@putout/operator-type-checker

🐊Putout operator adds ability to create type-checker.

Install

npm i putout @putout/operator-type-checker

API

When you need to filter out all CallExpression nodes without MemberExpression inside, like: fn('hello'), but not fn(a.b), use:

const {operator} = require('putout');
const {createTypeChecker} = operator;

const check = createTypeChecker([
    '-: -> !MemberExpression',
    '+: parentPath -> CallExpression',
]);

Coverage

The strong side of Type Checker is coverage reports:

🌴 Checkers Covered

To check coverage set PUTOUT_INSTRUMENT=1 when running tests.

When you need to setup tests coverage check on ending of tests just use:

import {callWhenTestsEnds} from 'supertape';
import {whenTestsEnds} from '@putout/printer/type-checker/when-tests-ends';

callWhenTestsEnds('PUTOUT_INSTRUMENT', whenTestsEnds);

It is already handled in @putout/test, so if you use it - you covered 😏.

License

MIT