Updated the test system

test/collectInto.test.js

@@ -0,0 +1,18 @@
+const expect = require('expect');
+const {collectInto} = require('./_30s.js');
+
+test('collectInto is a Function', () => {
+  expect(collectInto).toBeInstanceOf(Function);
+});
+const Pall = collectInto(Promise.all.bind(Promise));
+let p1 = Promise.resolve(1);
+let p2 = Promise.resolve(2);
+let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3));
+test('Works with multiple promises', () => {
+  Pall(p1, p2, p3).then(
+    function(val) {
+      expect(val).toBe([1, 2, 3]);
+    },
+    function(reason) {}
+  );
+});