Updated the test system

test/spreadOver.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const {spreadOver} = require('./_30s.js');
+
+test('spreadOver is a Function', () => {
+  expect(spreadOver).toBeInstanceOf(Function);
+});
+const arrayMax = spreadOver(Math.max);
+test('Takes a variadic function and returns a closure that accepts an array of arguments to map to the inputs of the function.', () => {
+  expect(arrayMax([1, 2, 3])).toBe(3);
+});