Self-Test 5

Wed, Nov. 24 2010

Exercise:

Today we will create and test a class to represent a concert, depicted in the following UML class diagram:

Concert

- band : String
- numSeats : int
- numTicketsSold : int
- ticketPrice : double
- totalSales : double

+ setBand(String band) : void
+ setNumSeats(int numSeats) : void
+ setTicketPrice(double ticketPrice) : void
+ getBand() : String
+ getNumSeats() : int
+ getTicketPrice() : double
+ getTicketsSold() : int
+ getTicketsLeft() : int
+ getTotalSales() : double
- okToSell(int numTickets) : boolean
+ sellTickets(int toSell) : void
+ toString() : String
+ equals(Concert otherConcert) : boolean

setBand sets the name of the band
setNumSeats sets the number of seats
setTicketPrice sets the price of a ticket
getBand returns the name of the band
getNumSeats returns the number of seats
getTicketPrice returns the price of a ticket
getTicketsSold returns the number of tickets sold so far
getTicketsLeft returns the number of tickets that can still be sold
getTotalSales returns the euro amount of the tickets sold
okToSell returns true if there are enough tickets left to sell the requested number
sellTickets sells the requested number of tickets if there are enough left
toString should return a String representing the concert (include band, ticket price and tickets left)
equals returns true if this Concert is equal to otherConcert. Two Concerts are equal if all of their instance variables are equal. In the statement concert1.equals(concert2), concert1 is the calling object (this) and concert2 is otherConcert.

Write a stub for each method, like this:

public void setBand(String band)
{
    // stub - replace with code
}

public String getBand()
{
    // stub - replace with code
    return null;
}
Start filling in the method bodies. I have provided some junit tests for you (ConcertTest.java). Compile and test often.
One test has not been implemented (testGetTotalSales2). Write this test so that it buys tickets at different prices (for example 4 tickets at €32.50 and 2 tickets at €27.00), then makes an assertion about the expected sales amount.