Add spec for CLI::Domains#crawl command (#28271)

spec/lib/mastodon/cli/domains_spec.rb

@@ -28,4 +28,51 @@ describe Mastodon::CLI::Domains do
       end
     end
   end
+
+  describe '#crawl' do
+    let(:action) { :crawl }
+
+    context 'with accounts from the domain' do
+      let(:domain) { 'host.example' }
+
+      before do
+        Fabricate(:account, domain: domain)
+        stub_request(:get, 'https://host.example/api/v1/instance').to_return(status: 200, body: {}.to_json)
+        stub_request(:get, 'https://host.example/api/v1/instance/peers').to_return(status: 200, body: {}.to_json)
+        stub_request(:get, 'https://host.example/api/v1/instance/activity').to_return(status: 200, body: {}.to_json)
+        stub_const('Mastodon::CLI::Domains::CRAWL_SLEEP_TIME', 0)
+      end
+
+      context 'with --format of summary' do
+        let(:options) { { format: 'summary' } }
+
+        it 'crawls the domains and summarizes results' do
+          expect { subject }
+            .to output_results('Visited 1 domains, 0 failed')
+        end
+      end
+
+      context 'with --format of domains' do
+        let(:options) { { format: 'domains' } }
+
+        it 'crawls the domains and summarizes results' do
+          expect { subject }
+            .to output_results(domain)
+        end
+      end
+
+      context 'with --format of json' do
+        let(:options) { { format: 'json' } }
+
+        it 'crawls the domains and summarizes results' do
+          expect { subject }
+            .to output_results(json_summary)
+        end
+
+        def json_summary
+          Oj.dump('host.example': { activity: {} })
+        end
+      end
+    end
+  end
 end