/
takeCoverage.ts
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/
takeCoverage.ts
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/*
* For details about the Profiler.* messages see https://chromedevtools.github.io/devtools-protocol/v8/Profiler/
*/
import inspector from 'node:inspector'
import type { Profiler } from 'node:inspector'
import { provider } from 'std-env'
const session = new inspector.Session()
export function startCoverage() {
session.connect()
session.post('Profiler.enable')
session.post('Profiler.startPreciseCoverage', {
callCount: true,
detailed: true,
})
}
export async function takeCoverage() {
return new Promise((resolve, reject) => {
session.post('Profiler.takePreciseCoverage', async (error, coverage) => {
if (error)
return reject(error)
// Reduce amount of data sent over rpc by doing some early result filtering
const result = coverage.result.filter(filterResult)
resolve({ result })
})
if (provider === 'stackblitz')
resolve({ result: [] })
})
}
export function stopCoverage() {
session.post('Profiler.stopPreciseCoverage')
session.post('Profiler.disable')
session.disconnect()
}
function filterResult(coverage: Profiler.ScriptCoverage): boolean {
if (!coverage.url.startsWith('file://'))
return false
if (coverage.url.includes('/node_modules/'))
return false
return true
}