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                                           Background                                                 

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| MobilePay is a mobile payments solution which can be used to send money to your friends or buy goods from | merchants. Each merchant needs to pay various fees to payment service providers in order to make
| customers lives easier by paying with card or phone. Even tough MobilePay is one of the top choices as
| payment service providers for merchants, it doesn't come for free. MobilePay has various rules to
| calculate the fee that we should charge each merchant for using MobilePay. So far we are doing this
| manually by using data from databases and lot's of excel spreadsheets and macros, then we use calculated
| fees to make an invoice which we send to a merchant.
|
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                                              Task                                                     

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| You have been assigned to help our collegues and remove all those manual error prone calculations from
| them by introducing a tool which will do that automatically. Our Product Owner and Tech Lead has created
| an epic. It was broke down into user stories which needs to be delivered by you. You will be assesed by
| all business/technical requirements listed in the epic, quality over delivery time is expected.
|
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                                         Epic MOBILEPAY-1                                              

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| As a MobilePay accountant I want to have an app which will calculate merchant fees so that we would avoid | manual calculation
|
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| Business requirements:
| - App should calculate fees per transaction
| - App should take transactions from the file named transactions.txt with the following format:
| Date merchantName amount
| - transactions.txt will always contain transactions ordered by date ASC
| - App should output result to console with the following format:
| Date merchantName fee
| - Fee amount should be formatted like this 25.00
| - Date should be formatted like this YYYY-MM-DD
|
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| Technical requirements:
| - App should be written as Console application in C# (.NET Framework or .NET Core)
| - Usage of external libraries are prohibited (except tests)
| - Output should be written to console
| - Ubiqutous language should be used in the solution -
| https://www.agilealliance.org/glossary/ubiquitous-language
| - Documentation is optional, if there is a need - put in README.md file
| - Source code should be pushed to a publicly available git repository (GitHub, GitLab, Bitbucket, ...)
| - Code should be flexible enough to change, add or remove rules
| - Code should be covered with tests | - Clean code principles should be applied | - App should output transaction fee as soon as it processes transaction (app should not load all | transactions to memory)
|
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| Stories in Epic:
| MOBILEPAY-2
| MOBILEPAY-3
| MOBILEPAY-4
| MOBILEPAY-5
|
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                                       User Story MOBILEPAY-2                                          

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| As a MobilePay accountant I want merchants to be charged Transaction Percentage Fee (1% of transaction
| amount), so that MobilePay would still be cheapest solution in the market and we could earn enough money | to cover our expenses
|
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| Acceptance criteria:
|
| Given that 120 DKK transaction is made to CIRCLE_K on 2018-09-02
| And 200 DKK transaction is made to TELIA on 2018-09-04
| And 300 DKK transaction is made to CIRCLE_K on 2018-10-22
| And 150 DKK transaction is made to CIRCLE_K on 2018-10-29
| When fees calculation app is executed
| Then the output is:
| 2018-09-02 CIRCLE_K 1.20
| 2018-09-04 TELIA 2.00
| 2018-10-22 CIRCLE_K 3.00
| 2018-10-29 CIRCLE_K 1.50
|
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                                       User Story MOBILEPAY-3                                          

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| As a MobilePay accountant I want TELIA merchant to get Transaction Fee Percentage Discount (10% discount
| for transaction), so that MobilePay would be more attractive to big merchants
|
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| Acceptance criteria:
| Given that 120 DKK transaction is made to TELIA on 2018-09-02
| And 200 DKK transaction is made to TELIA on 2018-09-04
| And 300 DKK transaction is made to TELIA on 2018-10-22
| And 150 DKK transaction is made to TELIA on 2018-10-29
| When fees calculation app is executed
| Then the output is:
| 2018-09-02 TELIA 1.08
| 2018-09-04 TELIA 1.80
| 2018-10-22 TELIA 2.70
| 2018-10-29 TELIA 1.35
|
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                                       User Story MOBILEPAY-4                                          

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| As a MobilePay accountant I want CIRCLE_K merchant to get Transaction Fee Percentage Discount (20%
| discount for transaction), so that MobilePay would be more attractive to big merchants
|
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| Acceptance criteria:
| Given that 120 DKK transaction is made to CIRCLE_K on 2018-09-02
| And 200 DKK transaction is made to CIRCLE_K on 2018-09-04
| And 300 DKK transaction is made to CIRCLE_K on 2018-10-22
| And 150 DKK transaction is made to CIRCLE_K on 2018-10-29
| When fees calculation app is executed
| Then the output is:
| 2018-09-02 CIRCLE_K 0.96
| 2018-09-04 CIRCLE_K 1.60
| 2018-10-22 CIRCLE_K 2.40
| 2018-10-29 CIRCLE_K 1.20
|
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                                       User Story MOBILEPAY-5                                          

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|As a MobilePay accountant I want to charge merchants Invoice Fixed Fee (29 DKK) every month, so that we
|could cover our expenses for sending physical invoices to merchants
|
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|Requirements:
|- Invoice Fee should be included in the fee for first transaction of the month |- If there aren't any transactions that month, Merchant should not be charged Invoice Fee |- If transaction fee is 0 after applying discounts, InvoiceFee should not be added
|
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|Acceptance criteria:
|Given that 120 DKK transaction is made to 7-ELEVEN on 2018-09-02
|And 200 DKK transaction is made to NETTO on 2018-09-04
|And 300 DKK transaction is made to 7-ELEVEN on 2018-10-22
|And 150 DKK transaction is made to 7-ELEVEN on 2018-10-29
|When fees calculation app is executed
|Then the output is:
| 2018-09-02 7-ELEVEN 30.20
| 2018-09-04 NETTO 31.00
| 2018-10-22 7-ELEVEN 32.00
| 2018-10-29 7-ELEVEN 1.50
|
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                                       Sample test data                                                

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|Input:
|
|2018-09-01 7-ELEVEN 100
|2018-09-04 CIRCLE_K 100
|2018-09-07 TELIA 100
|2018-09-09 NETTO 100
|2018-09-13 CIRCLE_K 100
|2018-09-16 TELIA 100
|2018-09-19 7-ELEVEN 100
|2018-09-22 CIRCLE_K 100
|2018-09-25 TELIA 100
|2018-09-28 7-ELEVEN 100
|2018-09-30 CIRCLE_K 100
|
|2018-10-01 7-ELEVEN 100
|2018-10-04 CIRCLE_K 100
|2018-10-07 TELIA 100
|2018-10-10 NETTO 100
|2018-10-13 CIRCLE_K 100
|2018-10-16 TELIA 100
|2018-10-19 7-ELEVEN 100
|2018-10-22 CIRCLE_K 100
|2018-10-25 TELIA 100
|2018-10-28 7-ELEVEN 100
|2018-10-30 CIRCLE_K 100
|
|
|Output:
|
|2018-09-01 7-ELEVEN 30.00
|2018-09-04 CIRCLE_K 29.80
|2018-09-07 TELIA 29.90
|2018-09-09 NETTO 30.00
|2018-09-13 CIRCLE_K 0.80
|2018-09-16 TELIA 0.90
|2018-09-19 7-ELEVEN 1.00
|2018-09-22 CIRCLE_K 0.80
|2018-09-25 TELIA 0.90
|2018-09-28 7-ELEVEN 1.00
|2018-09-30 CIRCLE_K 0.80
|
|2018-10-01 7-ELEVEN 30.00
|2018-10-04 CIRCLE_K 29.80
|2018-10-07 TELIA 29.90
|2018-10-10 NETTO 30.00
|2018-10-13 CIRCLE_K 0.80
|2018-10-16 TELIA 0.90
|2018-10-19 7-ELEVEN 1.00
|2018-10-22 CIRCLE_K 0.80
|2018-10-25 TELIA 0.90
|2018-10-28 7-ELEVEN 1.00
|2018-10-30 CIRCLE_K 0.80
|
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