Formalize some patterns in cli specs (#28255)

spec/lib/mastodon/cli/statuses_spec.rb

@@ -4,26 +4,31 @@ require 'rails_helper'
 require 'mastodon/cli/statuses'
 
 describe Mastodon::CLI::Statuses do
+  subject { cli.invoke(action, arguments, options) }
+
   let(:cli) { described_class.new }
+  let(:arguments) { [] }
+  let(:options) { {} }
 
   it_behaves_like 'CLI Command'
 
   describe '#remove', use_transactional_tests: false do
+    let(:action) { :remove }
+
     context 'with small batch size' do
       let(:options) { { batch_size: 0 } }
 
       it 'exits with error message' do
-        expect { cli.invoke :remove, [], options }.to output(
-          a_string_including('Cannot run')
-        ).to_stdout.and raise_error(SystemExit)
+        expect { subject }
+          .to output_results('Cannot run')
+          .and raise_error(SystemExit)
       end
     end
 
     context 'with default batch size' do
       it 'removes unreferenced statuses' do
-        expect { cli.invoke :remove }.to output(
-          a_string_including('Done after')
-        ).to_stdout
+        expect { subject }
+          .to output_results('Done after')
       end
     end
   end