MockDate | A JavaScript Mock Date object that can be used to change when "now" is | Date Time Utils library

To be able to build the project with react-native-maps and use_frameworks as described in the question I had to fork the react-native-maps library and replace

Google-Maps-iOS-Utils with Google_Maps_iOS_Utils in header imports in

lib/ios/AirGoogleMaps/AIRGoogleMap.m:

MockDate is supposed to mimic new Date() which is a constructor and arrow function cannot be used as a constructor

More information here:

• https://dmitripavlutin.com/when-not-to-use-arrow-functions-in-javascript/
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions

You are setting the spy on the wrong object. When running Intl.DateTimeFormat() you are creating a new object, both in the test and the component.

You should probably spy on DateTimeFormat.

Thanks chepner for the hint. For future reference, here is a working solution:

What you are basically doing is that:

Disable strict mode or use serial mode.

If your build takes longer than 10m without output this will happen.

You can use travis_wait to print something to the console each minute, as per the docs: https://docs.travis-ci.com/user/common-build-problems/#build-times-out-because-no-output-was-received

Just travis_wait {your_command} and you should be good to go.

Be aware that your build taking longer than 10m could be a indicator of a more complicated underlying problem/freeze.

Presuming you're trying to create a consistent output disregarding the given date argument, you can create Node Module mock like this: