Updated the test system

test/take.test.js

@@ -0,0 +1,12 @@
+const expect = require('expect');
+const {take} = require('./_30s.js');
+
+test('take is a Function', () => {
+  expect(take).toBeInstanceOf(Function);
+});
+test('Returns an array with n elements removed from the beginning.', () => {
+  expect(take([1, 2, 3], 5)).toEqual([1, 2, 3]);
+});
+test('Returns an array with n elements removed from the beginning.', () => {
+  expect(take([1, 2, 3], 0)).toEqual([]);
+});