test: Added testViewGradesFromStudent Function

src/test/java/org/example/AdministrationTest.java

@@ -1,7 +1,11 @@
 package org.example;
 
+import junit.framework.JUnit4TestCaseFacade;
 import org.junit.jupiter.api.Test;
-
+import  java.io.InputStream;
+import  java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
 import java.util.List;
 import java.util.Map;
 
@@ -123,7 +127,7 @@ class AdministrationTest {
         assertFalse(nonExistingAdminDeleted);
     }
 
-@org.junit.jupiter.api.Test
+@Test
 
     void testFindStudentById(){
         Student student = new Student("Mark", "S1001", "Student");
@@ -447,4 +451,51 @@ class AdministrationTest {
 
         assertTrue(correct);
     }
+
+    @Test
+    void testViewGradesFromStudent() {
+        Administration administration = new Administration();
+
+        Course course = sampleCourse;
+        administration.addCourse(course);
+
+        Student stud = sampleStudent;
+        administration.addStudents(stud);
+
+        administration.enrollStudentInCourse(stud.getStudentId(), course.getCourseID());
+        stud.assignGrade(course,"12");
+
+
+        String studentId = stud.getStudentId() ;
+
+        Student student = administration.findStudentById(studentId) ;
+
+        String printedOutput = null;
+
+        if (student != null) {
+
+            // Redirect System.out to capture printed output
+            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+            System.setOut(new PrintStream(outputStream));
+
+            // Call the method under test
+            student.printGrades();
+
+            // Get the printed output
+            printedOutput = outputStream.toString().trim();
+
+
+        } else {
+            System.out.println("Student with ID " + studentId + " not found.");
+        }
+
+
+
+        assertEquals("Grades for Student ID: " + student.getStudentId() + ", Name: "+ student.getStudentName() + "\r\nCourse: Math (M101), Grade: 12", printedOutput);
+
+
+    }
+
+
 }
+