Add test for getCreationDate

tests/getCreationDate.test.js

@@ -0,0 +1,22 @@
+const getCreationDate = require('../util/getCreationDate');
+
+const users = [
+    { user: { createdAt: new Date("2016-01-29T14:47:58.915Z") } },
+    { user: { createdAt: new Date("2018-08-20T15:51:47.090Z") } },
+    { user: { createdAt: new Date("2019-04-08T21:08:11.212Z") } }
+
+]
+
+const humanReadableTime = [
+    "2016-01-29 14:47:58",
+    "2018-08-20 15:51:47",
+    "2019-04-08 21:08:11"
+]
+
+
+test('Testing getCreationDate', () => {
+    for(let i = 0; i < users.length; i++){
+        expect(getCreationDate(users[i])).toBe(humanReadableTime[i])
+    }
+    
+});