unittest: Edited test for QuizCommand

This test tests the random function which gives a random number between 0 and a length back

src/test/java/org/bitbiome/commands/QuizCommandTest.java

@@ -2,6 +2,8 @@ package org.bitbiome.commands;
 
 import org.junit.jupiter.api.Test;
 
+import java.util.Random;
+
 import static org.junit.jupiter.api.Assertions.*;
 
 public class QuizCommandTest {
@@ -21,4 +23,10 @@ public class QuizCommandTest {
         long lastTimePlayed = System.currentTimeMillis();
         assertTrue(QuizCommand.canPlayAgain(lastTimePlayed) < lastTimePlayed);
     }
+
+    @Test
+    public void testRandomNumberGenerator() {
+        int getRandom = QuizCommand.random(3);
+        assertTrue(getRandom >= 0 && getRandom <= 3);
+    }
 }