[英]Trying to read a webpage in Hound, I get a compilation error for Hound.start_session
我開始了一個新項目,並按如下方式進行配置:
mix new example
cd example
我清空“ lib / example.ex”並在其中放置以下代碼:
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
這是https://github.com/HashNuke/hound/blob/master/notes/simple-browser-automation.md提供的示例代碼
然后我通過brew install selenium-server-standalone
安裝了Selenium服務器(我在MacOS上),通過brew services start selenium-server-standalone
了它。 brew services start selenium-server-standalone
並向config/config.exs
添加了config :hound, driver: "selenium"
我添加了Application.ensure_all_started(:hound)
作為test/test_helper.exs
的第一行。
最后,我將{:hound, "~> 1.0"}
到mix.exs並運行mix test
。 那就是我收到以下編譯錯誤時:
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
我忘記某個地方的步驟或配置錯誤嗎? 任何幫助,萬分感謝,謝謝!
我清空了
lib/example.ex
並在其中放置了以下代碼:
defmodule Example do
...
end
Example.run
.ex
文件和.exs
文件之間有區別。 您決定將代碼放入應用程序的主.ex
文件中。 擺脫這一行:
Example.run
然后,要執行Example.run()
請執行以下操作:
.../example$ iex -S mix
iex(1)> Example.run
"Akash Manohar // @HashNuke"
:ok
或者,您可以將擴展名更改為.exs
,然后使用以下代碼運行代碼:
.../example$ mix run lib/example.exs
另一方面,如果要使用mix test
來運行測試,則必須將測試放在測試目錄中。 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
在此處的獵犬exunit示例中, hound_session()
調用對我造成了錯誤:
15:06:33.736 [錯誤]終止**(RuntimeError)的GenServer Hound.SessionServer無法創建新的會話:超時,檢查webdriver是否正在運行(獵犬)lib / hound / session_server.ex:101:Hound.SessionServer.create_session / 2
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