akkoma/test/pleroma/http/backoff_test.exs

106 lines
3.8 KiB
Elixir

defmodule Pleroma.HTTP.BackoffTest do
@backoff_cache :http_backoff_cache
use Pleroma.DataCase, async: false
alias Pleroma.HTTP.Backoff
defp within_tolerance?(ttl, expected) do
ttl > expected - 15 and ttl < expected + 15
end
describe "get/3" do
test "should return {:ok, env} when not rate limited" do
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://akkoma.dev/api/v1/instance"} ->
{:ok, %Tesla.Env{status: 200, body: "ok"}}
end)
assert {:ok, env} = Backoff.get("https://akkoma.dev/api/v1/instance")
assert env.status == 200
end
test "should return {:error, env} when rate limited" do
# Shove a value into the cache to simulate a rate limit
Cachex.put(@backoff_cache, "akkoma.dev", true)
assert {:error, :ratelimit} = Backoff.get("https://akkoma.dev/api/v1/instance")
end
test "should insert a value into the cache when rate limited" do
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://ratelimited.dev/api/v1/instance"} ->
{:ok, %Tesla.Env{status: 429, body: "Rate limited"}}
end)
assert {:error, :ratelimit} = Backoff.get("https://ratelimited.dev/api/v1/instance")
assert {:ok, true} = Cachex.get(@backoff_cache, "ratelimited.dev")
end
test "should insert a value into the cache when rate limited with a 503 response" do
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://ratelimited.dev/api/v1/instance"} ->
{:ok, %Tesla.Env{status: 503, body: "Rate limited"}}
end)
assert {:error, :ratelimit} = Backoff.get("https://ratelimited.dev/api/v1/instance")
assert {:ok, true} = Cachex.get(@backoff_cache, "ratelimited.dev")
end
test "should parse the value of x-ratelimit-reset, if present" do
ten_minutes_from_now =
DateTime.utc_now() |> Timex.shift(minutes: 10) |> DateTime.to_iso8601()
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://ratelimited.dev/api/v1/instance"} ->
{:ok,
%Tesla.Env{
status: 429,
body: "Rate limited",
headers: [{"x-ratelimit-reset", ten_minutes_from_now}]
}}
end)
assert {:error, :ratelimit} = Backoff.get("https://ratelimited.dev/api/v1/instance")
assert {:ok, true} = Cachex.get(@backoff_cache, "ratelimited.dev")
{:ok, ttl} = Cachex.ttl(@backoff_cache, "ratelimited.dev")
assert within_tolerance?(ttl, 600)
end
test "should parse the value of retry-after when it's a timestamp" do
ten_minutes_from_now =
DateTime.utc_now() |> Timex.shift(minutes: 10) |> DateTime.to_iso8601()
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://ratelimited.dev/api/v1/instance"} ->
{:ok,
%Tesla.Env{
status: 429,
body: "Rate limited",
headers: [{"retry-after", ten_minutes_from_now}]
}}
end)
assert {:error, :ratelimit} = Backoff.get("https://ratelimited.dev/api/v1/instance")
assert {:ok, true} = Cachex.get(@backoff_cache, "ratelimited.dev")
{:ok, ttl} = Cachex.ttl(@backoff_cache, "ratelimited.dev")
assert within_tolerance?(ttl, 600)
end
test "should parse the value of retry-after when it's a number of seconds" do
Tesla.Mock.mock_global(fn
%Tesla.Env{url: "https://ratelimited.dev/api/v1/instance"} ->
{:ok,
%Tesla.Env{
status: 429,
body: "Rate limited",
headers: [{"retry-after", "600"}]
}}
end)
assert {:error, :ratelimit} = Backoff.get("https://ratelimited.dev/api/v1/instance")
assert {:ok, true} = Cachex.get(@backoff_cache, "ratelimited.dev")
# assert that the value is 10 minutes from now
{:ok, ttl} = Cachex.ttl(@backoff_cache, "ratelimited.dev")
assert within_tolerance?(ttl, 600)
end
end
end