diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..71e859ac 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -4,20 +4,46 @@ const { MyClass, Student } = require('./main');
 
 test("Test MyClass's addStudent", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const myClass = new MyClass();
+    //check fail case
+    assert.strictEqual(myClass.addStudent({}), -1);
+    //check success case
+    assert.strictEqual(myClass.addStudent(new Student), 0);
+
 });
 
 test("Test MyClass's getStudentById", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const myClass = new MyClass();
+    assert.strictEqual(myClass.getStudentById(-1), null);
+    assert.strictEqual(myClass.getStudentById(10), null);
+    const names = ['John', 'Jane', 'Doe', 'Smith'];
+    names.forEach(name => {
+        const student = new Student();
+        student.setName(name);
+        const newStudentId = myClass.addStudent(student);
+        const newStudentName = myClass.getStudentById(newStudentId).getName();
+    });
+    assert.strictEqual(myClass.getStudentById(0).getName(), 'John');
+    assert.strictEqual(myClass.getStudentById(1).getName(), 'Jane');
+    assert.strictEqual(myClass.getStudentById(2).getName(), 'Doe');
+    assert.strictEqual(myClass.getStudentById(3).getName(), 'Smith');
 });
 
 test("Test Student's setName", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const student = new Student();
+    student.setName(123);
+    assert.strictEqual(student.getName(), '');
+    student.setName('123');
+    assert.strictEqual(student.getName(), '123');
 });
 
 test("Test Student's getName", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const student = new Student();
+    student.setName(123);
+    assert.strictEqual(student.getName(), '');
+    student.setName('123');
+    assert.strictEqual(student.getName(), '123');
 });
\ No newline at end of file