diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..2b1fd0f6 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -1,23 +1,96 @@
-const test = require('node:test');
-const assert = require('assert');
-const { MyClass, Student } = require('./main');
+const test = require("node:test");
+const assert = require("assert");
+const { MyClass, Student } = require("./main");
 
 test("Test MyClass's addStudent", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    
+    const testClass = new MyClass();
+
+    // invalid student
+    const inv_stu = [-1, 0, 100, "QAQ", 3.14];
+    for(let i = 0; i < inv_stu.length; i++) {
+        assert.strictEqual(testClass.addStudent(inv_stu[i]), -1);
+    }
+
+    // valid student
+    const names = ["John", "Jane", "Doe", "Smith"];
+    stuList = [];
+    for(let i = 0; i < names.length; i++) {
+        stuTmp = new Student();
+        stuTmp.setName(names[i]);
+        stuList.push(stuTmp);
+    }
+    for(let i = 0; i < stuList.length; i++) {
+        assert.strictEqual(testClass.addStudent(stuList[i]), i);
+    }
+
 });
 
 test("Test MyClass's getStudentById", () => {
-    // TODO
-    throw new Error("Test not implemented");
+
+    const testClass = new MyClass();
+    const names = ["John", "Jane", "Doe", "Smith"];
+    stuList = [];
+    for(let i = 0; i < names.length; i++) {
+        stuTmp = new Student();
+        stuTmp.setName(names[i]);
+        stuList.push(stuTmp);
+    }
+    for(let i = 0; i < stuList.length; i++) {
+        testClass.addStudent(stuList[i]);
+    }
+
+    // invalid id
+    const inv_id = [-1, stuList.length, stuList.length + 1];
+    for(let i = 0; i < inv_id.length; i++) {
+        assert.strictEqual(testClass.getStudentById(inv_id[i]), null);
+    }
+
+    // valid id
+    for(let i = 0; i < stuList.length; i++) {
+        console.log(testClass.getStudentById(i));
+        assert.strictEqual(testClass.getStudentById(i), stuList[i]);
+    }
+
+
 });
 
 test("Test Student's setName", () => {
-    // TODO
-    throw new Error("Test not implemented");
+
+    // invalid username
+    const inv_names = [-1, 0, 100, 1234]
+    for(let i = 0; i < inv_names.length; i++) {
+        stuTmp = new Student();
+        assert.strictEqual(stuTmp.setName(inv_names[i]), undefined);
+        assert.strictEqual(stuTmp.getName(), "");
+    }
+
+    // valid username
+    const v_names = ["John", "Jane", "Doe", "Smith"];
+    for(let i = 0; i < v_names.length; i++) {
+        stuTmp = new Student();
+        assert.strictEqual(stuTmp.setName(v_names[i]), undefined);
+        assert.strictEqual(stuTmp.getName(), v_names[i]);
+    }
+
 });
 
 test("Test Student's getName", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+
+    // invalid username
+    const inv_names = [-1, 0, 100, 1234]
+    for(let i = 0; i < inv_names.length; i++) {
+        stuTmp = new Student();
+        assert.strictEqual(stuTmp.setName(inv_names[i]), undefined);
+        assert.strictEqual(stuTmp.getName(), "");
+    }
+
+    // valid username
+    const v_names = ["John", "Jane", "Doe", "Smith"];
+    for(let i = 0; i < v_names.length; i++) {
+        stuTmp = new Student();
+        assert.strictEqual(stuTmp.setName(v_names[i]), undefined);
+        assert.strictEqual(stuTmp.getName(), v_names[i]);
+    }
+    
+});