lawitsag / cinema-tickets-javascript

Cinema Tickets Service

Objective

This is a coding exercise which demonstrates coding skills and approach to a given problem. The code is assessed on the ability to write clean, well-tested, and reusable code, and how it ensures the following business rules are correctly met.

Business Rules

• There are 3 types of tickets: Infant, Child, and Adult.
• The ticket prices are based on the type of ticket.
• The ticket purchaser declares how many and what type of tickets they want to buy.
• Multiple tickets can be purchased at any given time.
• Only a maximum of 20 tickets can be purchased at a time.
• Infants do not pay for a ticket and are not allocated a seat. They will be sitting on an Adult's lap.
• Child and Infant tickets cannot be purchased without purchasing an Adult ticket.

Ticket Type	Price
INFANT	£0
CHILD	£10
ADULT	£20

• There is an existing TicketPaymentService responsible for taking payments.
• There is an existing SeatReservationService responsible for reserving seats.

Constraints

• The TicketService interface CANNOT be modified. (For Java solution only)
• The code in the thirdparty.* packages CANNOT be modified.
• The TicketTypeRequest SHOULD be an immutable object.

Assumptions

You can assume:

• All accounts with an id greater than zero are valid. They also have sufficient funds to pay for any number of tickets.
• The TicketPaymentService implementation is an external provider with no defects. You do not need to worry about how the actual payment happens.
• The payment will always go through once a payment request has been made to the TicketPaymentService.
• The SeatReservationService implementation is an external provider with no defects. You do not need to worry about how the seat reservation algorithm works.
• The seat will always be reserved once a reservation request has been made to the SeatReservationService.

Task

Provide a working implementation of a TicketService that:

• Considers the above objective, business rules, constraints & assumptions.
• Calculates the correct amount for the requested tickets and makes a payment request to the TicketPaymentService.
• Calculates the correct number of seats to reserve and makes a seat reservation request to the SeatReservationService.
• Rejects any invalid ticket purchase requests. It is up to you to identify what should be deemed as an invalid purchase request.

Installation

1.Clone the repository:git clone https://github.com/lawitsag/cinema-tickets-javascript.git 2. Navigate to the project directory: cd cinema-tickets-javascript 3. Install dependencies: npm install 4. Install Babel and the Babel preset for Jest:npm install --save-dev babel-jest @babel/core @babel/preset-env 5. Create a .babelrc file in your project root and add the following configuration:{ "presets": ["@babel/preset-env"] }

Testing

To run tests, use the following command: npm test

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

License

MIT