ran npm run tdd & generated TDD

test/fibonacciUntilNum/fibonacciUntilNum.js

@@ -0,0 +1,7 @@
+module.exports = num => {
+let n = Math.ceil(Math.log(num * Math.sqrt(5) + 1 / 2) / Math.log((Math.sqrt(5) + 1) / 2));
+return Array.from({ length: n }).reduce(
+(acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
+[]
+);
+};