How to write a test class to test my code?

arraylist, bluej, java

Solution

First you need to decide on the what test cases you need to write for your class , You can use a library like Junit to create test cases once you have the test case list handy.

Here is an example of a few Junit methods

import static org.junit.Assert.assertEquals;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class MyClassTest {

  MyClass tester;

  @BeforeClass
  public static void testSetup() {
    tester = new MyClass();
  }

  @AfterClass
  public static void testCleanup() {
    // Do your cleanup here like close URL connection , releasing resources etc
  }

  @Test(expected = IllegalArgumentException.class)
  public void testExceptionIsThrown() {        
    tester.divide(1000, 0);
  }

  @Test
  public void testMultiply() {
    assertEquals("Result", 50, tester.multiply(10, 5));
  }
}

Problem

I want a test class to test this class but i dont know how to write it and i tried to see online but i still couldnt figure it out.I wrote the code on BlueJ, i'm trying to create the set game. ``` import java.util.*; public class Deck { ArrayList<Card> deck; public Deck () { deck = new ArrayList<Card>(); } public Deck (int capacity) { deck = new ArrayList<Card>(capacity); } public int getNumCards () { return deck.size(); } public boolean isEmpty () { return deck.isEmpty(); } public void add (Card card) { deck.add(0,card); } public Card takeTop() { return deck.remove(0); } public void shuffle () { Collections.shuffle(deck); } public void sort () { Collections.sort(deck); } public String toString () { return (deck.toString()+ "\n"); } } ```

Original source