model tests

frontend/lib/src/model/appointment.dart

@@ -52,12 +52,18 @@ class Appointment {
     return "$year-$month-$day";
   }
 
-  bool equals(Appointment app){
-    return toString() == app.toString();
+  bool equals(Appointment app) {
+    return id == app.id &&
+        year == app.year &&
+        month == app.month &&
+        day == app.day &&
+        name == app.name &&
+        time == app.time &&
+        duration == app.duration &&
+        location == app.location;
   }
 
-  String toString(){
+  String toString() {
     return "ID: $id Name: $name Date: $date Time: $time Duration: $duration Location: $location Note: $note";
   }
 }
-

frontend/lib/src/view/services/appointment_service.dart

@@ -2,7 +2,7 @@
 
 import 'dart:async';
 import 'dart:convert';
-
+import 'dart:html';
 
 import 'package:demo/src/view/main_component.dart';
 import 'package:http/http.dart';

frontend/pubspec.yaml

@@ -18,3 +18,4 @@ dependencies:
   build_web_compilers: ^1.0.0
   pedantic: ^1.0.0
   analyzer: ^0.34.3
+  test: ^1.5.0
\ No newline at end of file