coverage-diff

What it does

- Accepts base-summary.json and head-summary.json
- Diffs the two jsons and outputs info about
- Percentage of changed coverage (in changed/added files)
- Formatted as markdown table
- Fail if coverage decreases on a file (check on percentage) for any of the lines/func/statements/branches. Can
 be configured to only check some criteria.
- Separate threshold for new files newFileCoverageThreshold, defaults to coverageThreshold if not passed
- Written in Typescript.

Usage

``js
import fs from 'fs';
import { diff as coverageDiff } from 'coverage-diff';

const base = JSON.parse(fs.readFileSync('./base-summary.json'));
const head = JSON.parse(fs.readFileSync('./head-summary.json'));
const diff = coverageDiff.diff(base, head);

console.log(diff.diff);
console.log(diff.results);
console.log(diff.regression);
``

Out:

| Ok | File | Lines | Branches | Functions | Statements |
| --- | ----- | ------------- | ------------- | ------------ | ------------- |
| 🔴 | file1 | 80%
(+10%) | 14%
(-30%) | 3%
(+20%) | 20%
(-10%) |
| ✅ | file2 | 20%
(+10%) | 8%
(-30%) | 2%
(-20%) | 5%
(-10%) |

API at https://flaviusone.github.io/coverage-diff/