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Test

Notre essayons de garder une couverture de code élevée pour Electron. Nous demandons à ce que toutes les demandes de "pull" passent tout les tests existants, mais ajoutent aussi des tests couvrant les changements de codes et les nouveaux scénarios. Cela nous assure ainsi que nous intégrons le plus de code possible tout en étant sûr que Electron soit livré avec le moins de bugs possible.

Ce dépôt utilise des règles de qualité de code pour JavaScript et C++ ainsi que des tests unitaires et d'intégrations. Pour en apprendre plus sur le style de code d'Electron, référez-vous au document style de code.

Linting

To ensure that your JavaScript is in compliance with the Electron coding style, run npm run lint-js, which will run standard against both Electron itself as well as the unit tests. If you are using an editor with a plugin/addon system, you might want to use one of the many StandardJS addons to be informed of coding style violations before you ever commit them.

To run standard with parameters, run npm run lint-js -- followed by arguments you want passed to standard.

To ensure that your C++ is in compliance with the Electron coding style, run npm run lint-cpp, which runs a cpplint script. We recommend that you use clang-format and prepared a short tutorial.

There is not a lot of Python in this repository, but it too is governed by coding style rules. npm run lint-py will check all Python, using pylint to do so.

Tests unitaires

If you are not using build-tools, ensure that that name you have configured for your local build of Electron is one of Testing, Release, Default, Debug, or you have set process.env.ELECTRON_OUT_DIR. Without these set, Electron will fail to perform some pre-testing steps.

To run all unit tests, run npm run test. The unit tests are an Electron app (surprise!) that can be found in the spec folder. Note that it has its own package.json and that its dependencies are therefore not defined in the top-level package.json.

To run only specific tests matching a pattern, run npm run test -- -g=PATTERN, replacing the PATTERN with a regex that matches the tests you would like to run. As an example: If you want to run only IPC tests, you would run npm run test -- -g ipc.

Testing on Windows 10 devices

Extra steps to run the unit test:

  1. Visual Studio 2019 must be installed.

  2. Node headers have to be compiled for your configuration.

    ninja -C out\Testing third_party\electron_node:headers
  3. The electron.lib has to be copied as node.lib.

    cd out\Testing
    mkdir gen\node_headers\Release
    copy electron.lib gen\node_headers\Release\node.lib

Missing fonts

Some Windows 10 devices do not ship with the Meiryo font installed, which may cause a font fallback test to fail. To install Meiryo:

  1. Push the Windows key and search for Manage optional features.
  2. Cliquez sur Ajouter une fonctionnalité.
  3. Select Japanese Supplemental Fonts and click Install.

Pixel measurements

Some tests which rely on precise pixel measurements may not work correctly on devices with Hi-DPI screen settings due to floating point precision errors. To run these tests correctly, make sure the device is set to 100% scaling.

To configure display scaling:

  1. Push the Windows key and search for Display settings.
  2. Under Scale and layout, make sure that the device is set to 100%.