Boris Bikes

Transport for London, the body responsible for delivery of a new bike system, come to you with a plan: a network of docking stations and bikes that anyone can use. They want you to build a program that will emulate all the docking stations, bikes, and infrastructure (repair staff, and so on) required to make their dream a reality.

To help structure your work, here are 22 challenges. They all build on one another. They require you to research things, to get stuck, and to find your own solutions. This is on purpose. A developer is a 'knowledge worker' - someone who will spend the majority of their time researching and learning how to solve problems. It'll suck for a bit, but with practice, you will get faster: and there's no better feeling than finding the answer to a problem that's been standing in your way for hours.

User Stories

1
As a person,
So that I can use a bike,
I'd like a docking station to release a bike.

2
As a person,
So that I can use a good bike,
I'd like to see if a bike is working

3
As a member of the public
So I can return bikes I've hired
I want to dock my bike at the docking station

4
As a member of the public
So I can decide whether to use the docking station
I want to see a bike that has been docked

5
As a member of the public,
So that I am not confused and charged unnecessarily,
I'd like docking stations not to release bikes when
there are none available

6
As a maintainer of the system,
So that I can control the distribution of bikes,
I'd like docking stations not to accept more bikes
than their capacity

7
As a system maintainer,
So that I can plan the distribution of bikes,
I want a docking station to have a default capacity of 20 bikes

Objects and Messages Interaction

1

Object	Message
person
bike
docking_station	releases_a_bike

2

Object	Message
person
bike	is_bike_working?

3

Object	Message
member_of_public
bike	hire_a_bike
docking_station	(return) dock_a_bike

4

Object	Message
member_of_public
	decide
docking_station	use_docking_station
bike	dock_bike

5

Object	Message
member_of_public	not_getting_confused being_charged_unnecessarily?
docking_station	does_not_release_a_bike (Exception)
bike	bike_available?

Diagram