Feat: code refactoring and jest tests

chore: More refactoring

chore: More tests and refactors

fix: Fixed age not getting calculated properly

chore: Implemented mocking in jest

chore: More mock tests

chore: checkStuckScreen tests

lib/notifier/test/sms.test.js

@@ -0,0 +1,22 @@
+const sms = require('../sms')
+
+const alertRec = {
+  devices: {
+    f02af604ca9010bd9ae04c427a24da90130da10d355f0a9b235886a89008fc05: {
+      balanceAlerts: [],
+      deviceAlerts: [
+        { code: 'PING', age: 602784301.446, machineName: 'Abc123' }
+      ]
+    }
+  },
+  deviceNames: {
+    f02af604ca9010bd9ae04c427a24da90130da10d355f0a9b235886a89008fc05: 'Abc123'
+  },
+  general: []
+}
+
+test('Print SMS alerts', () => {
+  expect(sms.printSmsAlerts(alertRec, { active: true, errors: true })).toBe(
+    '[Lamassu] Errors reported: Machine Down (Abc123)'
+  )
+})