replace erlang cowboy ws server with elixir equivalent

Author: the-mikedavis

mix.exs

@@ -15,7 +15,6 @@ defmodule MintWebSocket.MixProject do
       version: @version,
       elixir: "~> 1.8",
       elixirc_paths: elixirc_paths(Mix.env()),
-      erlc_paths: erlc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       test_coverage: [tool: ExCoveralls],
@@ -44,6 +43,11 @@ defmodule MintWebSocket.MixProject do
   defp deps do
     [
       {:mint, "~> 1.0"},
+      # for running the :http2 tests (mix test --include http2)
+      # {:mint,
+      #  git: "https://github.com/elixir-mint/mint.git",
+      #  ref: "488a6ba5fd418a52f697a8d5f377c629ea96af92",
+      #  override: true},
       {:ex_doc, "~> 0.24", only: [:dev], runtime: false},
       {:castore, ">= 0.0.0", only: [:dev]},
       {:jason, ">= 0.0.0", only: [:dev, :test]},
@@ -57,9 +61,6 @@ defmodule MintWebSocket.MixProject do
   defp elixirc_paths(:test), do: ["lib", "test/fixtures"]
   defp elixirc_paths(_), do: ["lib"]
 
-  defp erlc_paths(:test), do: ["src", "test/fixtures"]
-  defp erlc_paths(_), do: ["src"]
-
   defp package do
     [
       name: "mint_web_socket",

test/fixtures/h2cowboy/websocket_sup.erl

@@ -0,0 +1,23 @@
+defmodule WebsocketHandler do
+  @moduledoc """
+  An example websocket handler for cowboy with compression enabled
+  """
+
+  @behaviour :cowboy_websocket
+
+  @impl :cowboy_websocket
+  def init(req, state) do
+    {:cowboy_websocket, req, state, %{compress: true}}
+  end
+
+  @impl :cowboy_websocket
+  def websocket_init(state), do: {[], state}
+
+  @impl :cowboy_websocket
+  def websocket_handle({:text, msg}, state), do: {[text: msg], state}
+
+  def websocket_handle(_data, state), do: {[], state}
+
+  @impl :cowboy_websocket
+  def websocket_info(_info, state), do: {[], state}
+end

test/fixtures/h2cowboy/ws_h.erl

@@ -0,0 +1,27 @@
+defmodule WebsocketSupervisor do
+  @moduledoc """
+  A supervisor for the WebsocketHandler
+  """
+
+  use Supervisor
+
+  def start_link(_opts) do
+    dispatch =
+      :cowboy_router.compile([
+        {:_,
+         [
+           {'/', WebsocketHandler, []}
+         ]}
+      ])
+
+    {:ok, _} =
+      :cowboy.start_clear(:http, [port: 7070], %{
+        env: %{dispatch: dispatch},
+        enable_connect_protocol: true
+      })
+
+    Supervisor.start_link([], strategy: :one_for_one)
+  end
+
+  def init(_opts), do: {:ok, nil}
+end

test/fixtures/websocket_handler.ex

@@ -51,6 +51,8 @@ defmodule Mint.WebSocketTest do
 
   describe "given an HTTP/2 connection to an echo server" do
     setup do
+      start_supervised!(WebsocketSupervisor)
+
       {:ok, conn} = Mint.HTTP.connect(:http, "localhost", 7070, protocols: [:http2])
 
       [conn: conn]

test/fixtures/websocket_supervisor.ex

@@ -1,3 +1,2 @@
-:websocket_sup.start_link()
 ExUnit.configure(assert_receive_timeout: 500, exclude: [:http2, compression: :stress])
 ExUnit.start()