ran npm run tdd & generated TDD

test/orderBy/orderBy.js

@@ -0,0 +1,10 @@
+module.exports = (arr, props, orders) =>
+[...arr].sort((a, b) =>
+props.reduce((acc, prop, i) => {
+if (acc === 0) {
+const [p1, p2] = orders && orders[i] === 'desc' ? [b[prop], a[prop]] : [a[prop], b[prop]];
+acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
+}
+return acc;
+}, 0)
+);