searchPaths.filter is not a function

[pietro909]

See this issue on react-native about how to reproduce it.

The error is located in lib/pbxProject.js, in removeFromFrameworkSearchPaths and `addToFrameworkSearchPaths:

if (searchPaths) {
    var matches = searchPaths.filter(function(p) {

I've noticed that there are no tests for those functions, maybe we can work together to cover those cases?

Thanks