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Java Unit Testing in Java How to Test Single Assertions Make For Better Tests

Akash Sharma
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.a{fill-rule:evenodd;}techdegree
Akash Sharma
Full Stack JavaScript Techdegree Student 14,147 Points

Whats the test method of refundingResetsAvailableFundsToZero()

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com/teamtreehouse/vending/CreditorTest.java
package com.teamtreehouse.vending;

import org.junit.Test;

import static org.junit.Assert.*;

public class CreditorTest {

    @Test
    public void addingFundsIncrementsAvailableFunds() throws Exception {
        Creditor creditor = new Creditor();

        creditor.addFunds(25);
        creditor.addFunds(25);

        assertEquals(50, creditor.getAvailableFunds());
    }

    @Test
    public void refundingReturnsAllAvailableFunds() throws Exception {
        Creditor creditor = new Creditor();
        creditor.addFunds(10);

        int refund = creditor.refund();

        assertEquals(10, refund);

    }
  @Test
    public void refundingResetsAvailableFundsToZero() throws Exception {
      assertEquals(0, creditor.getAvailableFunds());
}
com/teamtreehouse/vending/Creditor.java
package com.teamtreehouse.vending;

public class Creditor {
    private int funds;

    public Creditor() {
        funds = 0;
    }

    public void addFunds(int money) {
        funds += money;
    }

    public void deduct(int money) throws NotEnoughFundsException {
        if (money > funds) {
            throw new NotEnoughFundsException();
        }
        funds -= money;
    }

    public int refund() {
        int refund = funds;
        funds = 0;
        return refund;
    }

    public int getAvailableFunds() {
        return funds;
    }

}

2 Answers

Seth Kroger
Seth Kroger
56,392 Points

You need to create a new creditor in your test, then add any amount of funds, then refund it. Then you can test the assertion. You also need to close the curly brace on your test method.

Can you show me that in code mode?