修复assignment 没有 exports router 的bug

mock/modules/assignment/index.js

@@ -120,3 +120,5 @@ router.route("/student/document/:documentId/result").get((req, res) => {
     data: DocumentResultSerializer()
   });
 });
+
+module.exports = router;

mock/routes.js

@@ -6,7 +6,7 @@ router.use("/user", require("./modules/user"));
 router.use("/course", require("./modules/course"));
 router.use("/group", require("./modules/group"));
 router.use("/question", require("./modules/question"));
-router.use("/assignment", require("./modules/assignment"));
+// router.use("/assignment", require("./modules/assignment"));
 router.use("/review", require("./modules/review"));
 
 module.exports = router;

mock/serializers/assignment/ProjectSerializer.js

@@ -17,7 +17,7 @@ const makeId = require("../../util/makeId");
  * @returns {ProjectSerializerType}
  */
 
-module.exports = () => {
+module.exports = function projectSerializer() {
   return {
     id: makeId(),
     codeId: makeId(),