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

Claire Uzenski
Claire Uzenski
1,026 Points

Need help with java script

Now that we know that we should only have one behavior that we are asserting per test, can you help me break out the refundingReturnsAllAvailableFunds test case into a new one?

How about making a new test that does the same, Arrange, Act and Assert named refundingResetsAvailableFundsToZero that separates out that final assertion in the first test.

I don't understand what I'm supposed to do with this

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);
        assertEquals(0, creditor.getAvailableFunds());
    }

    @Test
     public void refundingResetsAvailableFundsToZero() throws Exception { //<----new method
        Creditor creditor = new Creditor();
        creditor.addFunds(10);

        int refund = creditor.refund();

        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;
    }

}
Claire Uzenski
Claire Uzenski
1,026 Points

I still can not figure it out, I don't even know where I'm supposed to put the code