ruby – 检查方法是否是rspec中另一个方法的别名

class Article
  alias to_archive archived!
end

我需要确保这一点,所以我写了这个测试：

describe '#to_archive' do
  it 'is an alias to #archived!' do
    expect(subject.method(:to_archive)).to eq(subject.method(:archived!))
  end
end

但是,我收到一个错误

Failure/Error: expect(subject.method(:to_archive)).to eq(subject.method(:archived!))

   expected: #<Method: Article(#<Module:0x00000005a7c240>)#archived!>
        got: #<Method: Article(#<Module:0x00000005a7c240>)#to_archive(archived!)>

它曾经用于ruby< 2.3 IIRC.我尝试了alias_method,但它没有帮助.