diff --git a/lab1/README.md b/lab1/README.md
index 5b2779a5..df0ab9f5 100644
--- a/lab1/README.md
+++ b/lab1/README.md
@@ -2,7 +2,7 @@
 
 ## Introduction
 
-In this lab, you will write unit tests for functions implemented in `main.js`. You can learn how to use classes and functions in it by uncommenting the code in `main.js.` (But remember don't commit them on GitHub)
+In this lab, you will write unit tests for functions implemented in `main.js`. You can learn how to use classes and functions in it by uncommenting the code in it. (But remember don't commit them on GitHub)
 
 ## Requirement
 
diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..1b0c85d9 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -2,22 +2,44 @@ 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");
-});
-
+test("Test MyClass's addStudent", ()=>{
+    // TODO  
+    	const student = new Student();
+	const myClass = new MyClass();    
+        student.setName("John");
+        const newStudentId = myClass.addStudent(student);
+        assert.strictEqual(newStudentId, 0,"正確");
+        const notstudentID=111;
+        const newStudentId2 = myClass.addStudent(notstudentID);
+        assert.strictEqual(newStudentId2,-1,"錯誤");
+       
+}); 
 test("Test MyClass's getStudentById", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    // TODO 
+    const student = new Student();
+    const myClass = new MyClass();  
+    student.setName("kevin");
+    myClass.addStudent(student);
+    const newStudentName = myClass.getStudentById(0);
+    assert.strictEqual(newStudentName.getName(), "kevin","正確");
+    const newStudentName2 = myClass.getStudentById(-1);
+    assert.strictEqual(newStudentName2, null,"錯誤");
+   
 });
-
 test("Test Student's setName", () => {
     // TODO
-    throw new Error("Test not implemented");
+        const student = new Student();
+        student.setName("John");
+        assert.strictEqual(student.getName(), "John","正確");
+        student.setName(111);
+        assert.strictEqual(student.getName(),"John","錯誤");    
+   
 });
-
 test("Test Student's getName", () => {
     // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+       const student = new Student();
+       assert.strictEqual(student.getName(),'',"錯誤");
+    student.setName("John");    
+    assert.strictEqual(student.getName(), "John","正確");
+    
+});