[-]: prev callback no-op 보완

Author: sjsjsj1246

packages/main/src/core/store.ts

@@ -49,8 +49,8 @@ const reducer = (state: State, action: Action): State => {
         };
       }
     case ActionType.PREV:
-      state.tutorial.steps[state.index]?.onPrevStep?.();
       if (state.index > 0) {
+        state.tutorial.steps[state.index]?.onPrevStep?.();
         return {
           ...state,
           index: state.index - 1,

packages/main/test/store.test.tsx

@@ -43,4 +43,24 @@ describe('store step callbacks', () => {
     expect(onPrevStep).toHaveBeenCalledTimes(1);
     expect(screen.getByTestId('title')).toHaveTextContent('Step 1');
   });
+
+  test('tutorial.prev does not invoke onPrevStep when already on the first step', () => {
+    const onPrevStep = jest.fn();
+
+    render(<StateProbe />);
+
+    act(() => {
+      tutorial.open({
+        steps: [{ title: 'Step 1', targetIds: ['first-target'], onPrevStep }],
+        options: {},
+      });
+    });
+
+    act(() => {
+      tutorial.prev();
+    });
+
+    expect(onPrevStep).not.toHaveBeenCalled();
+    expect(screen.getByTestId('title')).toHaveTextContent('Step 1');
+  });
 });