Example of Jest config with support for Path Mapping

jest.config.js

const { pathsToModuleNameMapper } = require('ts-jest/utils');
// In the following statement, replace `./tsconfig` with the path to your `tsconfig` file
// which contains the path mapping (ie the `compilerOptions.paths` option):
const { compilerOptions } = require('./tsconfig');

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  testMatch: ['**/tst/**/*.test.ts'],
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>/' }),
};

tsconfig.json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false,
    "declaration": true,
    "baseUrl": ".",
    "outDir": "build",
    "typeRoots": ["node_modules/@types"],
    "resolveJsonModule": true,
    "paths": {
        "@src/*": ["./src/*"],
        "@tst/*": ["./tst/*"]
    }
  },
  "exclude": [
    "node_modules",
    "jest.config.js"
  ],
  "include": [
    "src/**/*",
    "tst/*.ts",
    "tst/**/*.test.ts"
  ]
}