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feat!: coverage-c8 to use V8 profiler directly instead of `NODE_V8_CO…
…VERAGE` `@vitest/coverage-c8` no more writes coverage/tmp directory. Both `vitest` and `@vitest/coverage-c8` must be updated to latest versions.
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,10 +1,46 @@ | ||
import v8 from 'v8' | ||
/* | ||
* For details about the Profiler.* messages see https://chromedevtools.github.io/devtools-protocol/v8/Profiler/ | ||
*/ | ||
|
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// Flush coverage to disk | ||
import inspector from 'node:inspector' | ||
import type { Profiler } from 'node:inspector' | ||
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export function takeCoverage() { | ||
if (v8.takeCoverage == null) | ||
console.warn('[Vitest] takeCoverage is not available in this NodeJs version.\nCoverage could be incomplete. Update to NodeJs 14.18.') | ||
else | ||
v8.takeCoverage() | ||
const session = new inspector.Session() | ||
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export function startCoverage() { | ||
session.connect() | ||
session.post('Profiler.enable') | ||
session.post('Profiler.startPreciseCoverage', { | ||
callCount: true, | ||
detailed: true, | ||
}) | ||
} | ||
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export async function takeCoverage() { | ||
return new Promise((resolve, reject) => { | ||
session.post('Profiler.takePreciseCoverage', async (error, coverage) => { | ||
if (error) | ||
return reject(error) | ||
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// Reduce amount of data sent over rpc by doing some early result filtering | ||
const result = coverage.result.filter(filterResult) | ||
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resolve({ result }) | ||
}) | ||
}) | ||
} | ||
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export function stopCoverage() { | ||
session.post('Profiler.stopPreciseCoverage') | ||
session.post('Profiler.disable') | ||
} | ||
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function filterResult(coverage: Profiler.ScriptCoverage): boolean { | ||
if (!coverage.url.startsWith('file://')) | ||
return false | ||
|
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if (coverage.url.includes('/node_modules/')) | ||
return false | ||
|
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return true | ||
} |
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