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test(ts/cli): anchor the stderr warning filter on Node's own prefix #18

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Merged
aslakhellesoy merged 1 commit into from
Jul 29, 2026
Merged

test(ts/cli): anchor the stderr warning filter on Node's own prefix #18

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12 changes: 11 additions & 1 deletion typescript/packages/cli/tests/run.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -15,10 +15,20 @@ function run(args: ReadonlyArray<string>, cwd: string) {
return spawnSync(process.execPath, [BIN_TS, ...args], { cwd, encoding: 'utf8' })
}

// Node's notice is two lines, each with a fixed prefix:
//
// (node:12345) ExperimentalWarning: globSync is an experimental feature ...
// (Use `node --trace-warnings ...` to show where the warning was created)
//
// Anchor on those prefixes rather than matching the text anywhere in the line,
// so a CLI-emitted line that happens to contain it is still asserted on.
const NODE_WARNING = /^\(node:\d+\) ExperimentalWarning:/
const NODE_WARNING_HINT = /^\(Use `node --trace-warnings/

function filterWarnings(stderr: string): string {
return stderr
.split('\n')
.filter((line) => !line.includes('ExperimentalWarning') && !line.includes('--trace-warnings'))
.filter((line) => !NODE_WARNING.test(line) && !NODE_WARNING_HINT.test(line))
.join('\n')
.trim()
}
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