Jest react SyntaxError: Cannot use import statement outside a module - reactjs

Question

I'm trying to run a simple test taken from jest official site in jest but I'm getting this error:
I don't understand why he complains about an import statement since there are not in the test file:
sum.test.ts:
test('two plus two is four', () => {
expect(2 + 2).toBe(4);
});
export {};
Any suggestions?
Following more configurations files about jest and typescript in case are needed for a better view of my situation..
jest.config.js:
// recusrsively replaces the string from / to in the object structure.
function replacePackageJsonSpecific(structure, from, to) {
for (const property in structure) {
if (typeof structure[property] === 'object') {
replacePackageJsonSpecific(structure[property], from, to);
} else if (typeof structure[property] === 'string') {
if (structure[property].includes(from)) {
structure[property] = structure[property].replace(from, to);
}
}
}
}
// replaces properties from left to right, concatenates arrays from left and right
function merge(left, right) {
const merged = {...left, ...right};
for (const property in right) {
if (Array.isArray(right[property]) && Array.isArray(left[property])) {
merged[property] = left[property].concat(right[property]);
}
}
return merged;
}
const path = require('path');
let directory = path.join(process.cwd(), '/');
let reporters = ['default', 'jest-junit'];
process.argv.forEach(function (val) {
if (val.includes('cwd')) {
const cwd = val.split('=')[1];
directory = path.join(directory, cwd.substring(0, cwd.search('test')));
reporters = reporters.slice(0, 1);
}
});
const packageJson = require(directory + 'package.json');
replacePackageJsonSpecific(packageJson.jest, '<rootDir>', directory);
packageJson.jest.rootDir = directory;
const isCI = () => process.env['CI'] === 'true';
module.exports = merge(
{
cacheDirectory: './node_modules/.cache/jest-cache',
reporters: reporters,
roots: [path.join(directory, '/test/unit/')],
setupFilesAfterEnv: [directory + 'test/setupTests.ts'],
snapshotSerializers: ['enzyme-to-json/serializer'],
collectCoverage: process.env['COVERAGE_REPORT'] === 'true' || isCI(),
coverageDirectory: 'generated/coverage',
testEnvironment: 'enzyme',
testEnvironmentOptions: {
enzymeAdapter: 'react16',
},
testMatch: ['**/?(*.)(spec|test).(j|t)s?(x)'],
testURL: 'http://localhost',
preset: 'ts-jest',
transform: {
'^.+\\.(ts|tsx)?$': 'ts-jest',
'^.+\\.(js|jsx|mjs|ts|tsx)$': './node_modules/react-scripts/config/jest/babelTransform.js',
'^.+\\.(js|jsx|mjs)$': './node_modules/babel-jest',
'^.+\\.css$': './node_modules/react-scripts/config/jest/cssTransform.js',
'^(?!.*\\.(js|jsx|mjs|css|json)$)': './node_modules/react-scripts/config/jest/fileTransform.js',
},
transformIgnorePatterns: ['<rootDir>/node_modules/(?!#uwr/icons)'],
coverageReporters: ['html', 'lcov', 'text'],
globals: {
'ts-jest': {
tsConfigFile: 'tsconfig.test.json',
},
},
moduleDirectories: ['node_modules'],
moduleFileExtensions: ['mjs', 'web.ts', 'ts', 'web.tsx', 'tsx', 'web.js', 'js', 'web.jsx', 'jsx', 'json', 'node'],
},
packageJson.jest,
);
babel.config.js:
module.exports = {
presets: [
['#babel/preset-env', {targets: {node: 'current'}}],
'#babel/preset-typescript',
],
};
package.json:
"scripts": {
"test": "react-app-rewired test --no-watchman --watchAll=false",
}
folders structure: