feat(priority): Adds the full range of priorities from A to Z #48

lib/domain/todo/todo_model.dart

@@ -3,7 +3,35 @@ import 'dart:math';
 import 'package:equatable/equatable.dart';
 import 'package:ntodotxt/exceptions/exceptions.dart';
 
-enum Priority { none, A, B, C, D, E, F }
+enum Priority {
+  none,
+  A,
+  B,
+  C,
+  D,
+  E,
+  F,
+  G,
+  H,
+  I,
+  J,
+  K,
+  L,
+  M,
+  N,
+  O,
+  P,
+  Q,
+  R,
+  S,
+  T,
+  U,
+  V,
+  W,
+  X,
+  Y,
+  Z
+}
 
 extension Priorities on Priority {
   static Set<Priority> get priorities => {
@@ -71,7 +99,7 @@ extension Priorities on Priority {
 class Todo extends Equatable {
   static final RegExp patternWord = RegExp(r'^\S+$');
   // Limit priorities from A-F.
-  static final RegExp patternPriority = RegExp(r'^\((?<priority>[A-F])\)$');
+  static final RegExp patternPriority = RegExp(r'^\((?<priority>[A-Z])\)$');
   static final RegExp patternDate = RegExp(r'^\d{4}-\d{2}-\d{2}$');
   static final RegExp patternProject = RegExp(r'^\+\S+$');
   static final RegExp patternContext = RegExp(r'^\@\S+$');

test/domain/todo/todo_model_test.dart

@@ -309,6 +309,10 @@ void main() {
           );
           expect(todo.priority, Priority.A);
         });
+        test('incompleted todo with very low priority', () {
+          final todo = Todo.fromString(value: '(Z) Todo');
+          expect(todo.priority, Priority.Z);
+        });
         test('completed short todo (RangeError)', () {
           final todo = Todo.fromString(value: 'x 2022-11-16 (A) Todo');
           expect(todo.priority, Priority.A);
@@ -325,6 +329,10 @@ void main() {
           );
           expect(todo.priority, Priority.A);
         });
+        test('completed todo with very low priority', () {
+          final todo = Todo.fromString(value: 'x 2022-11-16 (Z) Todo');
+          expect(todo.priority, Priority.Z);
+        });
       });
       group('without priority', () {
         test('incompleted short todo (RangeError)', () {