joelpittet / phpinterview

PHP Interview Exercise

PHP Interview Kata

Code Kata is a term coined by Dave Thomas, co-author of the book The Pragmatic Programmer, in a bow to the Japanese concept of kata in martial arts. A code kata is an exercise in programming which helps a programmer hone their skills through practice and repetition. As of October 2011, Dave Thomas has published 21 different katas.

You can find others to start practicing here.

When you do programming katas, you use TDD. That's why I have included PHPUnit as a dependency.

Exercise: Movie Tickets

Adaptation of codingkata.org's Movie Ticket problem

Description

The computers - if you can call those DOS slaves so - all went down. Worst case scenario. As you are the only clerk who can multiply you are now in charge of handling all ticket sales! Seize the opportunity!

Basic admission rates (regular weekday, 2D movie, <=120 min, parquet)

General admission                               $11.00
Students                                        $8.00
Senior Citizens (65 & older)                    $6.00
Children (under 13)                             $5.50
Group (20 people or more)                       $6.00 each

Exceptions

3D movie                                        +$3.00
Over-length (more than 120 min.)                +$1.50
Movie Day (Thurdsday, except for groups!)       -$2.00
Weekends                                        +$1.50
Loge                                            +$2.00

Customer satisfaction is important, so always charge the lowest price possible!

To solve this exercise, implement the interface provided within src/Kata/Movie.php after you checked out the project code.

Execute tests

1. Add your code to 'src/Kata/Movie.php' until tests pass, using pricing rules from above exercise notes.

2. Run 'php ./vendor/bin/phpunit' from your command line to run your tests.

   php vendor/bin/phpunit
   

3. To start it should look like this

   

4. And to finish it will look like this: