shufle order

packages/practice_engine/test/attempt_flow_test.dart

@@ -3,6 +3,7 @@ import 'package:practice_engine/models/deck.dart';
 import 'package:practice_engine/models/deck_config.dart';
 import 'package:practice_engine/models/question.dart';
 import 'package:practice_engine/logic/attempt_service.dart';
+import 'package:practice_engine/logic/deck_service.dart';
 
 void main() {
   group('Attempt Flow', () {
@@ -152,6 +153,51 @@ void main() {
       expect(updated.consecutiveCorrect, equals(3));
       expect(updated.isKnown, equals(true));
     });
+
+    test('processAttempt preserves manual mark as known when using current deck state', () {
+      // One question, not known, no streak
+      final question = Question(
+        id: 'q1',
+        prompt: 'Test',
+        answers: ['A', 'B'],
+        correctAnswerIndices: [0],
+        consecutiveCorrect: 0,
+        isKnown: false,
+      );
+
+      final testDeck = Deck(
+        id: 'deck1',
+        title: 'Test',
+        description: 'Test',
+        questions: [question],
+        config: const DeckConfig(requiredConsecutiveCorrect: 3),
+      );
+
+      final attempt = attemptService.createAttempt(
+        deck: testDeck,
+        attemptSize: 1,
+      );
+      expect(attempt.questions.single.isKnown, isFalse);
+
+      // User marks as known during the attempt (as in the app)
+      final deckWithManualKnown = DeckService.markQuestionAsKnown(
+        deck: testDeck,
+        questionId: question.id,
+      );
+      expect(deckWithManualKnown.questions.single.isKnown, isTrue);
+
+      // Complete attempt with correct answer, passing deck that has manual known
+      final answers = {question.id: question.correctIndices.first};
+      final result = attemptService.processAttempt(
+        deck: deckWithManualKnown,
+        attempt: attempt,
+        answers: answers,
+      );
+
+      // Manual "known" must be preserved in the result
+      final updated = result.updatedDeck.questions.first;
+      expect(updated.isKnown, isTrue, reason: 'Manual mark as known must count towards known after attempt');
+    });
   });
 }
 

packages/practice_engine/test/deck_test.dart

@@ -96,6 +96,81 @@ void main() {
       expect(deck.practicePercentage, equals(100.0));
     });
 
+    test('progressPercentage is 0 for empty deck', () {
+      final deck = Deck(
+        id: 'deck1',
+        title: 'Empty Deck',
+        description: 'No questions',
+        questions: [],
+        config: defaultConfig,
+      );
+
+      expect(deck.progressPercentage, equals(0.0));
+    });
+
+    test('progressPercentage equals practicePercentage when no partial streak', () {
+      final deck = Deck(
+        id: 'deck1',
+        title: 'Math Deck',
+        description: 'Basic math',
+        questions: sampleQuestions,
+        config: defaultConfig,
+      );
+
+      expect(deck.progressPercentage, closeTo(deck.practicePercentage, 0.01));
+    });
+
+    test('progressPercentage is 100 when all questions are known', () {
+      final allKnown = sampleQuestions.map((q) => q.copyWith(isKnown: true)).toList();
+      final deck = Deck(
+        id: 'deck1',
+        title: 'All Known',
+        description: 'All known',
+        questions: allKnown,
+        config: defaultConfig,
+      );
+
+      expect(deck.progressPercentage, equals(100.0));
+    });
+
+    test('progressPercentage includes partial credit from consecutiveCorrect', () {
+      // requiredConsecutiveCorrect is 3 (default). 3 questions: none known, each at 2/3
+      final withPartial = [
+        Question(id: 'q1', prompt: 'A', answers: ['x'], correctAnswerIndices: [0], consecutiveCorrect: 2, isKnown: false),
+        Question(id: 'q2', prompt: 'B', answers: ['x'], correctAnswerIndices: [0], consecutiveCorrect: 2, isKnown: false),
+        Question(id: 'q3', prompt: 'C', answers: ['x'], correctAnswerIndices: [0], consecutiveCorrect: 2, isKnown: false),
+      ];
+      final deck = Deck(
+        id: 'deck1',
+        title: 'Partial',
+        description: 'Partial progress',
+        questions: withPartial,
+        config: defaultConfig,
+      );
+
+      expect(deck.practicePercentage, equals(0.0));
+      expect(deck.progressPercentage, closeTo(66.67, 0.01)); // 3 * (2/3) / 3 * 100
+    });
+
+    test('progressPercentage mixes known and partial correctly', () {
+      final config = DeckConfig(requiredConsecutiveCorrect: 3);
+      final questions = [
+        Question(id: 'q1', prompt: 'A', answers: ['x'], correctAnswerIndices: [0], isKnown: true),
+        Question(id: 'q2', prompt: 'B', answers: ['x'], correctAnswerIndices: [0], consecutiveCorrect: 2, isKnown: false),
+        Question(id: 'q3', prompt: 'C', answers: ['x'], correctAnswerIndices: [0], consecutiveCorrect: 0, isKnown: false),
+      ];
+      final deck = Deck(
+        id: 'deck1',
+        title: 'Mixed',
+        description: 'Mixed',
+        questions: questions,
+        config: config,
+      );
+
+      // 1.0 + 2/3 + 0 = 1.667; 1.667/3*100 ≈ 55.56
+      expect(deck.progressPercentage, closeTo(55.56, 0.01));
+    });
+
     test('copyWith creates new deck with updated fields', () {
       final deck = Deck(
         id: 'deck1',