Test migration to jest by hand

Apparently using regular expressions is way easier.

test/truncateString/truncateString.js

@@ -0,0 +1,3 @@
+const truncateString = (str, num) =>
+str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;
+module.exports = truncateString;

test/truncateString/truncateString.test.js

@@ -0,0 +1,9 @@
+const expect = require('expect');
+const truncateString = require('./truncateString.js');
+
+
+  test('truncateString is a Function', () => {
+  expect(truncateString).toBeInstanceOf(Function);
+});
+  t.equal(truncateString('boomerang', 7), 'boom...', 'Truncates a "boomerang" up to a specified length.');
+