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[heft] Integrate with VSCode extension for Jest

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Descrição

Summary

This issue relates to the conversation in the Rush stack Zulip forum: #heft > Jest extension in VSCode

When using the heft-jest-plugin, the Jest extension to VSCode cannot start, and thus Testing panel and Test Results window are inoperable.

Running tests via the command-line works as expected -- the actual Jest tests are executed and reported as expected.

Details

Navigate to the Testing pane, and run tests. The TestResults window shows an error:

Jest encountered an unexpected token

Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

This is expected. The heft-jest-plugin documentation discusses the differences from ts-jest. The key point is that Jest expects to transform Typescript itself from the src folder, while heft-jest-plugin runs tests from transformed code, typically in the lib folder.

While expected, it is not the desired result.

The extension allows for changing the start command. I tried using the command npm run test (and the package.json entry is

"scripts": {
  "build": "heft build --clean",
  "test":"heft test-watch"
},

However, the Test results window now shows:

heft test-watch C:\Users\PAULSC~1\AppData\Local\Temp\jest_runner_heft_appconfig_plugin_paulschaeflein.json default c:\Users\PaulSchaeflein.vscode\extensions\orta.vscode-jest-6.4.4\out\reporter.js

usage: heft test-watch [-h] [-v] [--production] [--locales LOCALE] [--clean]
[--config RELATIVE_PATH] [--debug-heft-reporter]
[--detect-open-handles] [--disable-code-coverage]
[--find-related-tests SOURCE_FILE] [--log-heap-usage]
[--max-workers COUNT_OR_PERCENTAGE] [--silent]
[-t REGEXP] [--test-path-ignore-patterns REGEXP]
[--test-path-pattern REGEXP]
[--test-timeout-ms TIMEOUT] [-u] [--fix] [--serve]

heft test-watch: error: Unrecognized arguments: C:\Users\PAULSC~1\AppData\Local\Temp\jest_runner_heft_appconfig_plugin_paulschaeflein.json default c:\Users\PaulSchaeflein.vscode\extensions\orta.vscode-jest-6.4.4\out\reporter.js.

{
  "error": {
    "code": 1,
    "summary": "",
    "detail": ""
  }
}

The extension's start command is expected to receive a specific set of parameters that are passed to the Jest command. Those parameters are as follows:

--testLocationInResults --json --useStderr --outputFile "C:\\Users\\PAULSC~1\\AppData\\Local\\Temp\\jest_runner_heft_appconfig_plugin_paulschaeflein_2.json --no-coverage --reporters "default" --reporters "c:\\Users\\PaulSchaeflein\\.vscode\\extensions\\orta.vscode-jest-6.4.4\\out\\reporter.js --colors --watchAll=false

In the Zulip thread, @octogonz added the following (and requested this issue):

The main work item is just to expose those CLI parameters as equivalent Heft parameters, and then provide a small heft-jest script that discards irrelevant parameters and remaps any slightly renamed parameters, when invoking Heft.

The important parameters are: --testLocationInResults, --json, --useStderr, --outputFile, --no-coverage, --reporters

But we would probably consolidate them, something like:

  • Heft --testResultsFile (equilalent to Jest --json + --useStderr + --outputFile)
  • --testLocationInResults
  • --no-coverage
  • Heft --testReporter (equivalent to Jest --reporters, but without delusions of removing HeftJestReporter)

Standard questions

Please answer these questions to help us investigate your issue more quickly:

Question Answer
@rushstack/heft version? 1.1.6
Operating system? Windows
Would you consider contributing a PR? No (I am not talented enough to do that.)
Node.js version (node -v)? 22.16.0
Linguagem predominante
TypeScript
Estrelas
6.5k
Forks
708
Merge médio
2d 1h
PRs com merge (30d)
46

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