What

Create tests for React components UploadControl, CreateBuildConfigDialog and individual form sections in src/ui/components/build/create_build_config

Why

The complexity of the form is quite high and there are no tests yet.

How

Use similar approach as in the test here:
https://github.com/aerogear/mobile-developer-console/blob/master/ui/src/components/create_client/EditMobileClientBaseClass.test.js