Added Test to readFromFile Method from Admin Class

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

@@ -2,11 +2,10 @@ package org.example;
 
 import org.junit.jupiter.api.Test;
 
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.PrintStream;
+import java.io.*;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -42,8 +41,29 @@ class AdminTest {
 
         Files.delete(Path.of(filename));
 
+    }
+
+    @Test
+    void readFromFile() throws IOException {
+
+        try (PrintWriter writer = new PrintWriter(new FileWriter("testAdminData.txt"))){
+            writer.println("Thomas");
+            writer.println("A1001");
+            writer.print("Admin");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        String filename = "testAdminData.txt";
+        List<Admin> testAdmins = Admin.readFromFile(filename);
+
+        assertEquals(1, testAdmins.size());
+        Admin admin = testAdmins.get(0);
 
+        assertEquals("Thomas", admin.getName());
+        assertEquals("A1001", admin.getId());
+        assertEquals("Admin", admin.getRole());
 
+        Files.delete(Path.of(filename));
 
     }
 }