Minitest/MultipleAssertions crashes when using ActiveSupport test "name" do ... end syntax

[mattbrictson]

Expected behavior

I should be able to use rubocop-minitest, specifically the Minitest/MultipleAssertions rule, on a Rails project that uses ActiveSupport::TestCase block syntax.

Actual behavior

rubocop crashes:

1 error occurred:
An error occurred while Minitest/MultipleAssertions cop was inspecting 
test/models/example_test.rb:3:0.
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:
1.13.0 (using Parser 3.0.1.0, rubocop-ast 1.4.1, running on ruby 3.0.1 x86_64-darwin20)
Finished in 0.5184599999920465 seconds

An error occurred while Minitest/MultipleAssertions cop was inspecting test/models/example_test.rb:3:0.
undefined method `name' for #<Parser::Source::Map::Collection:0x000000010b5b5c78 @end=#<Parser::Source::Range test/models/example_test.rb 221...224>, @begin=#<Parser::Source::Range test/models/example_test.rb 86...88>, @expression=#<Parser::Source::Range test/models/example_test.rb 69...224>, @node=s(:block,
  s(:send, nil, :test,
    s(:str, "something")),
  s(:args),
  s(:begin,
    s(:send, nil, :refute_equal,
      s(:str, "a"),
      s(:str, "")),
    s(:send, nil, :refute_equal,
      s(:str, "b"),
      s(:str, "")),
    s(:send, nil, :refute_equal,
      s(:str, "c"),
      s(:str, "")),
    s(:send, nil, :refute_equal,
      s(:str, "d"),
      s(:str, "")),
    s(:send, nil, :refute_equal,
      s(:str, "e"),
      s(:str, ""))))>
/Users/mbrictson/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/rubocop-minitest-0.12.0/lib/rubocop/cop/minitest/multiple_assertions.rb:46:in `block in on_class'
/Users/mbrictson/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/rubocop-minitest-0.12.0/lib/rubocop/cop/minitest/multiple_assertions.rb:38:in `each'
/Users/mbrictson/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/rubocop-minitest-0.12.0/lib/rubocop/cop/minitest/multiple_assertions.rb:38:in `on_class'

Steps to reproduce the problem

Create a trivial ActiveSupport::TestCase using the test block syntax, that fails the Minitest/MultipleAssertions rule. Like this:

require "test_helper"

class ExampleTest < ActiveSupport::TestCase
  test "something" do
    refute_equal("a", "")
    refute_equal("b", "")
    refute_equal("c", "")
    refute_equal("d", "")
    refute_equal("e", "")
  end
end

Run rubocop:

$ bundle exec rubocop -d test/models/example_test.rb

RuboCop version

$ bundle exec rubocop -V
1.13.0 (using Parser 3.0.1.0, rubocop-ast 1.4.1, running on ruby 3.0.1 x86_64-darwin20)
  - rubocop-minitest 0.12.0
  - rubocop-performance 1.11.0
  - rubocop-rails 2.9.1
  - rubocop-rspec 2.2.0