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Start your free trialRustambek Zokirov
4,308 PointsHow can I solve this challenge?
I am experiencing difficulty solving this challenge.
package com.teamtreehouse.vending;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
public class CreditorTest {
private Creditor creditor;
@Before
public void setUp() throws Exception {
creditor = new Creditor();
}
@Test
public void addingFundsIncrementsAvailableFunds() throws Exception {
creditor.addFunds(25);
creditor.addFunds(25);
assertEquals(50, creditor.getAvailableFunds());
}
@Test
public void refundingReturnsAllAvailableFunds() throws Exception {
creditor.addFunds(10);
int refund = creditor.refund();
assertEquals(10, refund);
}
@Test
public void refundingResetsAvailableFundsToZero() throws Exception {
creditor.addFunds(10);
creditor.refund();
assertEquals(0, creditor.getAvailableFunds());
}
}
@Test (expected = NotEnoughFundsException.parameter)
public class NotEnoughFundsException extends Exception
creditor.getAvailableFunds ("DEDUCT")
}
}
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;
}
}
package com.teamtreehouse.vending;
public class NotEnoughFundsException extends Exception {
}
2 Answers
Mihai Craciun
13,520 PointsThere are many problems with your code
1st: your method is not included in the CreditorTest class. Be careful where you place parentheses. I've commented below where the mistakes are:
com/teamtreehouse/vending/CreditorTest.java
package com.teamtreehouse.vending;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
public class CreditorTest {
private Creditor creditor;
@Before
public void setUp() throws Exception {
creditor = new Creditor();
}
@Test
public void addingFundsIncrementsAvailableFunds() throws Exception {
creditor.addFunds(25);
creditor.addFunds(25);
assertEquals(50, creditor.getAvailableFunds());
}
@Test
public void refundingReturnsAllAvailableFunds() throws Exception {
creditor.addFunds(10);
int refund = creditor.refund();
assertEquals(10, refund);
}
@Test
public void refundingResetsAvailableFundsToZero() throws Exception {
creditor.addFunds(10);
creditor.refund();
assertEquals(0, creditor.getAvailableFunds());
}
}
//^ Here is where your class ends so you should add the method inside this
@Test (expected = NotEnoughFundsException.parameter)
public class NotEnoughFundsException extends Exception
//***************************************************** ^^^you didn't open the parenthesis
creditor.getAvailableFunds ("DEDUCT")
}
}
//^ this parenthesis is extra
2nd: Ok now about your Test method. The task ask you to write a happy path test for deduct method so it will expect a NotEnoughFundsException. So what you have to do is deduct from creditor more money that is already inside. For that you have to add some credit first with .addFunds(int) method and then try to deduct more than you've added. The result should look like this
@Test(expected = NotEnoughFundsException.class)
public void notEnoughFunds() throws Exception{
creditor.addFunds(25);
creditor.deduct(50);
}
Rustambek Zokirov
4,308 PointsThanks a lot for the explanation. It helped me.