diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..d41a1f55 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -2,22 +2,47 @@ const test = require('node:test');
 const assert = require('assert');
 const { MyClass, Student } = require('./main');
 
+
 test("Test MyClass's addStudent", () => {
+    const myClass = new MyClass();
+    const student = new Student();
+    student.setName("Michael");
+    assert.strictEqual(myClass.addStudent(student), 0);
+    assert.strictEqual(myClass.addStudent("student"), -1);
     // TODO
-    throw new Error("Test not implemented");
+    // throw new Error("Test not implemented");
 });
 
 test("Test MyClass's getStudentById", () => {
+    const myClass = new MyClass();
+    const student = new Student();
+    student.setName("Lucy");
+
+    assert.strictEqual(myClass.addStudent(student), 0);
+    assert.strictEqual(myClass.getStudentById(0), myClass.students[0]);
+    assert.ifError(myClass.getStudentById(1));
+    assert.ifError(myClass.getStudentById(-3));
     // TODO
-    throw new Error("Test not implemented");
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's setName", () => {
+    const student = new Student();
+    student.setName("Meow");
+    assert.strictEqual(student.name,"Meow");
+    const student1 = new Student();
+    student1.setName(123456789);
+    assert.strictEqual(student1.name,undefined);
     // TODO
-    throw new Error("Test not implemented");
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's getName", () => {
+    const student = new Student();
+    student.setName("Lucy");
+    assert.strictEqual(student.getName(),"Lucy");
+    const student1 = new Student();
+    assert.strictEqual(student1.getName(),"");
     // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+    // throw new Error("Test not implemented");
+});