test: addCourse method in Course class

src/test/java/org/example/CourseTest.java

@@ -107,6 +107,31 @@ class CourseTest {
         deleteTempFile();
     }
 
+    @Test
+    void addCourse() {
+        // Create a new course
+        String courseName = "Math";
+        String courseCode = "C101";
+        int courseCredit = 3;
+
+        // Write course data to the temporary file
+        Course.addCourse(courseName, courseCode, courseCredit, TEMP_FILE);
+
+        // Read course data from the temporary file
+        List<Course> courses = Course.readFromFile(TEMP_FILE);
+
+        // Assert that the course is added successfully
+        assertEquals(1, courses.size());
+        Course addedCourse = courses.get(0);
+        assertEquals(courseName, addedCourse.getCourseName());
+        assertEquals(courseCode, addedCourse.getCourseCode());
+        assertEquals(courseCredit, addedCourse.getCourseCredit());
+
+        // Delete the temporary file
+        deleteTempFile();
+    }
+
+
     /**
      * Creates a temporary file with the provided data.
      *