added fees (feature request #69)

[michi-dev]

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• [x] Does your code follow the WordPress' coding standards?
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Changes proposed in this Pull Request:

Closes #69.

"It would be very nice to add some fees to the order. I would add some example fee amounts : $10.00 (fixed) , $100.00 (fixed), $1000.00 (fixed), 10% (percentage), 33% (percentage). I would add it to every (lets say) every 5. order."

• every 5. order (randomized function so not particular ever 5.) gets a fee
• the fee is a float between 0.05 and 100 (used https://github.com/fzaninotto/Faker )
• I just used absolute values -> because you only can insert relative percentages via the graphical interface. After that it will be set as absolute values

How to test the changes in this Pull Request:

1. use the generall command wp wc generate orders <amount> at least with amount 5
2. remeber that its random -> so it could depend if its every 5. order

Other information:

• [X] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests for your changes, as applicable?
• [X] Have you successfully run tests with your changes locally?

Changelog entry

add fees to orders randomly (every 5. order, fees from 0.05 - 100 in specific currency)

Enter a summary of all changes on this Pull Request. This will appear in the changelog if accepted.

FOR PR REVIEWER ONLY:

• [ ] I have reviewed that everything is sanitized/escaped appropriately for any SQL or XSS injection possibilities. I made sure Linting is not ignored or disabled.

[masteradhoc]

@rrennick any chance someone of your team can take a look at it anytime next?

[rrennick]

@masteradhoc Thanks for the ping. I'm working on a non-Woo project ATM. @ObliviousHarmony Could you follow up here?

[michi-dev]

changes have been done @Luc45

[masteradhoc]

@Luc45 any update on these PR's?

[samueljseay]

I see no reason why we can't merge this. Thanks for this @michi-dev and apologies this has been sitting around so long.