Add script to update list of failing generated fourslash tests

[gabritto]

Now you can do npm run updatefailing and the script will delete the current list of failing generated fourslash tests, re-generate the tests again (so that none is skipped), run the tests, and write the new list of failing tests.

[Copilot]

Pull Request Overview

Adds a convenience script to keep the autogenerated fourslash test failures up to date by regenerating tests, running them, and writing out the new failure list.

• Defines an updatefailing npm task that clears the old list, regenerates all tests, runs them, and writes the new failures.
• Introduces updateFailing.mts to orchestrate test regeneration and failure capture.
• Updates convertFourslash.mts to accept a set of failing tests and apply skips when generating Go tests.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
package.json	Adds updatefailing script alongside existing convertfourslash
internal/fourslash/_scripts/updateFailing.mts	New script to clear, rerun, and record failing tests
internal/fourslash/_scripts/tsconfig.json	Enables importing TypeScript extensions in scripts
internal/fourslash/_scripts/failingTests.txt	Removes out-of-date entries to be regenerated
internal/fourslash/_scripts/convertFourslash.mts	Refactors to read updated failures and skip tests accordingly

Comments suppressed due to low confidence (2)

internal/fourslash/_scripts/updateFailing.mts:7

• import.meta.dirname is not defined in ES modules; derive the directory with something like:

const __filename = url.fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const failingTestsPath = path.join(__dirname, "failingTests.txt");

const failingTestsPath = path.join(import.meta.dirname, "failingTests.txt");

internal/fourslash/_scripts/convertFourslash.mts:12

• import.meta.dirname isn’t supported in ESM; use the imported url module to compute __dirname, for example:

const __filename = url.fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const failingTestsPath = path.join(__dirname, "failingTests.txt");

const failingTestsPath = path.join(import.meta.dirname, "failingTests.txt");

[gabritto]

@Andarist would this help with the process of fixing generated fourslash tests or do you need something else?

[Andarist]

This is great 👍 it's a similar flow I've used manually myself