first cut, with tests

client/src/__tests__/components/GiftTemplate/LiveResults/LiveResults.test.tsx

@@ -19,8 +19,8 @@ const mockQuestions: QuestionType[] = mockGiftQuestions.map((question, index) =>
 });
 
 const mockStudents: StudentType[] = [
-    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: 'Answer 1', isCorrect: true }] },
+    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: ['Answer 1'], isCorrect: true }] },
-    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: 'Answer 2', isCorrect: false }] },
+    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: ['Answer 2'], isCorrect: false }] },
 ];
 
 const mockShowSelectedQuestion = jest.fn();

client/src/__tests__/components/GiftTemplate/LiveResults/LiveResultsTable/LiveResultsTable.test.tsx

@@ -20,8 +20,8 @@ const mockQuestions: QuestionType[] = mockGiftQuestions.map((question, index) =>
 
 
 const mockStudents: StudentType[] = [
-    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: 'Answer 1', isCorrect: true }] },
+    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: ['Answer 1'], isCorrect: true }] },
-    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: 'Answer 2', isCorrect: false }] },
+    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: ['Answer 2'], isCorrect: false }] },
 ];
 
 const mockShowSelectedQuestion = jest.fn();

client/src/__tests__/components/GiftTemplate/LiveResults/LiveResultsTable/TableComponents/LiveResultsTableBody.test.tsx

@@ -20,8 +20,8 @@ const mockQuestions: QuestionType[] = mockGiftQuestions.map((question, index) =>
 });
 
 const mockStudents: StudentType[] = [
-    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: 'Answer 1', isCorrect: true }] },
+    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: ['Answer 1'], isCorrect: true }] },
-    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: 'Answer 2', isCorrect: false }] },
+    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: ['Answer 2'], isCorrect: false }] },
 ];
 
 const mockGetStudentGrade = jest.fn((student: StudentType) => {

client/src/__tests__/components/GiftTemplate/LiveResults/LiveResultsTable/TableComponents/LiveResultsTableFooter.test.tsx

@@ -6,8 +6,8 @@ import LiveResultsTableFooter from 'src/components/LiveResults/LiveResultsTable/
 
 
 const mockStudents: StudentType[] = [
-    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: 'Answer 1', isCorrect: true }] },
+    { id: "1", name: 'Student 1', answers: [{ idQuestion: 1, answer: ['Answer 1'], isCorrect: true }] },
-    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: 'Answer 2', isCorrect: false }] },
+    { id: "2", name: 'Student 2', answers: [{ idQuestion: 2, answer: ['Answer 2'], isCorrect: false }] },
 ];
 
 const mockGetStudentGrade = jest.fn((student: StudentType) => {

client/src/__tests__/components/LiveResults/LiveResults.test.tsx

@@ -19,7 +19,8 @@ const mockGiftQuestions = parse(
     `::Sample Question 1:: Question stem
     {
         =Choice 1
-        ~Choice 2
+        =Choice 2
+        ~Choice 3
     }`);
 
 const mockQuestions: QuestionType[] = mockGiftQuestions.map((question, index) => {
@@ -30,8 +31,9 @@ const mockQuestions: QuestionType[] = mockGiftQuestions.map((question, index) =>
 });
 
 const mockStudents: StudentType[] = [
-    { id: '1', name: 'Student 1', answers: [{ idQuestion: 1, answer: 'Choice 1', isCorrect: true }] },
+    { id: '1', name: 'Student 1', answers: [{ idQuestion: 1, answer: ['Choice 1'], isCorrect: false }] },
-    { id: '2', name: 'Student 2', answers: [{ idQuestion: 1, answer: 'Choice 2', isCorrect: false }] },
+    { id: '2', name: 'Student 2', answers: [{ idQuestion: 1, answer: ['Choice 3'], isCorrect: false }] },
+    { id: '3', name: 'Student 3', answers: [{ idQuestion: 1, answer: ['Choice 1', 'Choice 2'], isCorrect: true }] },
 ];
 
 describe('LiveResults', () => {
@@ -82,7 +84,6 @@ describe('LiveResults', () => {
         });
     });
 
-});
     test('calculates and displays the correct student grades', () => {
         render(
             <LiveResults
@@ -161,3 +162,5 @@ test('displays the correct answers per question', () => {
             expect(correctAnswersElement).toBeInTheDocument();
         });
     });
+
+});

client/src/__tests__/components/QuestionsDisplay/MultipleChoiceQuestionDisplay/MultipleChoiceQuestionDisplay.test.tsx

@@ -73,6 +73,30 @@ describe('MultipleChoiceQuestionDisplay', () => {
         expect(mockHandleOnSubmitAnswer).toHaveBeenCalledWith('Choice 1');
     });
 
+    test('submits multiple selected answers', () => {
+        const choiceButton1 = screen.getByText('Choice 1').closest('button');
+        const choiceButton2 = screen.getByText('Choice 2').closest('button');
+    
+        if (!choiceButton1 || !choiceButton2) throw new Error('Choice buttons not found');
+    
+        // Simulate selecting multiple answers
+        act(() => {
+            fireEvent.click(choiceButton1);
+        });
+        act(() => {
+            fireEvent.click(choiceButton2);
+        });
+    
+        // Simulate submitting the answers
+        const submitButton = screen.getByText('Répondre');
+        act(() => {
+            fireEvent.click(submitButton);
+        });
+    
+        // Verify that the mockHandleOnSubmitAnswer function is called with both answers
+        expect(mockHandleOnSubmitAnswer).toHaveBeenCalledWith(['Choice 1', 'Choice 2']);
+    });
+    
     it('should show ✅ next to the correct answer and ❌ next to the wrong answers when showAnswer is true', async () => {
         const choiceButton = screen.getByText('Choice 1').closest('button');
         if (!choiceButton) throw new Error('Choice button not found');

client/src/__tests__/pages/ManageRoom/IsCorrect.test.tsx

@@ -0,0 +1,353 @@
+import { checkIfIsCorrect } from 'src/pages/Teacher/ManageRoom/useRooms';
+import { HighLowNumericalAnswer, MultipleChoiceQuestion, MultipleNumericalAnswer, NumericalQuestion, RangeNumericalAnswer, ShortAnswerQuestion, SimpleNumericalAnswer, TrueFalseQuestion } from 'gift-pegjs';
+import { AnswerType } from 'src/pages/Student/JoinRoom/JoinRoom';
+import { QuestionType } from 'src/Types/QuestionType';
+
+describe('checkIfIsCorrect', () => {
+    const mockQuestions: QuestionType[] = [
+        {
+            question: {
+                id: '1',
+                type: 'MC',
+                choices: [
+                    { isCorrect: true, formattedText: { text: 'Answer1' } },
+                    { isCorrect: true, formattedText: { text: 'Answer2' } },
+                    { isCorrect: false, formattedText: { text: 'Answer3' } },
+                ],
+            } as MultipleChoiceQuestion,
+        },
+    ];
+
+    test('returns true when all selected answers are correct', () => {
+        const answer: AnswerType = ['Answer1', 'Answer2'];
+        const result = checkIfIsCorrect(answer, 1, mockQuestions);
+        expect(result).toBe(true);
+    });
+
+    test('returns false when some selected answers are incorrect', () => {
+        const answer: AnswerType = ['Answer1', 'Answer3'];
+        const result = checkIfIsCorrect(answer, 1, mockQuestions);
+        expect(result).toBe(false);
+    });
+
+    test('returns false when no answers are selected', () => {
+        const answer: AnswerType = [];
+        const result = checkIfIsCorrect(answer, 1, mockQuestions);
+        expect(result).toBe(false);
+    });
+
+    test('returns false when no correct answers are provided in the question', () => {
+        const mockQuestionsWithNoCorrectAnswers: QuestionType[] = [
+            {
+                question: {
+                    id: '1',
+                    type: 'MC',
+                    choices: [
+                        { isCorrect: false, formattedText: { text: 'Answer1' } },
+                        { isCorrect: false, formattedText: { text: 'Answer2' } },
+                    ],
+                } as MultipleChoiceQuestion,
+            },
+        ];
+        const answer: AnswerType = ['Answer1'];
+        const result = checkIfIsCorrect(answer, 1, mockQuestionsWithNoCorrectAnswers);
+        expect(result).toBe(false);
+    });
+
+    test('returns true for a correct true/false answer', () => {
+        const mockQuestionsTF: QuestionType[] = [
+            {
+                question: {
+                    id: '2',
+                    type: 'TF',
+                    isTrue: true,
+                } as TrueFalseQuestion,
+            },
+        ];
+        const answer: AnswerType = [true];
+        const result = checkIfIsCorrect(answer, 2, mockQuestionsTF);
+        expect(result).toBe(true);
+    });
+
+    test('returns false for an incorrect true/false answer', () => {
+        const mockQuestionsTF: QuestionType[] = [
+            {
+                question: {
+                    id: '2',
+                    type: 'TF',
+                    isTrue: true,
+                } as TrueFalseQuestion,
+            },
+        ];
+        const answer: AnswerType = [false];
+        const result = checkIfIsCorrect(answer, 2, mockQuestionsTF);
+        expect(result).toBe(false);
+    });
+
+    test('returns false for a true/false question with no answer', () => {
+        const mockQuestionsTF: QuestionType[] = [
+            {
+                question: {
+                    id: '2',
+                    type: 'TF',
+                    isTrue: true,
+                } as TrueFalseQuestion,
+            },
+        ];
+        const answer: AnswerType = [];
+        const result = checkIfIsCorrect(answer, 2, mockQuestionsTF);
+        expect(result).toBe(false);
+    });
+
+    test('returns true for a correct true/false answer when isTrue is false', () => {
+        const mockQuestionsTF: QuestionType[] = [
+            {
+                question: {
+                    id: '3',
+                    type: 'TF',
+                    isTrue: false, // Correct answer is false
+                } as TrueFalseQuestion,
+            },
+        ];
+        const answer: AnswerType = [false];
+        const result = checkIfIsCorrect(answer, 3, mockQuestionsTF);
+        expect(result).toBe(true);
+    });
+
+    test('returns false for an incorrect true/false answer when isTrue is false', () => {
+        const mockQuestionsTF: QuestionType[] = [
+            {
+                question: {
+                    id: '3',
+                    type: 'TF',
+                    isTrue: false, // Correct answer is false
+                } as TrueFalseQuestion,
+            },
+        ];
+        const answer: AnswerType = [true];
+        const result = checkIfIsCorrect(answer, 3, mockQuestionsTF);
+        expect(result).toBe(false);
+    });
+
+    test('returns true for a correct short answer', () => {
+        const mockQuestionsShort: QuestionType[] = [
+            {
+                question: {
+                    id: '4',
+                    type: 'Short',
+                    choices: [
+                        { text: 'CorrectAnswer1' },
+                        { text: 'CorrectAnswer2' },
+                    ],
+                } as ShortAnswerQuestion,
+            },
+        ];
+        const answer: AnswerType = ['CorrectAnswer1'];
+        const result = checkIfIsCorrect(answer, 4, mockQuestionsShort);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for an incorrect short answer', () => {
+        const mockQuestionsShort: QuestionType[] = [
+            {
+                question: {
+                    id: '4',
+                    type: 'Short',
+                    choices: [
+                        { text: 'CorrectAnswer1' },
+                        { text: 'CorrectAnswer2' },
+                    ],
+                } as ShortAnswerQuestion,
+            },
+        ];
+        const answer: AnswerType = ['WrongAnswer'];
+        const result = checkIfIsCorrect(answer, 4, mockQuestionsShort);
+        expect(result).toBe(false);
+    });
+    
+    test('returns true for a correct short answer with case insensitivity', () => {
+        const mockQuestionsShort: QuestionType[] = [
+            {
+                question: {
+                    id: '4',
+                    type: 'Short',
+                    choices: [
+                        { text: 'CorrectAnswer1' },
+                        { text: 'CorrectAnswer2' },
+                    ],
+                } as ShortAnswerQuestion,
+            },
+        ];
+        const answer: AnswerType = ['correctanswer1']; // Lowercase version of the correct answer
+        const result = checkIfIsCorrect(answer, 4, mockQuestionsShort);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for a short answer question with no answer', () => {
+        const mockQuestionsShort: QuestionType[] = [
+            {
+                question: {
+                    id: '4',
+                    type: 'Short',
+                    choices: [
+                        { text: 'CorrectAnswer1' },
+                        { text: 'CorrectAnswer2' },
+                    ],
+                } as ShortAnswerQuestion,
+            },
+        ];
+        const answer: AnswerType = [];
+        const result = checkIfIsCorrect(answer, 4, mockQuestionsShort);
+        expect(result).toBe(false);
+    });
+
+
+    test('returns true for a correct simple numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '5',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'simple', number: 42 } as SimpleNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [42]; // User's answer
+        const result = checkIfIsCorrect(answer, 5, mockQuestionsNumerical);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for an incorrect simple numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '5',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'simple', number: 42 } as SimpleNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [43]; // User's answer
+        const result = checkIfIsCorrect(answer, 5, mockQuestionsNumerical);
+        expect(result).toBe(false);
+    });
+    
+    test('returns true for a correct range numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '6',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'range', number: 50, range: 5 } as RangeNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [52]; // User's answer within the range (50 ± 5)
+        const result = checkIfIsCorrect(answer, 6, mockQuestionsNumerical);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for an out-of-range numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '6',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'range', number: 50, range: 5 } as RangeNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [56]; // User's answer outside the range (50 ± 5)
+        const result = checkIfIsCorrect(answer, 6, mockQuestionsNumerical);
+        expect(result).toBe(false);
+    });
+    
+    test('returns true for a correct high-low numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '7',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'high-low', numberHigh: 100, numberLow: 90 } as HighLowNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [95]; // User's answer within the range (90 to 100)
+        const result = checkIfIsCorrect(answer, 7, mockQuestionsNumerical);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for an out-of-range high-low numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '7',
+                    type: 'Numerical',
+                    choices: [
+                        { type: 'high-low', numberHigh: 100, numberLow: 90 } as HighLowNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [105]; // User's answer outside the range (90 to 100)
+        const result = checkIfIsCorrect(answer, 7, mockQuestionsNumerical);
+        expect(result).toBe(false);
+    });
+    
+    test('returns true for a correct multiple numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '8',
+                    type: 'Numerical',
+                    choices: [
+                        {
+                            isCorrect: true,
+                            answer: { type: 'simple', number: 42 } as SimpleNumericalAnswer,
+                        } as MultipleNumericalAnswer,
+                        {
+                            isCorrect: false,
+                            answer: { type: 'high-low', numberHigh: 100, numberLow: 90 } as HighLowNumericalAnswer,
+                            formattedFeedback: { text: 'You guessed way too high' },
+                        }
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [42]; // User's answer matches the correct multiple numerical answer
+        const result = checkIfIsCorrect(answer, 8, mockQuestionsNumerical);
+        expect(result).toBe(true);
+    });
+    
+    test('returns false for an incorrect multiple numerical answer', () => {
+        const mockQuestionsNumerical: QuestionType[] = [
+            {
+                question: {
+                    id: '8',
+                    type: 'Numerical',
+                    choices: [
+                        {
+                            type: 'multiple',
+                            isCorrect: true,
+                            answer: { type: 'simple', number: 42 } as SimpleNumericalAnswer,
+                        } as MultipleNumericalAnswer,
+                    ],
+                } as NumericalQuestion,
+            },
+        ];
+        const answer: AnswerType = [43]; // User's answer does not match the correct multiple numerical answer
+        const result = checkIfIsCorrect(answer, 8, mockQuestionsNumerical);
+        expect(result).toBe(false);
+    });
+
+});

client/src/__tests__/pages/ManageRoom/ManageRoom.test.tsx

@@ -44,7 +44,7 @@ const mockStudents: StudentType[] = [
 ];
 
 const mockAnswerData: AnswerReceptionFromBackendType = {
-    answer: 'Answer1',
+    answer: ['Answer1'],
     idQuestion: 1,
     idUser: '1',
     username: 'Student 1',
@@ -233,7 +233,7 @@ describe('ManageRoom', () => {
     
         await act(async () => {
             const createSuccessCallback = (mockSocket.on as jest.Mock).mock.calls.find(call => call[0] === 'create-success')[1];
-            createSuccessCallback('test-room-name');
+            createSuccessCallback('Test Room');
         });
     
         const launchButton = screen.getByText('Lancer');
@@ -256,6 +256,7 @@ describe('ManageRoom', () => {
         });
     
         await waitFor(() => {
+            // console.info(consoleSpy.mock.calls);
             expect(consoleSpy).toHaveBeenCalledWith(
                 'Received answer from Student 1 for question 1: Answer1'
             );
@@ -294,3 +295,4 @@ describe('ManageRoom', () => {
         });
     });
 });
+

client/src/__tests__/pages/Student/StudentModeQuiz/StudentModeQuiz.test.tsx

@@ -8,7 +8,7 @@ import { QuestionType } from 'src/Types/QuestionType';
 import { AnswerSubmissionToBackendType } from 'src/services/WebsocketService';
 
 const mockGiftQuestions = parse(
-    `::Sample Question 1:: Sample Question 1 {=Option A ~Option B}
+    `::Sample Question 1:: Sample Question 1 {=Option A =Option B ~Option C}
     
     ::Sample Question 2:: Sample Question 2 {T}`);
 
@@ -23,9 +23,6 @@ const mockSubmitAnswer = jest.fn();
 const mockDisconnectWebSocket = jest.fn();
 
 beforeEach(() => {
-    // Clear local storage before each test
-    // localStorage.clear();
-
     render(
         <MemoryRouter>
             <StudentModeQuiz
@@ -54,7 +51,7 @@ describe('StudentModeQuiz', () => {
             fireEvent.click(screen.getByText('Répondre'));
         });
 
-        expect(mockSubmitAnswer).toHaveBeenCalledWith('Option A', 1);
+        expect(mockSubmitAnswer).toHaveBeenCalledWith(['Option A'], 1);
     });
 
     test('handles shows feedback for an already answered question', async () => {
@@ -65,13 +62,13 @@ describe('StudentModeQuiz', () => {
         act(() => {
             fireEvent.click(screen.getByText('Répondre'));
         });
-        expect(mockSubmitAnswer).toHaveBeenCalledWith('Option A', 1);
+        expect(mockSubmitAnswer).toHaveBeenCalledWith(['Option A'], 1);
 
         const firstButtonA = screen.getByRole("button", {name: '✅ A Option A'});
         expect(firstButtonA).toBeInTheDocument();
         expect(firstButtonA.querySelector('.selected')).toBeInTheDocument();
 
-        expect(screen.getByRole("button", {name: '❌ B Option B'})).toBeInTheDocument();
+        expect(screen.getByRole("button", {name: '✅ B Option B'})).toBeInTheDocument();
         expect(screen.queryByText('Répondre')).not.toBeInTheDocument();
 
         // Navigate to the next question
@@ -87,12 +84,12 @@ describe('StudentModeQuiz', () => {
         });
         expect(await screen.findByText('Sample Question 1')).toBeInTheDocument();
 
-        // Since answers are mocked, the it doesn't recognize the question as already answered
+        // Since answers are mocked, it doesn't recognize the question as already answered
         // TODO these tests are partially faked, need to be fixed if we can mock the answers
         // const buttonA = screen.getByRole("button", {name: '✅ A Option A'});
         const buttonA = screen.getByRole("button", {name: 'A Option A'});
         expect(buttonA).toBeInTheDocument();
-        // const buttonB = screen.getByRole("button", {name: '❌ B Option B'});
+        // const buttonB = screen.getByRole("button", {name: '✅ B Option B'});
         const buttonB = screen.getByRole("button", {name: 'B Option B'});
         expect(buttonB).toBeInTheDocument();
         // // "Option A" div inside the name of button should have selected class
@@ -122,4 +119,28 @@ describe('StudentModeQuiz', () => {
         expect(screen.getByText('Sample Question 2')).toBeInTheDocument();
         expect(screen.getByText('Répondre')).toBeInTheDocument();
     });
+
+    test('allows multiple answers to be selected for a question', async () => {
+        // Simulate selecting multiple answers
+        act(() => {
+            fireEvent.click(screen.getByText('Option A'));
+        });
+        act(() => {
+            fireEvent.click(screen.getByText('Option B'));
+        });
+
+        // Simulate submitting the answers
+        act(() => {
+            fireEvent.click(screen.getByText('Répondre'));
+        });
+
+        // Verify that the mockSubmitAnswer function is called with both answers
+        expect(mockSubmitAnswer).toHaveBeenCalledWith(['Option A', 'Option B'], 1);
+
+        // Verify that the selected answers are displayed as selected
+        const buttonA = screen.getByRole('button', { name: '✅ A Option A' });
+        const buttonB = screen.getByRole('button', { name: '✅ B Option B' });
+        expect(buttonA).toBeInTheDocument();
+        expect(buttonB).toBeInTheDocument();
+    });
 });

client/src/components/QuestionsDisplay/MultipleChoiceQuestionDisplay/MultipleChoiceQuestionDisplay.tsx

@@ -15,8 +15,7 @@ interface Props {
 
 const MultipleChoiceQuestionDisplay: React.FC<Props> = (props) => {
     const { question, showAnswer, handleOnSubmitAnswer, passedAnswer } = props;
-    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || '');
+    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || []);
-
 
     let disableButton = false;
     if (handleOnSubmitAnswer === undefined) {
@@ -30,61 +29,81 @@ const MultipleChoiceQuestionDisplay: React.FC<Props> = (props) => {
     }, [passedAnswer]);
 
     const handleOnClickAnswer = (choice: string) => {
-        setAnswer(choice);
+        setAnswer((prevAnswer) => {
+            if (prevAnswer.includes(choice)) {
+                // Remove the choice if it's already selected
+                return prevAnswer.filter((selected) => selected !== choice);
+            } else {
+                // Add the choice if it's not already selected
+                return [...prevAnswer, choice];
+            }
+        });
     };
+
     const alpha = Array.from(Array(26)).map((_e, i) => i + 65);
     const alphabet = alpha.map((x) => String.fromCharCode(x));
-    return (
 
+    return (
         <div className="question-container">
             <div className="question content">
                 <div dangerouslySetInnerHTML={{ __html: FormattedTextTemplate(question.formattedStem) }} />
             </div>
             <div className="choices-wrapper mb-1">
-                
                 {question.choices.map((choice, i) => {
-                    const selected = answer === choice.formattedText.text ? 'selected' : '';
+                    const selected = answer.includes(choice.formattedText.text) ? 'selected' : '';
                     return (
                         <div key={choice.formattedText.text + i} className="choice-container">
                             <Button
                                 variant="text"
                                 className="button-wrapper"
                                 disabled={disableButton}
-                                onClick={() => !showAnswer && handleOnClickAnswer(choice.formattedText.text)}>
+                                onClick={() => !showAnswer && handleOnClickAnswer(choice.formattedText.text)}
-                                {showAnswer? (<div> {(choice.isCorrect ? '✅' : '❌')}</div>)
+                            >
-                                :``}
+                                {showAnswer ? (
+                                    <div>{choice.isCorrect ? '✅' : '❌'}</div>
+                                ) : (
+                                    ''
+                                )}
                                 <div className={`circle ${selected}`}>{alphabet[i]}</div>
                                 <div className={`answer-text ${selected}`}>
-                                    <div dangerouslySetInnerHTML={{ __html: FormattedTextTemplate(choice.formattedText) }} />
+                                    <div
+                                        dangerouslySetInnerHTML={{
+                                            __html: FormattedTextTemplate(choice.formattedText),
+                                        }}
+                                    />
                                 </div>
                                 {choice.formattedFeedback && showAnswer && (
                                     <div className="feedback-container mb-1 mt-1/2">
-                                    <div dangerouslySetInnerHTML={{ __html: FormattedTextTemplate(choice.formattedFeedback) }} />
+                                        <div
+                                            dangerouslySetInnerHTML={{
+                                                __html: FormattedTextTemplate(choice.formattedFeedback),
+                                            }}
+                                        />
                                     </div>
                                 )}
                             </Button>
-
                         </div>
                     );
                 })}
             </div>
             {question.formattedGlobalFeedback && showAnswer && (
                 <div className="global-feedback mb-2">
-                                    <div dangerouslySetInnerHTML={{ __html: FormattedTextTemplate(question.formattedGlobalFeedback) }} />
+                    <div
+                        dangerouslySetInnerHTML={{
+                            __html: FormattedTextTemplate(question.formattedGlobalFeedback),
+                        }}
+                    />
                 </div>
             )}
-            
             {!showAnswer && handleOnSubmitAnswer && (
-                
                 <Button
                     variant="contained"
                     onClick={() =>
-                        answer !== "" && handleOnSubmitAnswer && handleOnSubmitAnswer(answer)
+                        answer.length > 0 && handleOnSubmitAnswer && handleOnSubmitAnswer(answer)
                     }
-                    disabled={answer === '' || answer === null}
+                    disabled={answer.length === 0}
                 >
                     Répondre
-                    
                 </Button>
             )}
         </div>

client/src/components/QuestionsDisplay/NumericalQuestionDisplay/NumericalQuestionDisplay.tsx

@@ -17,7 +17,7 @@ interface Props {
 const NumericalQuestionDisplay: React.FC<Props> = (props) => {
     const { question, showAnswer, handleOnSubmitAnswer, passedAnswer } =
         props;
-    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || '');
+    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || []);
     const correctAnswers = question.choices;
     let correctAnswer = '';
 
@@ -69,7 +69,7 @@ const NumericalQuestionDisplay: React.FC<Props> = (props) => {
                             id={question.formattedStem.text}
                             name={question.formattedStem.text}
                             onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
-                                setAnswer(e.target.valueAsNumber);
+                                setAnswer([e.target.valueAsNumber]);
                             }}
                             inputProps={{ 'data-testid': 'number-input' }}
                         />
@@ -87,7 +87,7 @@ const NumericalQuestionDisplay: React.FC<Props> = (props) => {
                                 handleOnSubmitAnswer &&
                                 handleOnSubmitAnswer(answer)
                             }
-                            disabled={answer === "" || isNaN(answer as number)}
+                            disabled={answer === undefined || answer === null || isNaN(answer[0] as number)}
                         >
                             Répondre
                         </Button>

client/src/components/QuestionsDisplay/ShortAnswerQuestionDisplay/ShortAnswerQuestionDisplay.tsx

@@ -16,7 +16,7 @@ interface Props {
 const ShortAnswerQuestionDisplay: React.FC<Props> = (props) => {
 
     const { question, showAnswer, handleOnSubmitAnswer, passedAnswer } = props;
-    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || '');
+    const [answer, setAnswer] = useState<AnswerType>(passedAnswer || []);
     
     useEffect(() => {
     if (passedAnswer !== undefined) {
@@ -58,7 +58,7 @@ const ShortAnswerQuestionDisplay: React.FC<Props> = (props) => {
                             id={question.formattedStem.text}
                             name={question.formattedStem.text}
                             onChange={(e) => {
-                                setAnswer(e.target.value);
+                                setAnswer([e.target.value]);
                             }}
                             disabled={showAnswer}
                             aria-label="short-answer-input"
@@ -72,7 +72,7 @@ const ShortAnswerQuestionDisplay: React.FC<Props> = (props) => {
                                 handleOnSubmitAnswer &&
                                 handleOnSubmitAnswer(answer)
                             }
-                            disabled={answer === null || answer === ''}
+                            disabled={answer === null || answer === undefined || answer.length === 0}
                         >
                             Répondre
                         </Button>

client/src/components/QuestionsDisplay/TrueFalseQuestionDisplay/TrueFalseQuestionDisplay.tsx

@@ -23,9 +23,9 @@ const TrueFalseQuestionDisplay: React.FC<Props> = (props) => {
     }
 
     useEffect(() => {
-        console.log("passedAnswer", answer);
+        console.log("passedAnswer", passedAnswer);
-                if (passedAnswer === true || passedAnswer === false) {
+        if (passedAnswer && (passedAnswer[0] === true || passedAnswer[0] === false)) {
-                    setAnswer(passedAnswer);
+            setAnswer(passedAnswer[0]);
         } else {
             setAnswer(undefined);
         }
@@ -33,8 +33,8 @@ const TrueFalseQuestionDisplay: React.FC<Props> = (props) => {
 
     const [answer, setAnswer] = useState<boolean | undefined>(() => {
 
-        if (passedAnswer === true || passedAnswer === false) {
+        if (passedAnswer && (passedAnswer[0] === true || passedAnswer[0] === false)) {
-            return passedAnswer;
+            return passedAnswer[0];
         }
 
         return undefined;
@@ -95,8 +95,7 @@ const TrueFalseQuestionDisplay: React.FC<Props> = (props) => {
                 <Button
                     variant="contained"
                     onClick={() =>
-                        answer !== undefined && handleOnSubmitAnswer && handleOnSubmitAnswer(answer)
+                        answer !== undefined && handleOnSubmitAnswer && handleOnSubmitAnswer([answer])
-
                     }
                     disabled={answer === undefined}
                 >

client/src/pages/Student/JoinRoom/JoinRoom.tsx

@@ -17,7 +17,7 @@ import LoginContainer from 'src/components/LoginContainer/LoginContainer'
 
 import ApiService from '../../../services/ApiService'
 
-export type AnswerType = string | number | boolean;
+export type AnswerType = Array<string | number | boolean>;
 
 const JoinRoom: React.FC = () => {
     const [roomName, setRoomName] = useState('');

client/src/pages/Teacher/ManageRoom/ManageRoom.tsx

@@ -1,12 +1,7 @@
 import React, { useEffect, useState } from 'react';
 import { useNavigate, useParams } from 'react-router-dom';
 import { Socket } from 'socket.io-client';
-import { ParsedGIFTQuestion, BaseQuestion, parse, Question } from 'gift-pegjs';
+import { BaseQuestion, parse, Question } from 'gift-pegjs';
-import {
-    isSimpleNumericalAnswer,
-    isRangeNumericalAnswer,
-    isHighLowNumericalAnswer
-} from 'gift-pegjs/typeGuards';
 import LiveResultsComponent from 'src/components/LiveResults/LiveResults';
 import webSocketService, {
     AnswerReceptionFromBackendType
@@ -24,7 +19,7 @@ import QuestionDisplay from 'src/components/QuestionsDisplay/QuestionDisplay';
 import ApiService from '../../../services/ApiService';
 import { QuestionType } from 'src/Types/QuestionType';
 import { Button } from '@mui/material';
-import { AnswerType } from 'src/pages/Student/JoinRoom/JoinRoom';
+import { checkIfIsCorrect } from './useRooms';
 
 const ManageRoom: React.FC = () => {
     const navigate = useNavigate();
@@ -346,63 +341,6 @@ const ManageRoom: React.FC = () => {
         navigate('/teacher/dashboard');
     };
 
-    function checkIfIsCorrect(
-        answer: AnswerType,
-        idQuestion: number,
-        questions: QuestionType[]
-    ): boolean {
-        const questionInfo = questions.find((q) =>
-            q.question.id ? q.question.id === idQuestion.toString() : false
-        ) as QuestionType | undefined;
-
-        const answerText = answer.toString();
-        if (questionInfo) {
-            const question = questionInfo.question as ParsedGIFTQuestion;
-            if (question.type === 'TF') {
-                return (
-                    (question.isTrue && answerText == 'true') ||
-                    (!question.isTrue && answerText == 'false')
-                );
-            } else if (question.type === 'MC') {
-                return question.choices.some(
-                    (choice) => choice.isCorrect && choice.formattedText.text === answerText
-                );
-            } else if (question.type === 'Numerical') {
-                if (isHighLowNumericalAnswer(question.choices[0])) {
-                    const choice = question.choices[0];
-                    const answerNumber = parseFloat(answerText);
-                    if (!isNaN(answerNumber)) {
-                        return (
-                            answerNumber <= choice.numberHigh && answerNumber >= choice.numberLow
-                        );
-                    }
-                }
-                if (isRangeNumericalAnswer(question.choices[0])) {
-                    const answerNumber = parseFloat(answerText);
-                    const range = question.choices[0].range;
-                    const correctAnswer = question.choices[0].number;
-                    if (!isNaN(answerNumber)) {
-                        return (
-                            answerNumber <= correctAnswer + range &&
-                            answerNumber >= correctAnswer - range
-                        );
-                    }
-                }
-                if (isSimpleNumericalAnswer(question.choices[0])) {
-                    const answerNumber = parseFloat(answerText);
-                    if (!isNaN(answerNumber)) {
-                        return answerNumber === question.choices[0].number;
-                    }
-                }
-            } else if (question.type === 'Short') {
-                return question.choices.some(
-                    (choice) => choice.text.toUpperCase() === answerText.toUpperCase()
-                );
-            }
-        }
-        return false;
-    }
-
     if (!formattedRoomName) {
         return (
             <div className="center">

client/src/pages/Teacher/ManageRoom/useRooms.ts

@@ -1,8 +1,15 @@
 import { useContext } from 'react';
 import { RoomType } from 'src/Types/RoomType';
 import { createContext } from 'react';
-
+import { MultipleNumericalAnswer, NumericalAnswer, ParsedGIFTQuestion } from 'gift-pegjs';
-//import { RoomContext } from './RoomContext';
+import { QuestionType } from 'src/Types/QuestionType';
+import { AnswerType } from 'src/pages/Student/JoinRoom/JoinRoom';
+import {
+  isSimpleNumericalAnswer,
+  isRangeNumericalAnswer,
+  isHighLowNumericalAnswer,
+  isMultipleNumericalAnswer
+} from 'gift-pegjs/typeGuards';
 
 type RoomContextType = {
     rooms: RoomType[];
@@ -18,3 +25,136 @@ export const useRooms = () => {
   if (!context) throw new Error('useRooms must be used within a RoomProvider');
   return context;
 };
+
+/**
+ * Checks if the answer is correct - logic varies by type of question!
+ * True/False: answer must match the isTrue property
+ * Multiple Choice: answer must match the correct choice(s)
+ * Numerical: answer must be within the range or equal to the number (for each type of correct answer)
+ * Short Answer: answer must match the correct choice(s) (case-insensitive)
+ * @param answer 
+ * @param idQuestion 
+ * @param questions 
+ * @returns 
+ */
+export function checkIfIsCorrect(
+  answer: AnswerType,
+  idQuestion: number,
+  questions: QuestionType[]
+): boolean {
+  const questionInfo = questions.find((q) =>
+    q.question.id ? q.question.id === idQuestion.toString() : false
+  ) as QuestionType | undefined;
+
+  const simpleAnswerText = answer.toString();
+  if (questionInfo) {
+    const question = questionInfo.question as ParsedGIFTQuestion;
+    if (question.type === 'TF') {
+      return (
+        (question.isTrue && simpleAnswerText == 'true') ||
+        (!question.isTrue && simpleAnswerText == 'false')
+      );
+    } else if (question.type === 'MC') {
+      const correctAnswers = question.choices.filter((choice) => choice.isCorrect
+        /* || (choice.weight && choice.weight > 0)*/  // handle weighted answers
+      );
+      const multipleAnswers = Array.isArray(answer) ? answer : [answer as string];
+      if (correctAnswers.length === 0) {
+        return false;
+      }
+      return correctAnswers.every(
+        (choice) => multipleAnswers.includes(choice.formattedText.text)
+      );
+    } else if (question.type === 'Numerical') {
+      if (isMultipleNumericalAnswer(question.choices[0])) { // Multiple numerical answers
+        // check to see if answer[0] is a match for any of the choices that isCorrect
+        const correctChoices = question.choices.filter((choice) => isMultipleNumericalAnswer(choice) && choice.isCorrect);
+        if (correctChoices.length === 0) { // weird case where there are multiple numerical answers but none are correct
+          return false;
+        }
+        return correctChoices.some((choice) => {
+          // narrow choice to MultipleNumericalAnswer type
+          const multipleNumericalChoice = choice as MultipleNumericalAnswer;
+          return isCorrectNumericalAnswer(multipleNumericalChoice.answer, simpleAnswerText);
+        });
+      }
+      if (isHighLowNumericalAnswer(question.choices[0])) {
+        // const choice = question.choices[0];
+        // const answerNumber = parseFloat(simpleAnswerText);
+        // if (!isNaN(answerNumber)) {
+        //   return (
+        //     answerNumber <= choice.numberHigh && answerNumber >= choice.numberLow
+        //   );
+        // }
+        return isCorrectNumericalAnswer(question.choices[0], simpleAnswerText);
+      }
+      if (isRangeNumericalAnswer(question.choices[0])) {
+        // const answerNumber = parseFloat(simpleAnswerText);
+        // const range = question.choices[0].range;
+        // const correctAnswer = question.choices[0].number;
+        // if (!isNaN(answerNumber)) {
+        //   return (
+        //     answerNumber <= correctAnswer + range &&
+        //     answerNumber >= correctAnswer - range
+        //   );
+        // }
+        return isCorrectNumericalAnswer(question.choices[0], simpleAnswerText);
+      }
+      if (isSimpleNumericalAnswer(question.choices[0])) {
+        // const answerNumber = parseFloat(simpleAnswerText);
+        // if (!isNaN(answerNumber)) {
+        //   return answerNumber === question.choices[0].number;
+        // }
+        return isCorrectNumericalAnswer(question.choices[0], simpleAnswerText);
+      }
+    } else if (question.type === 'Short') {
+      return question.choices.some(
+        (choice) => choice.text.toUpperCase() === simpleAnswerText.toUpperCase()
+      );
+    }
+  }
+  return false;
+}
+
+/**
+* Determines if a numerical answer is correct based on the type of numerical answer.
+* @param correctAnswer The correct answer (of type NumericalAnswer).
+* @param userAnswer The user's answer (as a string or number).
+* @returns True if the user's answer is correct, false otherwise.
+*/
+export function isCorrectNumericalAnswer(
+  correctAnswer: NumericalAnswer,
+  userAnswer: string | number
+): boolean {
+  const answerNumber = typeof userAnswer === 'string' ? parseFloat(userAnswer) : userAnswer;
+
+  if (isNaN(answerNumber)) {
+      return false; // User's answer is not a valid number
+  }
+
+  if (isSimpleNumericalAnswer(correctAnswer)) {
+      // Exact match for simple numerical answers
+      return answerNumber === correctAnswer.number;
+  }
+
+  if (isRangeNumericalAnswer(correctAnswer)) {
+      // Check if the user's answer is within the range
+      const { number, range } = correctAnswer;
+      return answerNumber >= number - range && answerNumber <= number + range;
+  }
+
+  if (isHighLowNumericalAnswer(correctAnswer)) {
+      // Check if the user's answer is within the high-low range
+      const { numberLow, numberHigh } = correctAnswer;
+      return answerNumber >= numberLow && answerNumber <= numberHigh;
+  }
+
+  // if (isMultipleNumericalAnswer(correctAnswer)) {
+  //     // Check if the user's answer matches any of the multiple numerical answers
+  //     return correctAnswer.answer.some((choice) =>
+  //         isCorrectNumericalAnswer(choice, answerNumber)
+  //     );
+  // }
+
+  return false; // Default to false if the answer type is not recognized
+}