rails-test-runner | Visual studio code to run your specs | Application Framework library

I upgraded from rails 5.1.1 to rails 5.2.0. My process was the following:

• Upgraded the rails gems and resolved dependency issues
• Looked at the railsdiff between 5.1.1 and 5.2.0 and updated files as needed

Everything looks to be working well except I noticed some odd behavior within my test suite

• running the command rails test test/system is not running my system tests at all. It runs all of my other tests (policies, services, models, jobs), but does not run my system tests.
  • Strangely: running a specific system test file, ex: rails test test/system/comment_test.rb works.
• Running specific directories of tests no longer works. For example, previously I could run rails test test/policies, rails test test/models, and rails test test/services and it would only run tests in those directories. This is no longer working. Instead it just runs all of tests (except the system tests).

Any idea what changed between rails 5.1.1 and rails 5.2.0 that is causing this behavior? Or, perhaps I am just missing something?

According to the Rails Guides Testing Rails Applications: 2.7 The Rails Test Runner, it states that one should be able to run tests on a per-directory basis:

You can also run an entire directory of tests by providing the path to the directory.

Expected behavior:

rails test => run entire test suite

rails test test/system => run all tests in the system directory

rails test test/models => run only the tests in the models directory

Reproducing the Behavior

I can reproduce the behavior with the following commands: