Clam Card
Implement a system for a contactless travel card for subways.
- 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.
| Zone A | Zone B |
|---|---|
| Asterisk | Bison |
| Amersham | Bugel |
| Aldgate | Balham |
| Angel | Bullhead |
| Anerley | Barbican |
- Traveling within zone B is more expensive than traveling in Zone A.
- The price of zone B is inclusive of traveling within zone A.
- If one of the stations is within Zone 2 at any point in a journey, the price for zone 2 will be charged.
The fares are as described below:
| Zone | Single | Day | Week | Month |
|---|---|---|---|---|
| Zone A | $2.50 | $7.00 | $40.00 | $145.00 |
| Zone B | $3.00 | $8.00 | $47.00 | $165.00 |
- A Single is a journey from one station to another.
- A Day fare includes all single journeys made within a single day.
- A Week fare includes all single journeys made within a single week.
- A Month fare includes all single journeys made within a single month.
- No matter how many journeys are made within one of the time boundaries within a particular zone, the price will cap at that time period's fare.
Scenarios
Follow these scenarios driving out our code as you go.
One-Way Zone 1 Journey
Given Michael has a Clam Card
And Michael travels from Asterisk to Aldgate
Then Michael will be charged $2.50 for his first journey
One-Way Zone 1 to Zone 2 Journey
Given Michael has a Clam Card
And Michael travels from Asterisk to Barbican
Then Michael will be charged $3.0 for his first journey
Multiple journeys
Given Michael has a Clam Card
And Michael travels from Asterisk to Aldgate
And Michael travels from Asterisk to Balham
Then Michael will be charged $2.50 for his first journey
And a further $3.00 for his second journey.
Totaling $5.50
Multiple Journeys including Zone B reaching daily cap
Given Michael has a Clam Card
And Michael travels from Asterisk to Barbican
And Michael travels from Barbican to Balham
And Michael travels from Balham to Bison
And Michael travels from Bison to Asterisk
Then Michael will be charged $3.00 for his first journey
And a further $3.00 for his second journey
And a further $2 for his third journey
And a further $0.00 for his fourth journey
Multiple Journeys Zone A reaching daily cap
Given Michael has a Clam Card
And Michael travels from Asterisk to Aldgate
And Michael travels from Aldgate to Angel
And Michael travels from Angel to Antelope
And Michael travels from Antelope to Asterisk
Then Michael will be charged $2.50 for his first journey
And a further $2.50 for his second journey
And a further $2 for his third journey
And a further $0.00 for his fourth journey
Bonus
Take into account for return journeys, the new fares are as described below:
| Zone | Single Return |
|---|---|
| Zone A | $2.00 |
| Zone B | $2.50 |
- 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.
- Traveling from station A to station B, then from Station B to station A, classifies as a return.
- A Day fare still includes all single and return journeys made within a single day.
- A Week fare still includes all single and return journeys made within a single week.
- A month fare still includes all single and return journeys made within a single month.
Multiple Return Journeys
And Michael travels from Asterisk to Barbican
And Michael travels from Barbican to Asterisk
And Michael travels from Asterisk to Balham
And Michael travels from Balham to Asterisk
Then Michael will be charged $3.00 for his first journey
And a further $2.50 for his second journey
And a further $1.50 for his third journey
And a further $0.00 for his fourth journey