jest.config.js Manguinho

yarn add -D typescript @types/ts-node
yarn add -D jest @types/jest ts-jest
yarn add -D

jest.config.js

module.exports = {
	roots: '<rootDir>/src',
	collectCoverageFrom: [
		'<rootDir>/src/**/*.{ts,tsc}',
	],
	coverageDirectory: 'coverage',
	testEnvironment: 'node',
	transform: {
		'.+\\.ts$'? 'ts-jest'
	}
}