OrenIshShalom's questions

我可以选择性地运行test_function_1，覆盖我的conftest.py装置中的仪表¹

def test_function_1(instrumentation: dict[str, float]) -> None:
    assert instrumentation['a'] > instrumentation['b']

def test_function_2(capsys) -> None:
    print("Hello, pytest!")
    captured = capsys.readouterr()
    assert captured.out == "Hello, pytest!\n"

当我尝试调用时test_function_2，我不知道如何传递capsys给它²：

import tests
import pytest # <--- doesn't help ...

def test_callee_with_instrumentation():
    tests.test_function_1({'a': 110, 'b': 55, 'g': 6000})

def test_callee_with_capsys():
    # tests.test_function_2()              # <--- TypeError: test_function_2() missing 1 required positional argument: 'capsys'
    # tests.test_function_2(capsys)        # <--- NameError: name 'capsys' is not defined 
    # tests.test_function_2(pytest.capsys) # <--- AttributeError: module 'pytest' has no attribute 'capsys'
    pass

test_callee_with_instrumentation()
test_callee_with_capsys()

我很确定这些conftest.py装置是无关紧要的，但为了完整起见：

import pytest

@pytest.fixture(scope='function')
def instrumentation():
    return { 'a': 800, 'b': 620, 'c': 44 }

¹在我的实际代码中，是众多capsys参数之一。

²这里有类似的问题。在我看来，这不是重复的，因为我问的是编程运行测试，而不是的正确含义capsys。

我在我的树莓派上编译了一个 aarch64 elf 可执行文件：

$ file kbgen.elf.aarch64
kbgen.elf.aarch64: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=4cf36e84c30ea8e53073bb64cf99df1d82084702, with debug_info, not stripped

当我尝试在我的 x64 机器（wsl）上剥离它的符号时失败了：

$ strip kbgen.elf.aarch64
strip: Unable to recognise the format of the input file `kbgen.elf.aarch64'

这很奇怪，对吧？我的意思是精灵部分是“跨平台的”，不是吗？

# get inside raspberry pi to make sure stripping is ok there
$ ls -l kbgen.elf.aarch64
-rwxr-xr-x 1 oren oren 73257408 Oct 26 08:40 kbgen.elf.aarch64
$ sudo strip kbgen.elf.aarch64
$ ls -l kbgen.elf.aarch64 # <----- size reduced by a half, good !
-rwxr-xr-x 1 root root 36358680 Oct 26 08:42 kbgen.elf.aarch64

# make sure elf was stripped with file utility
$ file kbgen.elf.aarch64
kbgen.elf.aarch64: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=4cf36e84c30ea8e53073bb64cf99df1d82084702, stripped

我有一个 Haskellyesod网络服务器，它运行良好^1,2，并且日志记录良好³：

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes       #-}
{-# LANGUAGE TemplateHaskell   #-}
{-# LANGUAGE TypeFamilies      #-}
{-# LANGUAGE DeriveGeneric     #-}
{-# LANGUAGE DeriveAnyClass    #-}
{-# LANGUAGE OverloadedStrings #-}

import Yesod
import Prelude
import Data.Aeson()
import GHC.Generics
import Data.Text
import Data.Time
import Yesod.Core.Types
import System.Log.FastLogger
import Network.Wai.Handler.Warp

-- Wai stuff
import qualified Network.Wai
import qualified Network.Wai.Logger
import qualified Network.HTTP.Types.Status
import qualified Network.Wai.Middleware.RequestLogger as Wai

data Healthy = Healthy Bool deriving ( Generic )

-- | This is just for the health check ...
instance ToJSON Healthy where toJSON (Healthy status) = object [ "healthy" .= status ]

data App = App

mkYesod "App" [parseRoutes|
/healthcheck HealthcheckR GET
|]

instance Yesod App where
    makeLogger = \_app -> myLogger

getHealthcheckR :: Handler Value
getHealthcheckR = do
    $logInfoS "(HealthCheck)" "Good !"
    returnJson $ Healthy True

myLogger :: IO Logger
myLogger = do
    _loggerSet <- newStdoutLoggerSet defaultBufSize
    formatter <- newTimeCache "[%d/%m/%Y ( %H:%M:%S )]"
    return $ Logger _loggerSet formatter

dateFormatter :: String -> String
dateFormatter date = let
    date' = parseTimeOrError True defaultTimeLocale "%d/%b/%Y:%T %Z" date :: UTCTime
    in formatTime defaultTimeLocale "[%Y/%m/%d ( %H:%M:%S )]" date'

formatter :: Network.Wai.Logger.ZonedDate -> Network.Wai.Request -> Network.HTTP.Types.Status.Status -> Maybe Integer -> LogStr
formatter zonedDate req status responseSize = "[ 17/17/2017 ]\n"

main :: IO ()
main = do
    waiApp <- toWaiApp App
    middleware <- Wai.mkRequestLogger (Wai.defaultRequestLoggerSettings { Wai.outputFormat = Wai.CustomOutputFormat formatter })
    run 3000 $ middleware waiApp

当我检查日志时，我看到三条消息，其中两条是我的

[23/10/2024 ( 15:07:06 )] [Info#(HealthCheck)] Good ! @(main:Main src/Main.hs:41:6)
172.17.0.1 - - [23/Oct/2024:15:07:06 +0000] "GET /healthcheck HTTP/1.1" 200 16 "" "curl/8.9.1"
[ 17/17/2017 ]

消息从哪里来172.17.0.1 - - ...的？！看来它一定来自 Wai 层（对吧？）但话说回来，我以为我配置了 Wai 日志

^1,2完整的源代码在这里，根据评论进行了编辑以简化

³嗯，差不多了！

我正在尝试确定加载了哪些 python 系统模块：

In [1]: import sys
In [2]: l = sorted(list(sys.modules.keys()))
In [3]: 'json' in l
Out[3]: True

根据文档：

这是一个将模块名称映射到已加载模块的字典。

所以我认为也许是 sys进口的json，但结果却是错误的：

In [4]: json.dumps({'oren': 12})
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[4], line 1
----> 1 json.dumps({'oren': 12})

NameError: name 'json' is not defined

我错过了什么？

恕我直言，这不是这个问题的重复。这是一个最小的例子：

class Indexer {
  private readonly someIndex = 200;
  public getIndex() { return this.someIndex; }
}

class Person extends Indexer {}
class Something<T extends Indexer> {
  s = new Map<number, T>();
  insert(t: T){ /* ... */ }
}

const c1 = new Something<         Person >();
const c2 = new Something<Readonly<Person>>();

• 一方面我的类需要子类化Indexer
• 另一方面，它需要Readonly

我无法同时实现这两个属性：

$ npx tsc --target es2020 main.ts
main.ts:13:26 - error TS2344: Type 'Readonly<Person>' does not satisfy the constraint 'Indexer'.
  Property 'someIndex' is missing in type 'Readonly<Person>' but required in type 'Indexer'.

13 const c2 = new Something<Readonly<Person>>();
                            ~~~~~~~~~~~~~~~~

  main.ts:2:20
    2   private readonly someIndex = 200;
                         ~~~~~~~~~
    'someIndex' is declared here.