Added Test for dropStudentFromCourse method to AdministrationTest class

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

@@ -3,6 +3,7 @@ package org.example;
 import org.junit.jupiter.api.Test;
 
 import java.util.List;
+import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -418,4 +419,22 @@ class AdministrationTest {
         assertEquals("Student",administration.findStudentById("S1010").getStudentRole());
 
     }
+    @Test
+    void dropStudentFromCourse() {
+        Student student = sampleStudent;
+        Course course = sampleCourse;
+        admin.addStudents(student);
+        admin.addCourse(course);
+
+        Map<Course, String> studentCourses = student.getCourseGrades();
+        studentCourses.put(course, "Not Graded");
+        student.setCourseGrades(studentCourses);
+
+        assertEquals(1, student.courseGrades.size());
+
+        admin.dropStudentFromCourse("S123456", "M101");
+
+        assertEquals(0, student.courseGrades.size());
+
+    }
 }