FAForever / faftools / 298

72%

Pull #33

travis-ci

Fix mod validation failing for empty string values

marshmallow does not like empty strings in `UrlField`s and therefore
failed validation if a `mod_info.lua` contained `url = ""`.

This commit removes all `None` and `""` values from the data before
passing it to the marshmallow schema.

Fixes #31

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619 of 858 relevant lines covered (72.14%)

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