I started writing some tests for module processing: https://github.com/Deraen/clojurescript/blob/cljs-1762/src/test/clojure/cljs/module_processing_tests.clj

Currently I'm stuck on trying to understand why jscomp.Compiler outputs non processed source: https://github.com/Deraen/clojurescript/blob/cljs-1762/src/main/clojure/cljs/closure.clj#L1529