added test for slugify w/ burnettk

src/helpers.js

@@ -5,7 +5,8 @@ export const slugifyString = (str) => {
     .trim()
     .replace(/[^\w\s-]/g, '')
     .replace(/[\s_-]+/g, '-')
-    .replace(/^-+|-+$/g, '');
+    .replace(/^-+/g, '')
+    .replace(/-+$/g, '');
 };
 
 export const convertDateToSeconds = (date, onChangeFunction) => {

src/helpers.test.js

@@ -0,0 +1,5 @@
+import { slugifyString } from './helpers';
+
+test('it can slugify a string', () => {
+  expect(slugifyString("hello-world_ and then Some such-")).toEqual('hello-world-and-then-some-such');
+});