Test migration to jest by hand

Apparently using regular expressions is way easier.

test/remove/remove.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const remove = require('./remove.js');
+
+
+  test('remove is a Function', () => {
+  expect(remove).toBeInstanceOf(Function);
+});
+  t.deepEqual(remove([1, 2, 3, 4], n => n % 2 === 0), [2, 4], "Removes elements from an array for which the given function returns false");
+  
+