"Don't know how to build task 'test'"

[mroach]

https://github.com/renchap/webpacker-react/blob/master/lib/tasks/example_app.rake#L15

This line requires that there be a rake task called test defined. If none is defined in your app, the entire rake system is broken. Can't run rake -T or any tasks.

Was this meant to be done in the example_app namespace?

My Rakefile

require_relative 'config/application'

Rails.application.load_tasks

Using Ruby 2.4.1, Rails 5.1, webpacker 2.0, webpacker-react 0.3.0

[renchap]

Yes, I added this to ensure that example_app:webpack was launched before running this gem tests.

From what I understand, in your case this task is also launched when you run rails test in your Rails project? It is not the case for my project using Rails 5.1 (but I have the standard test rake task created by Rails).

Do you have any idea why a task defined in the webpacker-react gem is loaded by rake in your own project?

[mroach]

In my project I'm not using MiniTest so there's no test task, only spec for RSpec. I'm guessing that Rails.application.load_tasks eagerly loads all tasks from all gems, right?

[renchap]

This is fixed in 0.3.1, thanks for the report!
It looks like Rails indeed loads this path for all gems, I did not knew this.