Minitest/TestFileName errors on empty files

[movermeyer]

Expected behavior

No failures when analyzing empty files (or files with only comments)

Actual behavior

Minitest/TestFileName errors:

An error occurred while Minitest/TestFileName cop was inspecting /Users/michael.overmeyer/src/github.com/Shopify/shopify-i18n/test/empty.rb.

Running with -d flag to get additional output:

Full stack trace

rubocop -d --only=Minitest/TestFileName test/empty.rb
For /Users/michael.overmeyer/src/github.com/<redacted>: configuration from /Users/michael.overmeyer/src/github.com/<redacted>/.rubocop.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-minitest-0.26.0/config/default.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-minitest-0.26.0/config/default.yml
Default configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/config/default.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-performance-1.15.2/config/default.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-performance-1.15.2/config/default.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-rake-0.6.0/config/default.yml
configuration from /Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-rake-0.6.0/config/default.yml
Use parallel by default.
Skipping parallel inspection: only a single file needs inspection
Inspecting 1 file
Scanning /Users/michael.overmeyer/src/github.com/<redacted>/test/empty.rb
An error occurred while Minitest/TestFileName cop was inspecting /Users/michael.overmeyer/src/github.com/<redacted>/test/empty.rb.
undefined method `class_type?' for nil:NilClass

          return true if node.class_type? && test_class?(node)
                             ^^^^^^^^^^^^
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-minitest-0.26.0/lib/rubocop/cop/minitest/test_file_name.rb:32:in `test_file?'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-minitest-0.26.0/lib/rubocop/cop/minitest/test_file_name.rb:24:in `on_new_investigation'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:154:in `block (2 levels) in invoke'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:165:in `with_cop_error_handling'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:154:in `block in invoke'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:154:in `each'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:154:in `invoke'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/commissioner.rb:84:in `investigate'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/team.rb:154:in `investigate_partial'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cop/team.rb:97:in `investigate'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:322:in `inspect_file'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:266:in `block in do_inspection_loop'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:300:in `block in iterate_until_no_changes'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:293:in `loop'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:293:in `iterate_until_no_changes'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:262:in `do_inspection_loop'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:143:in `block in file_offenses'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:168:in `file_offense_cache'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:142:in `file_offenses'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:133:in `process_file'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:114:in `block in each_inspected_file'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:113:in `each'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:113:in `reduce'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:113:in `each_inspected_file'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:99:in `inspect_files'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/runner.rb:52:in `run'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/command/execute_runner.rb:26:in `block in execute_runner'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/command/execute_runner.rb:52:in `with_redirect'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/command/execute_runner.rb:25:in `execute_runner'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/command/execute_runner.rb:17:in `run'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/command.rb:11:in `run'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli/environment.rb:18:in `run'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli.rb:72:in `run_command'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli.rb:79:in `execute_runners'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/lib/rubocop/cli.rb:48:in `run'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/exe/rubocop:19:in `block in <top (required)>'
/opt/rubies/3.1.2/lib/ruby/3.1.0/benchmark.rb:311:in `realtime'
/Users/michael.overmeyer/.gem/ruby/3.1.2/gems/rubocop-1.43.0/exe/rubocop:19:in `<top (required)>'
/Users/michael.overmeyer/.gem/ruby/3.1.2/bin/rubocop:25:in `load'
/Users/michael.overmeyer/.gem/ruby/3.1.2/bin/rubocop:25:in `<main>'
.

1 file inspected, no offenses detected

1 error occurred:
An error occurred while Minitest/TestFileName cop was inspecting /Users/michael.overmeyer/src/github.com/<redacted>/test/empty.rb.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
https://github.com/rubocop/rubocop/issues

Mention the following information in the issue report:
1.43.0 (using Parser 3.2.0.0, rubocop-ast 1.24.1, running on ruby 3.1.2) [arm64-darwin21]
Finished in 0.21253699995577335 seconds

Describe here what actually happened.

Steps to reproduce the problem

mkdir test
touch test/empty.rb
rubocop --only=Minitest/TestFileName test/empty.rb
# Fails

echo "# Just a comment" > test/comment.rb
rubocop --only=Minitest/TestFileName test/comment.rb
# Also fails

RuboCop version

1.43.0 (using Parser 3.2.0.0, rubocop-ast 1.24.1, running on ruby 3.1.2) [arm64-darwin21]
  - rubocop-minitest 0.26.0
  - rubocop-performance 1.15.2
  - rubocop-rake 0.6.0

[koic]

This issue is a dup with #225 and fixed by #227. I will release later.

[koic]

FYI, RuboCop Minitest 0.26.1 has been released:
https://github.com/rubocop/rubocop-minitest/releases/tag/v0.26.1