fix flutter tests

apps/calculator/test/widget_test.dart

@@ -1 +1,5 @@
-void main() {}
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('TODO: test calculator app',(){});
+}

apps/rewordle/lib/persistence.dart

@@ -72,10 +72,10 @@ class GameState {
     return '$correctWord|$wrongLetters|$wrongPosLetters|$okLetters|$submissionsString';
   }
 
-  String? addWord(String word) {
+  String? addWord(String word, [bool skipWordListValidation = false]) {
     final letters = word.split('');
     if (letters.length != 5) return 'Not 5 letters long';
-    if (!VALID_WORDS.contains(word)) return 'Not in word list';
+    if (!(skipWordListValidation || VALID_WORDS.contains(word))) return 'Not in word list';
     final correct = correctWord.split('');
 
     final checked = <LetterData>[];

apps/rewordle/test/persistence_test.dart

@@ -21,7 +21,7 @@ void main() {
   });
   test('determines letters at correct positions and not in word', () {
     final s = GameState('AAAAA');
-    expect(s.addWord('ABBAA'), isNull);
+    expect(s.addWord('ABBAA', true), isNull);
 
     expect(s.submitted[0][0].state, LetterCorrectness.ok);
     expect(s.submitted[0][1].state, LetterCorrectness.err);
@@ -31,7 +31,7 @@ void main() {
   });
   test('determines letters at wrong positions', () {
     final s = GameState('ABCDE');
-    expect(s.addWord('XCXEE'), isNull);
+    expect(s.addWord('XCXEE', true), isNull);
 
     expect(s.submitted[0][0].state, LetterCorrectness.err);
     expect(s.submitted[0][1].state, LetterCorrectness.warn);

packages/app_base/test/app_base_test.dart

@@ -1 +1,5 @@
-void main() {}
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('TODO: test app_base package',(){});
+}

packages/file_entry/test/file_entry_test.dart

@@ -1,3 +1,5 @@
+import 'package:flutter_test/flutter_test.dart';
+
 void main() {
-  // TODO
+  test('TODO: test file_entry package',(){});
 }