Feature/coverage

[SukiCZ]

This improves coverage from 79% to 97%

[atbuy]

Looks good, nice idea to add tests for multiple pil versions, but I think the tests are badly written from the start. I'll try to rewrite them when I find the time.

[SukiCZ]

Do you have anything particular in mind?

I think they are fine and we can iterate from here. Maybe test_ean.py is getting lenghty and could be split to separate files.

[atbuy]

@SukiCZ I was thinking more like tests using classes. I think they are more readable and more explicit. I'll probably have time tomorrow to implement them. I'll open a PR.

Do you have anything particular in mind?

I think they are fine and we can iterate from here. Maybe test_ean.py is getting lenghty and could be split to separate files.

[SukiCZ]

@atbuy You mean something like 201ce27 ? 😏