In this exercise you will create a flight simulator! Don't worry (or don't be too disappointed) there won't be any fancy graphics.

The idea is to let a plane fly over a map and land and start at airports. First this will only happen in the tests (so hey, you can work test-driven!). Then you might want to write a program that let's the plane fly a fixed route. Afterwards you can make this program dynamic through randomization and a simple artificial intelligence. As a last step for this exercise we can build a command line interface to steer an airplane interactively.

Bonus tasks:

• add a multiplayer mode
• display the map with airports and airplanes
• display it in the browser
• create a mulitplayer mode that works ofer the network

;-)

Let's first set up the basics. Read the tasks, then make the tests green one by one. Just fulfill the requirements - and use the same names! The tests are already written, so you just have to make them pass.

Use Ruby 2.1.x or newer and install the latest version with gem install minitest

Read more about it: https://github.com/seattlerb/minitest

• to run one file: ruby -Ilib:test test/map_test.rb
• to run one test: ruby -Ilib:test test/map_test.rb --name test_width_is_set

I also added a Rakefile which enables you to run all the tests at once:

• rake test :-)

• create a Map class with height and width attributes

• create a Airport class with x and y attributes for the position
• add a method position in the Airport class that returns the coordinates

• create an Airplane class with attributes for position (x and y), flying, speed and fuel
• in the setters of speed validate it is between 0 and 10 (do not raise an error)
• add a method accelerate that increments the speed by 2
• add a method slow_down that decrements the speed by 1
• add a method take_off that changes the value of flying to true and accelerates
• add a method touchdown that changes the value of flying to false and calls slow_down