Jest + TS + Path Aliases

jest.config.ts

import { pathsToModuleNameMapper } from 'ts-jest'

import { compilerOptions } from './tsconfig.json'

import type { JestConfigWithTsJest } from 'ts-jest'

const config: JestConfigWithTsJest = {
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {
    prefix: '<rootDir>/',
  }),
  preset: 'ts-jest',
  resolver: 'jest-ts-webcompat-resolver',
}

export default config

package.json

{
  "scripts": {
    ...,
    "test": "jest",
  },
  "devDependencies": {
    ...,
    "@types/jest": "29.5.12",
    "jest": "29.7.0",
    "jest-ts-webcompat-resolver": "1.0.0",
    "ts-jest": "29.1.4",
    "ts-node": "10.9.2",
    "typescript": "5.4.5"
  }
}

tsconfig.json

{
  "compilerOptions": {

    "paths": {
      "~*": ["./*"],
      ...
    },
    "resolveJsonModule": true
  }
}