Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test4/JSONToFile/JSONToFile.js

@@ -0,0 +1,4 @@
+const fs = require('fs');
+const JSONToFile = (obj, filename) =>
+fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2));
+module.exports = JSONToFile;

test4/JSONToFile/JSONToFile.test.js

@@ -0,0 +1,8 @@
+const expect = require('expect');
+const JSONToFile = require('./JSONToFile.js');
+
+test('Testing JSONToFile', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof JSONToFile === 'function').toBeTruthy();
+});