e2e 구조변경

backend/internal/handler/auth_handler_link_test.go

@@ -121,3 +121,26 @@ func TestEnchantedLinkFlow_Sms_Success(t *testing.T) {
 	json.NewDecoder(resp.Body).Decode(&initResp)
 	assert.NotEmpty(t, initResp["userCode"])
 }
+
+func TestPollEnchantedLink_ExpiredToken_ReturnsCode(t *testing.T) {
+	redis := &mockRedisRepo{data: make(map[string]string)}
+	h := &AuthHandler{
+		RedisService: redis,
+	}
+	app := fiber.New()
+	app.Post("/api/v1/auth/enchanted-link/poll", h.PollEnchantedLink)
+
+	body, _ := json.Marshal(map[string]string{
+		"pendingRef": "missing-ref",
+	})
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/enchanted-link/poll", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	resp, _ := app.Test(req, -1)
+
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+
+	var got map[string]interface{}
+	json.NewDecoder(resp.Body).Decode(&got)
+	assert.Equal(t, "expired_token", got["error"])
+	assert.Equal(t, "expired_token", got["code"])
+}