Test: Added testWriteToFile() to write the professor data into professorData.txt

src/test/java/org/example/ProfessorTest.java

@@ -1,14 +1,38 @@
 package org.example;
 
+import org.example.Professor;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
-
-import java.io.IOException;
+import static org.junit.jupiter.api.Assertions.*;
+import java.io.*;
 import java.util.List;
 
-import static org.junit.Assert.assertEquals;
 
 public class ProfessorTest {
 
+    @BeforeEach
+    void setup() throws IOException {
+        // Ensure the file is clean before each test
+        new PrintWriter("professorData.txt").close();
+    }
+
+    @AfterEach
+    void tearDown() {
+        // Clean up after tests
+        new File("professorData.txt").delete();
+    }
+
+    @Test
+    void testWriteToFile() throws IOException {
+        Professor professor = new Professor("P1001", "John Doe", "Professor");
+        professor.writeToFile();
+
+        // Verify the file contains the expected data
+        try (BufferedReader reader = new BufferedReader(new FileReader("professorData.txt"))) {
+            assertEquals("Professor{professorID='P1001', Name='John Doe', role='Professor'}", reader.readLine());
+        }
+    }
     @Test
     void testReadFromFile() throws IOException {
         Professor professor = new Professor("P1002", "Jane Doe", "Professor");