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https://github.com/samelamin/oysterkata


https://github.com/samelamin/oysterkata

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README 

        
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

          Asterisk

          Antelope

          Aldgate

          Angel

        -- Zone B

          Bison

          Bugel

          Balham

          Bullhead

          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.

* The fares are as described below:

                        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.



SCENARIOS:



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



More scenarios to come..



BONUS EXERCISE: 



Take into account for return journies, the new fares are as described below:

                        Single  Return  Day     Week    Month

                ZoneA   £2.50   £4.50   £8.50   £38     £120

                ZoneB   £3      £5.50   £9.50   £47     £152    

        -- A Single is a journey from one station to another 

        -- A Return is a single journey where the next immediate journey is the inverse of the previous journey. 

           Travelling from station A to station B, then from Station B to station A, classifies as a return.

        -- A Day fare includes all single and return journies made within a single day.

        -- A Week fare includes all single and return journies made within a single week.

        -- A month fare includes all single and return journies made within a single month.

        

        

Given Michael has a ClamCard 

And Michael travels from Asterisk to Barbican,

And Michael travels from Barbican to Asterisk within the same day,

And Michael travels from Asterisk to Balham within the same day,

And Michael travels from Balham to Asterisk within the same day,

Michael will be charged £3 after his first journey,

And a further £2.50 for his second journey,

And a further £3.00 for his third journey,

And a further £1.00 for his final journey.