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我开始了一个新项目并像这样配置它：

mix new example
cd example

我清空了“lib/example.ex”并在其中放置了以下代码：

Application.start :hound

defmodule Example do
  use Hound.Helpers

  def run do
    Hound.start_session

    navigate_to "http://akash.im"
    IO.inspect page_title()

    # Automatically invoked if the session owner process crashes
    Hound.end_session
  end
end

Example.run

这是https://github.com/HashNuke/hound/blob/master/notes/simple-browser-automation.md提供的示例代码

brew install selenium-server-standalone然后我通过（我在 MacOS 上）安装了 Selenium 服务器，通过启动它brew services start selenium-server-standalone并添加config :hound, driver: "selenium"到config/config.exs

我添加Application.ensure_all_started(:hound)为test/test_helper.exs.

最后，我添加{:hound, "~> 1.0"}到 mix.exs 并运行mix test. 那是当我收到以下编译错误时：

localhost:example alex$ mix test
===> Compiling parse_trans
===> Compiling mimerl
===> Compiling metrics
===> Compiling unicode_util_compat
===> Compiling idna
==> jason
Compiling 8 files (.ex)
Generated jason app
==> ssl_verify_fun
Compiling 7 files (.erl)
Generated ssl_verify_fun app
===> Compiling certifi
===> Compiling hackney
==> hound
Compiling 37 files (.ex)
Generated hound app
==> example
Compiling 1 file (.ex)

== Compilation error in file lib/example.ex ==
** (ArgumentError) argument error
    (stdlib) :ets.lookup(Hound.SessionServer, #PID<0.592.0>)
    (hound) lib/hound/session_server.ex:19: Hound.SessionServer.current_session_id/1
    (hound) lib/hound/session_server.ex:13: Hound.SessionServer.session_for_pid/2
    lib/example.ex:7: Example.run/0
localhost:example alex$ mix test
Compiling 1 file (.ex)

== Compilation error in file lib/example.ex ==
** (ArgumentError) argument error
    (stdlib) :ets.lookup(Hound.SessionServer, #PID<0.160.0>)
    (hound) lib/hound/session_server.ex:19: Hound.SessionServer.current_session_id/1
    (hound) lib/hound/session_server.ex:13: Hound.SessionServer.session_for_pid/2
    lib/example.ex:7: Example.run/0

我是否在某处忘记了某个步骤或配置不正确？非常感谢任何帮助，谢谢！

4

1 回答 1

1

我清空lib/example.ex并将以下代码放在那里：

 defmodule Example do
   ...
 end

 Example.run

.ex文件和文件是有区别的.exs。您决定将该代码放在应用程序的主.ex文件中。摆脱这一行：

Example.run

然后，要执行Example.run()你这样做：

.../example$ iex -S mix

iex(1)> Example.run
"Akash Manohar // @HashNuke"
:ok

或者，您可以将扩展名更改为.exs，然后使用以下命令运行代码：

.../example$ mix run lib/example.exs

另一方面，如果要mix test运行测试，则必须将测试放在测试目录中。例如：

defmodule ExampleTest do
  use ExUnit.Case

  use Hound.Helpers

  test "page title is correct" do
    Hound.start_session

    navigate_to "http://akash.im"
    #IO.inspect page_title()
    assert page_title() == "Akash Manohar // @HashNuke"  

    Hound.end_session 
  end


end

在此处的 hound exunit 示例中，该hound_session()调用对我造成了错误：

15:06:33.736 [错误] GenServer Hound.SessionServer 终止 ** (RuntimeError) 无法创建新会话：超时，检查 webdriver 正在运行 (hound) lib/hound/session_server.ex:101: Hound.SessionServer.create_session/ 2

于 2019-07-03T20:07:20.647 回答