add test for rendering feedback form in plug app

Author: mitchellhenke

test/plug_capture_test.exs

@@ -138,4 +138,30 @@ defmodule Sentry.PlugCaptureTest do
     assert body =~ event_id
     assert body =~ ~s{"title":"Testing"}
   end
+
+  test "can render feedback form in Plug application" do
+    bypass = Bypass.open()
+
+    Bypass.expect(bypass, fn conn ->
+      {:ok, body, conn} = Plug.Conn.read_body(conn)
+      _json = Jason.decode!(body)
+      Plug.Conn.resp(conn, 200, ~s<{"id": "340"}>)
+    end)
+
+    modify_env(:sentry, dsn: "http://public:secret@localhost:#{bypass.port}/1")
+
+    conn = conn(:get, "/error_route")
+
+    assert_raise(Plug.Conn.WrapperError, "** (RuntimeError) Error", fn ->
+      Sentry.ExamplePlugApplication.call(conn, [])
+    end)
+
+    {event_id, _} = Sentry.last_event_id_and_source()
+
+    assert_received {:plug_conn, :sent}
+    assert {500, _headers, body} = sent_resp(conn)
+    assert body =~ "sentry-cdn"
+    assert body =~ event_id
+    assert body =~ ~s{"title":"Testing"}
+  end
 end

test/support/example_plug_application.ex

@@ -1,6 +1,7 @@
 defmodule Sentry.ExamplePlugApplication do
-  use Sentry.PlugCapture
   use Plug.Router
+  use Sentry.PlugCapture
+  use Plug.ErrorHandler
 
   plug Plug.Parsers, parsers: [:multipart, :urlencoded]
   plug Sentry.PlugContext
@@ -29,4 +30,26 @@ defmodule Sentry.ExamplePlugApplication do
     _ = conn
     raise RuntimeError, "Error"
   end
+
+  def handle_errors(conn, %{kind: _kind, reason: _reason, stack: _stack}) do
+    response = case Sentry.last_event_id_and_source() do
+      {event_id, :plug} ->
+        opts =
+          %{title: "Testing", eventId: event_id}
+          |> Jason.encode!()
+
+        """
+        <script src="https://browser.sentry-cdn.com/5.9.1/bundle.min.js" integrity="sha384-/x1aHz0nKRd6zVUazsV6CbQvjJvr6zQL2CHbQZf3yoLkezyEtZUpqUNnOLW9Nt3v" crossorigin="anonymous"></script>
+        <script>
+        Sentry.init({ dsn: '#{Sentry.Config.dsn()}' });
+        Sentry.showReportDialog(#{opts})
+        </script>
+        """
+
+      _ ->
+        "error"
+    end
+
+    send_resp(conn, conn.status, response)
+  end
 end