Jest with 'npm test' fails with "Use of const in strict mode" - node.js

Question

I am just trying to use Jest as unit testing framework.
I done and example from official ReactJS side.
function sum(value1, value2) {
return value1 + value2;
}
module.exports = sum;
----------------------------------------------------------------
jest.dontMock('../sum');
describe('sum', function() {
it('adds 1 + 2 to equal 3', function() {
var sum = require('../sum');
expect(sum(1, 2)).toBe(3);
});
});
But when I run npm tests I got next error:
/home/app.local/node_modules/jest-cli/bin/jest.js:12
const fs = require('fs');
^^^^^
SyntaxError: Use of const in strict mode.
at Module._compile (module.js:439:25)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:902:3
npm ERR! Test failed. See above for more details.
npm WARN This failure might be due to the use of legacy binary "node"
npm WARN For further explanations, please read
/usr/share/doc/nodejs/README.Debian
What is going wrong ?

Answer 1

If you read the documentation of the link that you posted, you can see that it says the following:
Jest uses ES2015 features and requires a Node.js version of at least 4.0.0 to run.
You are on version 0.10.25 which is probably why you are having issues. Upgrading your version to >= 4.0.0 should fix this.