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

Posted by Alexisca hall
Alexisca hall
23,683 Points

Now that we know that we should only have one behavior that we are asserting per test, can you help me break out the ref

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.

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 refundingReturnsAllAvailableFunds() throws Execption {
    creditor creditor =new creditor();
        creditor.addFunds(0);

        int refund = creditor.refund();

        assertEquals(0, 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;
    }

}
Alain De La Cuadra
Alain De La Cuadra
21,890 Points
Alain De La Cuadra
Alain De La Cuadra
21,890 Points

the code i right you misspell creditor creditor = new Creditor();

Creditor creditor = new Creditor();

public void refundingReturnsAllAvailableFunds() throws Execption { creditor creditor =new creditor(); creditor.addFunds(0);

    int refund = creditor.refund();

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

}

and dont forget }