refactoring: Added automatic creation/deletions of test.tx in AdminTest

src/test/java/org/example/AdminTest.java

@@ -1,5 +1,7 @@
 package org.example;
 
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import java.io.*;
@@ -10,6 +12,23 @@ import java.util.List;
 import static org.junit.jupiter.api.Assertions.*;
 
 class AdminTest {
+    @BeforeEach
+    void setup() throws IOException {
+        // Ensure the file is clean before each test
+        new PrintWriter(fileName()).close();
+    }
+    @AfterEach
+    void tearDown() {
+        // Clean up after tests
+        new File(fileName()).delete();
+    }
+
+    public String fileName()
+    {
+        String filename = "testAdminData.txt";
+        return filename;
+    }
+
     //Tests printAdminInfo Method
     @org.junit.jupiter.api.Test
     void printAdminInfo() {
@@ -31,17 +50,13 @@ class AdminTest {
     @Test
     void writeToFile() throws IOException {
         Admin admin = new Admin("Simon", "A1001", "Admin") ;
+        
+        admin.writeToFile(admin, fileName());
 
-        String filename = "testAdminData.txt";
-
-        admin.writeToFile(admin, filename);
-
-        Path path = Path.of(filename);
+        Path path = Path.of(fileName());
         String content = Files.readString(path);
         assertEquals("Simon\nA1001\nAdmin", content);
 
-        Files.delete(path);
-
     }
     //Tests readFromFile Method
     @Test
@@ -54,8 +69,8 @@ class AdminTest {
         } catch (IOException e) {
             e.printStackTrace();
         }
-        String filename = "testAdminData.txt";
-        List<Admin> testAdmins = Admin.readFromFile(filename);
+
+        List<Admin> testAdmins = Admin.readFromFile(fileName());
 
         assertEquals(1, testAdmins.size());
         Admin admin = testAdmins.get(0);
@@ -64,7 +79,5 @@ class AdminTest {
         assertEquals("A1001", admin.getId());
         assertEquals("Admin", admin.getRole());
 
-        Files.delete(Path.of(filename));
-
     }
 }