v8-to-istanbul

!nycrc config on GitHub

converts from v8 coverage format to istanbul's coverage format.

Usage

``js
const v8toIstanbul = require('v8-to-istanbul')
// the path to the original source-file is required, as its contents are
// used during the conversion algorithm.
const converter = v8toIstanbul('./path-to-instrumented-file.js')
await converter.load() // this is required due to async file reading.
// provide an array of coverage information in v8 format.
converter.applyCoverage([
{
"functionName": "",
"ranges": [
{
"startOffset": 0,
"endOffset": 520,
"count": 1
}
],
"isBlockCoverage": true
},
// ...
])
// output coverage information in a form that can
// be consumed by Istanbul.
console.info(JSON.stringify(converter.toIstanbul()))
`

Ignoring Uncovered Lines

Sometimes you might find yourself wanting to ignore uncovered lines
in your application (for example, perhaps you run your tests in Linux, but
there's code that only executes on Windows).

To ignore lines, use the special comment / v8 ignore next /.

NOTE: Before version 9.2.0 the ignore hint had to contain c8 keyword, e.g. /* c8 ignore ....

$3

`js
const myVariable = 99
/ v8 ignore next /
if (process.platform === 'win32') console.info('hello world')
`

$3

`js
const myVariable = 99
/ v8 ignore next 3 /
if (process.platform === 'win32') {
console.info('hello world')
}
`

$3

`js
/ v8 ignore start /
function dontMindMe() {
// ...
}
/ v8 ignore stop /
`

$3

`js
const myVariable = 99
const os = process.platform === 'darwin' ? 'OSXy' / v8 ignore next / : 'Windowsy'
`

Testing

To execute tests, simply run:

`bash
npm test
``