first step to install the package:

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

step 2: initialize project-related configuration files:
generate tsconfig.json:

tsc --init

create jest.config.js:

module.exports = {
  transform: {
    '^.+\\.tsx?$': 'ts-jest',
  },
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$',
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
}

directory structure:

base.spec.ts:

: