Minitest/GlobalExpectations cop does not find offenses for must_be_nil and wont_be_nil expectations

[yahonda]

Expected behavior

Minitest/GlobalExpectations cop does not find offenses for wont_be_nil and must_be_nil as implemented at https://github.com/rubocop-hq/rubocop-minitest/blob/b6df77ea23fc633fb5fcdd6230101d5e1464b943/lib/rubocop/cop/minitest/global_expectations.rb#L25 and https://github.com/rubocop-hq/rubocop-minitest/blob/b6df77ea23fc633fb5fcdd6230101d5e1464b943/lib/rubocop/cop/minitest/global_expectations.rb#L28

Actual behavior

Minitest/GlobalExpectations finds offenses for and must_be_nil and wont_be_nil.

Steps to reproduce the problem

• Create a script file rep.rb to reproduce

# frozen_string_literal: true

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'
  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
  gem 'minitest'
end

# Avoid `Style/Documentation: Missing top-level class documentation comment.`
class Greeting
  def say_hello
    'Hello, World!'
  end

  def say_nothing; end
end

require 'minitest/autorun'
describe Greeting do
  before do
    @foo = Greeting.new
  end

  it 'must say nothing must be nil' do
    # Bad and offense is NOT found by RuboCop
    @foo.say_nothing.must_be_nil
  end
  it 'must say hello wont be nil' do
    # Bad and offense is NOT found by RuboCop
    @foo.say_hello.wont_be_nil
  end
  it 'must say hello world with a warning' do
    # Bad and offense is found by RuboCop
    # It just proves RuboCop Minitest is working.
    @foo.say_hello.must_equal 'Hello, World!'
  end
end

• Execute rep.rb and shows 3 deprecated warnings as expected

% ruby rep.rb
Fetching gem metadata from https://rubygems.org/..................
Resolving dependencies...
Using bundler 2.1.4
Using minitest 5.14.0
Run options: --seed 34712

# Running:

DEPRECATED: global use of must_be_nil from rep.rb:28. Use _(obj).must_be_nil instead. This will fail in Minitest 6.
.DEPRECATED: global use of wont_be_nil from rep.rb:32. Use _(obj).wont_be_nil instead. This will fail in Minitest 6.
.DEPRECATED: global use of must_equal from rep.rb:37. Use _(obj).must_equal instead. This will fail in Minitest 6.
.

Finished in 0.000850s, 3529.4118 runs/s, 3529.4118 assertions/s.

3 runs, 3 assertions, 0 failures, 0 errors, 0 skips
%

• Run RuboCop Minitest to find these 3 offenses then only 1 offense for must_equal is found. This one just proves RuboCop minitest is working.

% rubocop --require rubocop-minitest --only Minitest/GlobalExpectations                                                                                                                                                     master
Inspecting 1 file
C

Offenses:

rep.rb:37:5: C: Minitest/GlobalExpectations: Use _(@foo.say_hello) instead.
    @foo.say_hello.must_equal 'Hello, World!'
    ^^^^^^^^^^^^^^

1 file inspected, 1 offense detected
%

RuboCop version

% rubocop -V
0.81.0 (using Parser 2.7.1.0, running on ruby 2.7.1 x86_64-darwin19)

[koic]

Thanks for the feedback. I opened #76.