ran npm run tdd

test/memoize/memoize.js

@@ -1,8 +1,9 @@
-module.exports = memoize = fn => {
+const memoize = fn => {
 const cache = new Map();
 const cached = function(val) {
 return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
 };
 cached.cache = cache;
 return cached;
-};
+};
+ module.exports = memoize