Test migration to jest by hand

Apparently using regular expressions is way easier.

test/none/none.js

@@ -0,0 +1,2 @@
+const none = (arr, fn = Boolean) => !arr.some(fn);
+module.exports = none;

test/none/none.test.js

@@ -0,0 +1,21 @@
+const expect = require('expect');
+const none = require('./none.js');
+
+
+  test('none is a Function', () => {
+  expect(none).toBeInstanceOf(Function);
+});
+  test('Returns true for arrays with no truthy values', () => {
+  expect(none([0,undefined,NaN,null,''])).toBeTruthy();
+});
+  test('Returns false for arrays with at least one truthy value', () => {
+  expect(none([0,1])).toBeFalsy();
+});
+  test('Returns true with a predicate function', () => {
+  expect(none([4,1,0,3], x => x < 0)).toBeTruthy();
+});
+  test('Returns false with predicate function', () => {
+  expect(none([0,1,2], x => x === 1)).toBeFalsy();
+});
+  
+