Made changes to UserDatabase. Added some Tests, need to resolve some issues

Author: Madhavan7

src/main/java/UserDatabase.java

@@ -3,10 +3,13 @@
 import java.io.PrintWriter;
 import java.util.Scanner;
 public class UserDatabase implements UserExists, UserCreator{
+    File accounts;
+    public UserDatabase(File accounts){
+        this.accounts = accounts;
+    }
     @Override
     public boolean UserExists(String username, String email) {
-        File accounts = new File("UserAccounts.csv");
-        try(Scanner x = new Scanner(accounts)){
+        try(Scanner x = new Scanner(this.accounts)){
             x.useDelimiter("\n");
             while(x.hasNext()) {
                 String[] y = x.next().split(",");
@@ -25,8 +28,7 @@ public boolean UserExists(String username, String email) {
     //
     @Override
     public void createUser(String username, String password, String email) {
-            File accounts = new File("UserAccounts.csv");
-            try(PrintWriter out = new PrintWriter(accounts)){
+            try(PrintWriter out = new PrintWriter(this.accounts)){
                 out.println(username + "," + password + "," + email + "," + "no" + "," + "offline");
                 out.flush();
             }catch (FileNotFoundException e){

src/test/java/TestUserDatabase.csv

@@ -0,0 +1,33 @@
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+
+public class UserDatabaseTest {
+    @Test
+    public void addingFilesRightEmailAndUser(){
+        File accounts = new File("TestUserDatabase.csv");
+        UserDatabase accountDatabase = new UserDatabase(accounts);
+        accountDatabase.createUser("MadhavGopakumar", "123", "[email protected]");
+        Assertions.assertTrue(accountDatabase.UserExists("MadhavGopakumar", "[email protected]"));
+    }
+    @Test
+    public void addingMultipleFiles(){
+        File accounts = new File("TestUserDatabase.csv");
+        UserDatabase accountDatabase = new UserDatabase(accounts);
+        accountDatabase.createUser("MeenakshiGopakumar", "123", "[email protected]");
+        Assertions.assertTrue(accountDatabase.UserExists("MeenakshiGopakumar", "[email protected]"));
+    }
+    @Test
+    public void rightEmailWrongUser(){
+        File accounts = new File("TestUserDatabase.csv");
+        UserDatabase accountDatabase = new UserDatabase(accounts);
+        Assertions.assertTrue(accountDatabase.UserExists("MadG", "[email protected]"));
+    }
+    @Test
+    public void rightUserWrongEmail(){
+        File accounts = new File("TestUserDatabase.csv");
+        UserDatabase accountDatabase = new UserDatabase(accounts);
+        Assertions.assertTrue(accountDatabase.UserExists("MeenakshiGopakumar", "ma"));
+    }
+}