1 files changed, 68 insertions, 0 deletions
diff --git a/test/pleroma/web/endpoint/metrics_exporter_test.exs b/test/pleroma/web/endpoint/metrics_exporter_test.exs
new file mode 100644
index 000000000..875addc96
--- /dev/null
+++ b/test/pleroma/web/endpoint/metrics_exporter_test.exs
@@ -0,0 +1,68 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Endpoint.MetricsExporterTest do
+  use Pleroma.Web.ConnCase
+
+  alias Pleroma.Web.Endpoint.MetricsExporter
+
+  defp config do
+    Application.get_env(:prometheus, MetricsExporter)
+  end
+
+  describe "with default config" do
+    test "does NOT expose app metrics", %{conn: conn} do
+      conn
+      |> get(config()[:path])
+      |> json_response(404)
+    end
+  end
+
+  describe "when enabled" do
+    setup do
+      initial_config = config()
+      on_exit(fn -> Application.put_env(:prometheus, MetricsExporter, initial_config) end)
+
+      Application.put_env(
+        :prometheus,
+        MetricsExporter,
+        Keyword.put(initial_config, :enabled, true)
+      )
+    end
+
+    test "serves app metrics", %{conn: conn} do
+      conn = get(conn, config()[:path])
+      assert response = response(conn, 200)
+
+      for metric <- [
+            "http_requests_total",
+            "http_request_duration_microseconds",
+            "phoenix_controller_call_duration",
+            "telemetry_scrape_duration",
+            "erlang_vm_memory_atom_bytes_total"
+          ] do
+        assert response =~ ~r/#{metric}/
+      end
+    end
+
+    test "when IP whitelist configured, " <>
+           "serves app metrics only if client IP is whitelisted",
+         %{conn: conn} do
+      Application.put_env(
+        :prometheus,
+        MetricsExporter,
+        Keyword.put(config(), :ip_whitelist, ["127.127.127.127", {1, 1, 1, 1}, '255.255.255.255'])
+      )
+
+      conn
+      |> get(config()[:path])
+      |> json_response(404)
+
+      conn
+      |> Map.put(:remote_ip, {127, 127, 127, 127})
+      |> get(config()[:path])
+      |> response(200)
+    end
+  end
+end