Test migration to jest by hand

Apparently using regular expressions is way easier.

test/zip/zip.js

@@ -0,0 +1,7 @@
+const zip = (...arrays) => {
+const maxLength = Math.max(...arrays.map(x => x.length));
+return Array.from({ length: maxLength }).map((_, i) => {
+return Array.from({ length: arrays.length }, (_, k) => arrays[k][i]);
+
+};
+module.exports = zip;

test/zip/zip.test.js

@@ -0,0 +1,22 @@
+const expect = require('expect');
+const zip = require('./zip.js');
+
+
+  test('zip is a Function', () => {
+  expect(zip).toBeInstanceOf(Function);
+});
+  t.deepEqual(zip(['a', 'b'], [1, 2], [true, false]), [['a', 1, true], ['b', 2, false]], 'zip([a, b], [1, 2], [true, false]) returns [[a, 1, true], [b, 2, false]]');
+  t.deepEqual(zip(['a'], [1, 2], [true, false]), [['a', 1, true], [undefined, 2, false]], 'zip([a], [1, 2], [true, false]) returns [[a, 1, true], [undefined, 2, false]]');
+  t.deepEqual(zip(), [], 'zip([]) returns []');
+  t.deepEqual(zip(123), [], 'zip(123) returns []');
+  test('zip([a, b], [1, 2], [true, false]) returns an Array', () => {
+  expect(Array.isArray(zip(['a', 'b'], [1, 2], [true, false]))).toBeTruthy();
+});
+  test('zip([a], [1, 2], [true, false]) returns an Array', () => {
+  expect(Array.isArray(zip(['a'], [1, 2], [true, false]))).toBeTruthy();
+});
+  t.throws(() => zip(null), 'zip(null) throws an error');
+  t.throws(() => zip(undefined), 'zip(undefined) throws an error');
+
+  
+