在 CircleCI 上運行 pytest-qt

Question

我正在嘗試在pytest-qt上運行需要pytest-qt （用於測試 PySide2 對話框）的測試。 我收到以下錯誤：

xdpyinfo was not found, X start can not be checked! Please install xdpyinfo!
============================= test session starts ==============================
platform linux -- Python 3.6.8, pytest-5.0.0, py-1.8.0, pluggy-0.12.0 -- /home/circleci/project-caveman/venv/bin/python3
cachedir: .pytest_cache
PySide2 5.13.0 -- Qt runtime 5.13.0 -- Qt compiled 5.13.0
rootdir: /home/circleci/project-caveman
plugins: cov-2.7.1, xvfb-1.2.0, qt-3.2.2
collected 1 item                                                               

tests/test_main.py::test_label_change_on_button_press Fatal Python error: Aborted

Aborted (core dumped)
Exited with code 134

我正在使用這個配置文件：

version: 2
jobs:
  build:
    working_directory: ~/project-caveman
    docker:
      - image: circleci/python:3.6.8-stretch
    steps:
      - checkout

      # Dependencies
      - restore_cache:
          keys:
            - venv-{{ .Branch }}-{{ checksum "setup.py" }}
            - venv-{{ .Branch }}-
            - venv-
      - run:
          name: Install dependencies
          command: |
            python3 -m venv venv
            . venv/bin/activate
            pip install -e .[test] --progress-bar off
      - save_cache:
          key: venv-{{ .Branch }}-{{ checksum "setup.py" }}
          paths:
            - "venv"

      # Tests
      - run:
          name: Pytest
          command: |
            mkdir test-reports
            . venv/bin/activate
            xvfb-run -a pytest -s -v --doctest-modules --junitxml test-reports/junit.xml --cov=coveralls --cov-report term-missing
      - store_test_results:
          path: test-reports
      - run:
          name: Coveralls
          command: coveralls

非常感謝任何幫助，提前致謝。

Answer 1

我在本地拉了容器circleci/python:3.6.8-stretch ，克隆了你的存儲庫並嘗試執行測試，而我可以重現錯誤。

首先要做的是為 Qt 運行時啟用調試模式，以便它打印一些有關錯誤的信息。 這可以通過設置環境變量QT_DEBUG_PLUGINS來完成：

$ QT_DEBUG_PLUGINS=1 pytest -sv

現在可以立即清楚容器中缺少什么來運行測試。 來自上述命令輸出的片段：

Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/bin/platforms" ...
Cannot load library /home/circleci/.local/lib/python3.6/site-packages/PySide2/Qt/plugins/platforms/libqxcb.so: (libxkbcommon-x11.so.0: cannot open shared object file: No such file or directory)
QLibraryPrivate::loadPlugin failed on "/home/circleci/.local/lib/python3.6/site-packages/PySide2/Qt/plugins/platforms/libqxcb.so" : "Cannot load library /home/circleci/.local/lib/python3.6/site-packages/PySide2/Qt/plugins/platforms/libqxcb.so: (libxkbcommon-x11.so.0: cannot open shared object file: No such file or directory)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

Aborted (core dumped)

解決這個問題很容易 - 安裝libxkbcommon-x11-0包：

$ sudo apt update && sudo apt install -y libxkbcommon-x11-0

在 CircleCI 配置中添加這一行（在測試作業之前的某處，例如在安裝包依賴項的作業中），測試應該可以正常運行。

除此之外，全局設置QT_DEBUG_PLUGINS=1是有意義的，這樣您就可以在將來對最終的 Qt 運行時故障做出反應。

找不到xdpyinfo，無法檢查X啟動！ 請安裝xdpyinfo！

如果您想擺脫該警告，請安裝x11-utils ：

$ sudo apt install x11-utils

Answer 2

Centos6.5只運行：yum install xdpyinfo，成功解決