답 입력 완료시 정답/오답 내용 출력

lib/engine/parenthesis-sign.test.ts

@@ -36,12 +36,16 @@ describe("parenthesis sign problem engine", () => {
   it("grades correct and incorrect answers", () => {
     const problem = generateProblem();
 
-    expect(
-      gradeAnswer(problem, {
-        a: problem.distributedA,
-        b: problem.distributedB,
-      }).correct,
-    ).toBe(true);
+    const correctResult = gradeAnswer(problem, {
+      a: problem.distributedA,
+      b: problem.distributedB,
+    });
+
+    expect(correctResult.correct).toBe(true);
+    expect(correctResult.userAnswer).toEqual([
+      problem.distributedA,
+      problem.distributedB,
+    ]);
 
     expect(
       gradeAnswer(problem, {

lib/engine/parenthesis-sign.ts

@@ -120,6 +120,7 @@ export function gradeAnswer(
   return {
     correct:
       answer.a === problem.distributedA && answer.b === problem.distributedB,
+    userAnswer: [answer.a, answer.b],
     correctAnswer: [problem.distributedA, problem.distributedB],
   };
 }

lib/engine/types.ts

@@ -18,5 +18,6 @@ export interface UserAnswer {
 
 export interface GradeResult {
   correct: boolean;
+  userAnswer: [number, number];
   correctAnswer: [number, number];
 }