VS Code / Python / Debugger pytest with the Debugger

Question

在使用pytest运行测试时，如何让VS Code在失败点将我放入调试器？

Pytest捕获所有错误和断言，而VS代码仅在未捕获的错误时调用调试器(我可以将其更改为引发异常，但随后它会在try引发的所有错误上停止)。

我尝试将--pdb设置为pytest参数，但这会导致错误：

============================= test session starts =============================
platform win32 -- Python 3.8.1, pytest-5.3.2, py-1.8.1, pluggy-0.13.1
rootdir: c:\Projects\debugtest, inifile: pytest.ini
collected 1 item

test.py F
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> traceback >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Traceback (most recent call last):
  File "C:\Projects\debugtest\test.py", line 4, in test_with_assert
    assert 42==2.71828
AssertionError: assert 42 == 2.71828
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> entering PDB >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>>>>>>>>>>>>>>>>>> PDB post_mortem (IO-capturing turned off) >>>>>>>>>>>>>>>>>>
> c:\projects\debugtest\test.py(4)test_with_assert()
-> assert 42==2.71828
(Pdb)

PYDEV DEBUGGER WARNING:
sys.settrace() should not be used when the debugger is being used.
This may cause the debugger to stop working correctly.
If this is needed, please check: 
http://pydev.blogspot.com/2007/06/why-cant-pydev-debugger-work-with.html
to see how to restore the debug tracing back correctly.
Call Location:
  File "C:\Program Files\Python38\lib\bdb.py", line 359, in set_quit
    sys.settrace(None)


- generated xml file: C:\Users\tzhgfma1\AppData\Local\Temp\tmp-24044mEWMyB1nPYAu.xml -
!!!!!!!!!!!!!!!!!! _pytest.outcomes.Exit: Quitting debugger !!!!!!!!!!!!!!!!!!!
============================== 1 failed in 0.43s ==============================

我有一个非常简单的项目来测试这个：

.vscode\settings.json

{
    "python.testing.pytestArgs": [
        "--pdb"
    ],
    "python.testing.unittestEnabled": false,
    "python.testing.nosetestsEnabled": false,
    "python.testing.pytestEnabled": true,
    "git.ignoreLimitWarning": false
}

.vscode\launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        
        
        {
            "name": "Python: Current File",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "internalConsole",
            "justMyCode":false
        },
        {
            "name": "Python: Attach using Process Id",
            "type": "python",
            "request": "attach",
            "processId": "${command:pickProcess}",
            "justMyCode": false
        },
        {
            "name": "Debug Tests",
            "type": "python",
            "request": "test",
            "console": "internalConsole",
            "justMyCode": false
        }
    ]
}

pytest.ini

[pytest]

python_files = test*.py
python_classes = Test
python_functions = test
addopts = --tb=native
console_output_style = classic
junit_duration_report = call
filterwarnings =
    ignore::RuntimeWarning

和test.py：

def test_with_assert():
    assert 42==2.71828

--pdb是做这件事的正确方法吗？或者如何在出现断言或错误时进入调试器？

Answer 1

如果您想在VSCode中运行pytest时进入调试，停留在一行代码上，可以在选择pytest后点击方法顶部的'Debug Test‘，如截图所示：

​

​

此外，.vscode\settings.json中的"python.testing.pytestArgs": [],是测试文件的文件夹路径，例如，我的测试文件在Test_cc中的a文件夹下。

>      "python.testing.pytestArgs": [
>             "a/Test_cc"
>         ],

如果这不是你想要的，请让我知道并描述你的需求的细节。

参考：Debug tests。

更新：

通常，当我们在VSCode中调试测试时，没有为它设置断点，它只会显示测试结果。(成功或失败)。它只会在控制台输出中显示相关的测试信息。

当我使用扩展'Python Test Explorer for Visual Studio code‘时，它会在控制台上显示调试测试信息，提示问题。

​

​

Answer 2

这个Answer实际上解决了这个问题。我希望有一种更直接的方法，要么来自Visual Studio代码，要么来自pytest的一个简单的raise标志。