Fix tests and some deprecation warnings

spree-contrib / spree_print_invoice

Create a PDF invoice for Spree orders.

http://guides.spreecommerce.org

BSD 3-Clause "New" or "Revised" License

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Closed voleoo closed 4 years ago

voleoo commented 4 years ago

Hi, @damianlegawiec

Relative to the previous PR #139, I decided to first fix the tests and then make a PR.

Please have a chance to review this PR

Thanks.