jest-it-up


Ensure incremental coverage gains are not lost, and positively reinforce good testing habits. Automatically bump up global Jest thresholds whenever coverage goes above them.

!Demo

Requirements

- Node.js 20+
- Conventional jest.config.js (package.json config unsupported)
- json-summary coverage report (see usage)

Installation

``console
npm install --save-dev jest-it-up
`

Usage

jest-it-up exposes a standalone CLI tool (see options), but you most likely want to use it in a post-test script.

Within package.json:

`js
{
"scripts": {
"test": "jest --coverage", // or set collectCoverage to true in Jest config
"posttest": "jest-it-up" // must run from the same directory as jest.config.js
}
}
`

within jest.config.js:

`js
module.exports = {
coverageReporters: [
'json-summary', // plus any other reporters, e.g. "lcov", "text", "text-summary"
],
coverageThreshold: {
global: {
branches: 0, // or your current numbers
functions: 0,
lines: 0,
statements: 0,
},
},
}
`

Once tests finish running, jest-it-up will update configured thresholds to match higher coverage numbers, if any.

Options

`console
$ jest-it-up --help
Usage: jest-it-up [options]

Options:
-c, --config path to a Jest config file (default: 'jest.config.js')
-m, --margin minimum threshold increase (default: 0)
-t, --tolerance threshold difference from actual coverage
-i, --interactive ask for confirmation before applying changes
-s, --silent do not output messages
-d, --dry-run process but do not change files
-v, --version output the version number
-p, --precision number of threshold decimal places to persist
-h, --help display help for command
``