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Rails Minitest crashing when tests fail

Isaac
1#
Isaac Published in 2018-01-12 15:43:28Z

Minitest crashes every time a test fails when I run rails test (Rails 5 and Ruby 2.4.2). For example, I forced a simple test to fail by switching the assert to assert_not:

Failure: TransactionTest#test_transaction_should_be_valid [/home/.../test/models/transaction_test.rb:11]: Expected true to be nil or false

/home/.../.rvm/gems/ruby-2.4.2/gems/railties-5.1.4/lib/rails/test_unit/reporter.rb:70:in `method': undefined method `test_transaction_should_be_valid' for class `Minitest::Result' (NameError)

If the test passes, then the entire report is successful and I get the report summary. If only one test fails I get the error report above. I defined test_transaction_should_be_valid in my transaction_test.rb file and the proof of it is that it runs smoothly when the test passes.

I'm stuck on this now. Any ideas as to what might be causing this?

allanberry
2#
allanberry Reply to 2018-01-17 22:37:49Z

Apparently Rails is not yet quite compatible with Minitest 5.10/5.11: https://github.com/seattlerb/minitest/issues/730 They have posted a monkeypatch to tide us over.

Rails has apparently also fixed this in edge. https://github.com/rails/rails/pull/31624

This error disappeared for me when I pulled from the master branch. Put this in your Gemfile:

gem 'rails', git: 'https://github.com/rails/rails.git'

edit: promoting from comments (thanks coco9nyc):

or you can try downgrading minitest:

gem 'minitest', '5.10.3'
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