test : lab1 main testing

1. test all MyClass member functions
2. test all Student member functions
3. coverage of main up to 100%

lab1/main_test.js

@@ -4,20 +4,47 @@ 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();
+
+    assert.strictEqual(myClass.addStudent("variable that is not Student"), -1);
+    assert.strictEqual(myClass.addStudent(student), myClass.students.length-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();
+    myClass.addStudent(student);
+
+    assert.strictEqual(myClass.getStudentById(myClass.students.length), null);
+    assert.strictEqual(myClass.getStudentById(myClass.students.length - 1), student);
+    assert.strictEqual(myClass.getStudentById(0), student);
+    assert.strictEqual(myClass.getStudentById(-1), null);
+
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's setName", () => {
     // TODO
-    throw new Error("Test not implemented");
+    const student = new Student();
+    assert.strictEqual(student.setName(123), undefined);
+
+    // throw new Error("Test not implemented");
 });
 
 test("Test Student's getName", () => {
     // TODO
-    throw new Error("Test not implemented");
-});
+    const student = new Student();
+    student.setName("John");
+    assert.strictEqual(student.getName(), "John");
+
+    const student2 = new Student();
+    student2.setName(123);
+    assert.strictEqual(student2.getName(), '');
+
+    // throw new Error("Test not implemented");
+});
+