Test migration to jest by hand

Apparently using regular expressions is way easier.

test/negate/negate.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const negate = require('./negate.js');
+
+
+  test('negate is a Function', () => {
+  expect(negate).toBeInstanceOf(Function);
+});
+  t.deepEqual([1, 2, 3, 4, 5, 6].filter(negate(n => n % 2 === 0)), [1, 3, 5], "Negates a predicate function");
+  
+