Implement a system for a contactless travel card for the London underground.
- The card does not need to be topped up.
- The card charges the owner's bank account directly when used.
- The card is used by touching in and out at train stations.
- The train system accepting this card has two categorical zones of stations, Zone A and Zone B.
- The stations within the zones are as follows:
| Zone A | Zone B |
|---|---|
| Asterisk | Bison |
| Antelope | Bugel |
| Aldgate | Balham |
| Angel | Bullhead |
| Aardvark | Barbican |
- Travelling within zone B is more expensive than travelling in Zone A.
- The price of zone B is inclusive of travelling within zone A.
| Single | Day | Week | Month | |
|---|---|---|---|---|
| ZoneA | £2.50 | £7.00 | £40.00 | £145.00 |
| ZoneB | £3.00 | £8.00 | £47.00 | £165.50 |
- A Single is a journey from one station to another
- A Day fare includes all single journies made within a single day.
- A Week fare includes all single journies made within a single week.
- A month fare includes all single journies made within a single month.
- If one of the stations is within Zone 2 at any point in a journey, the price for zone 2 will be charged.
- No matter how many journies are made within one of the time boundaries within a particular zone, the price will cap at that time period's fare.
Given Michael has a ClamCard,
And Michael travels from Asterisk to Aldgate,
Michael will be charged £2.50 for his journey.
Given Michael has a ClamCard,
And Michael travels from Asterisk to Barbican,
And Michael travels from Barbican to Balham,
Michael will be charged £3.00 for his first journey
And a further £3.00 for his second journey.
Given Michael has a ClamCard,
And Michael travels from Asterisk To Barbican,
And Michael travels from Barbican to Balham,
And Michael travels from Balham to Bison,
Michael will be charged £3 for his first journey,
And a further £3.00 for his second journey,
And a further £2 for his third journey. (As he will have reached his day cap)
And a further £0.00 for any additional journies within the day
Credit for the original design of this kata to Amir Bazazi
Bonus scenarios here