Tests: Start implementing tests

Only convertDateToISOString for now

tests/convertDateToISOString.test.js

@@ -0,0 +1,13 @@
+const convertDateToISOString = require('../util/convertDateToISOString');
+
+
+
+
+test('Converts to human readable date string', () => {
+    let dates = [new Date("1999-12-31 23:55:00"), new Date(0), new Date(5600000), new Date(1000200000000)]
+    let expectedDateStrings = ["1999-12-31 22:55:00", "1970-01-01 00:00:00", "1970-01-01 01:33:20", "2001-09-11 09:20:00"]
+    for (let i = 0; i < dates.length; i++) {
+        
+        expect(convertDateToISOString(dates[i])).toBe(expectedDateStrings[i]);
+    }
+});