Add coverage for CLI::Maintenance#fix_duplicates command (#25252)

spec/lib/mastodon/cli/maintenance_spec.rb

@@ -4,9 +4,51 @@ require 'rails_helper'
 require 'mastodon/cli/maintenance'
 
 describe Mastodon::CLI::Maintenance do
+  let(:cli) { described_class.new }
+
   describe '.exit_on_failure?' do
     it 'returns true' do
       expect(described_class.exit_on_failure?).to be true
     end
   end
+
+  describe '#fix_duplicates' do
+    context 'when the database version is too old' do
+      before do
+        allow(ActiveRecord::Migrator).to receive(:current_version).and_return(2000_01_01_000000) # Earlier than minimum
+      end
+
+      it 'Exits with error message' do
+        expect { cli.invoke :fix_duplicates }.to output(
+          a_string_including('is too old')
+        ).to_stdout.and raise_error(SystemExit)
+      end
+    end
+
+    context 'when the database version is too new and the user does not continue' do
+      before do
+        allow(ActiveRecord::Migrator).to receive(:current_version).and_return(2100_01_01_000000) # Later than maximum
+        allow(cli.shell).to receive(:yes?).with('Continue anyway? (Yes/No)').and_return(false).once
+      end
+
+      it 'Exits with error message' do
+        expect { cli.invoke :fix_duplicates }.to output(
+          a_string_including('more recent')
+        ).to_stdout.and raise_error(SystemExit)
+      end
+    end
+
+    context 'when Sidekiq is running' do
+      before do
+        allow(ActiveRecord::Migrator).to receive(:current_version).and_return(2022_01_01_000000) # Higher than minimum, lower than maximum
+        allow(Sidekiq::ProcessSet).to receive(:new).and_return [:process]
+      end
+
+      it 'Exits with error message' do
+        expect { cli.invoke :fix_duplicates }.to output(
+          a_string_including('Sidekiq is running')
+        ).to_stdout.and raise_error(SystemExit)
+      end
+    end
+  end
 end