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prometheus_phx_test.exs
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prometheus_phx_test.exs
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defmodule PrometheusPhxTest do
use PrometheusPhxTestWeb.ConnCase
use PrometheusPhxTestWeb.ChannelCase
import ExUnit.CaptureLog, only: [capture_log: 1]
require Prometheus.Registry
require Logger
alias Prometheus.Metric.Histogram
describe "Channel tests" do
test "joining a channel" do
socket = socket(PrometheusPhxTestWeb.TestSocket)
assert {:ok, _payload, socket} =
subscribe_and_join(socket, PrometheusPhxTestWeb.TestChannel, "qwe:qwa")
assert {buckets, sum} =
Histogram.value(
name: :phoenix_channel_join_duration_microseconds,
labels: [PrometheusPhxTestWeb.TestChannel, "qwe:qwa", :channel_test]
)
assert sum > 200_000 and sum < 300_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
assert ref = Phoenix.ChannelTest.push(socket, "invite", %{"name" => "Bob Dobbs"})
assert_reply(ref, :ok, %{"name" => "Bob Dobbs"}, 1000)
assert {buckets, sum} =
Histogram.value(
name: :phoenix_channel_receive_duration_microseconds,
labels: [
PrometheusPhxTestWeb.TestChannel,
"qwe:qwa",
:channel_test,
"invite"
]
)
assert sum > 500_000 and sum < 600_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
end
end
describe "Controller tests" do
test "GET /", %{conn: conn} do
conn = get(conn, "/")
assert html_response(conn, 200) =~ "Welcome to PrometheusPhx!"
assert {buckets, sum} =
Histogram.value(
name: :phoenix_controller_call_duration_microseconds,
labels: [:index, PrometheusPhxTestWeb.PageController, 200]
)
assert sum > 1_000_000 and sum < 1_200_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
end
test "GET /error-422", %{conn: conn} do
conn = get(conn, "/error-422")
assert html_response(conn, 422) =~ "Bad Request"
assert {buckets, sum} =
Histogram.value(
name: :phoenix_controller_call_duration_microseconds,
labels: [:error, PrometheusPhxTestWeb.PageController, 422]
)
assert sum > 1_000_000 and sum < 1_200_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
end
test "GET /raise-error", %{conn: conn} do
assert capture_log(fn ->
try do
get(conn, "/raise-error")
rescue
_e in RuntimeError ->
Logger.error("Internal Server Error")
end
end) =~ "Internal Server Error"
assert {buckets, sum} =
Histogram.value(
name: :phoenix_controller_call_duration_microseconds,
labels: [:raise_error, PrometheusPhxTestWeb.PageController, 500]
)
assert sum > 1_000_000 and sum < 1_200_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
assert {buckets, sum} =
Histogram.value(
name: :phoenix_controller_error_rendered_duration_microseconds,
labels: [:raise_error, PrometheusPhxTestWeb.PageController, 500]
)
assert sum > 1 and sum < 5_000
assert 1 = Enum.reduce(buckets, fn x, acc -> x + acc end)
end
end
end

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