test: deleteCourse method in Administration class

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

@@ -79,4 +79,19 @@ class AdministrationTest {
         admin.addCourse(course);
         assertEquals(course, admin.findCourseByID("M101"));
     }
+
+    @Test
+    public void testDeleteCourse() {
+        Administration administration = new Administration();
+        // Adding a course
+        Course course = new Course("Math", "M101", 4);
+        administration.addCourse(course);
+
+        // Deleting the course
+        assertTrue(administration.deleteCourse("M101"));
+
+        // Checking if the course is no longer found
+        assertNull(administration.findCourseByID("M101"));
+    }
+
 }