diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b..0ce0e0a 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -4,20 +4,51 @@ const { MyClass, Student } = require('./main');
 
 test("Test MyClass's addStudent", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const myClass = new MyClass();
+    const student = new Student();
+
+    const studentId = myClass.addStudent(student);
+    // const name = ['John'];
+    assert.strictEqual(studentId, 0);
+
+    assert.strictEqual(myClass.addStudent({}), -1);
+    // throw new Error("Test not implemented");
 });
 
 test("Test MyClass's getStudentById", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const myClass = new MyClass();
+    const student = new Student();
+    student.setName("John");
+    const studentId = myClass.addStudent(student);
+    
+    const retrievedStudent = myClass.getStudentById(studentId);
+    assert.strictEqual(retrievedStudent, student);
+    
+    assert.strictEqual(myClass.getStudentById(-1), null);
+    assert.strictEqual(myClass.getStudentById(100), null);
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's setName", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const student = new Student();
+    
+    student.setName("Alice");
+    assert.strictEqual(student.getName(), "Alice");
+    
+    student.setName(123);
+    assert.strictEqual(student.getName(), "Alice"); 
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's getName", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const student = new Student();
+    
+    assert.strictEqual(student.getName(), "");
+    
+    student.setName("Bob");
+    assert.strictEqual(student.getName(), "Bob");
+    // throw new Error("Test not implemented");
 });
\ No newline at end of file