
"https://youtu.be/PFGwMiDJKNY"
],
fn uri ->
uri = URI.parse(uri)
task_parent = self()
Task.start_link(fn ->
result = ConnectionPool.get_conn(uri, [])
# Sleep so that we don't end up with a situation,
# where request from the second process gets processed
# only after the first process already released the connection
Process.sleep(50)
case result do
{:ok, pid} ->
ConnectionPool.release_conn(pid)
_ ->
nil
end
send(task_parent, result)
end)
end
)
[{:error, :pool_full}, {:ok, _pid}] =
for _ <- 1..2 do
receive do
result -> result
end
end
|> Enum.sort()
end)
end
end

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