Add spec coverage for `CLI::Emoji` class (#28182)

spec/lib/mastodon/cli/emoji_spec.rb

@@ -4,5 +4,59 @@ require 'rails_helper'
 require 'mastodon/cli/emoji'
 
 describe Mastodon::CLI::Emoji do
+  subject { cli.invoke(action, args, options) }
+
+  let(:cli) { described_class.new }
+  let(:args) { [] }
+  let(:options) { {} }
+
   it_behaves_like 'CLI Command'
+
+  describe '#purge' do
+    let(:action) { :purge }
+
+    context 'with existing custom emoji' do
+      before { Fabricate(:custom_emoji) }
+
+      it 'reports a successful purge' do
+        expect { subject }
+          .to output_results('OK')
+      end
+    end
+  end
+
+  describe '#import' do
+    context 'with existing custom emoji' do
+      let(:import_path) { Rails.root.join('spec', 'fixtures', 'files', 'elite-assets.tar.gz') }
+      let(:action) { :import }
+      let(:args) { [import_path] }
+
+      it 'reports about imported emoji' do
+        expect { subject }
+          .to output_results('Imported 1')
+          .and change(CustomEmoji, :count).by(1)
+      end
+    end
+  end
+
+  describe '#export' do
+    context 'with existing custom emoji' do
+      before { Fabricate(:custom_emoji) }
+      after { File.delete(export_path) }
+
+      let(:export_path) { Rails.root.join('tmp', 'export.tar.gz') }
+      let(:args) { [Rails.root.join('tmp')] }
+      let(:action) { :export }
+
+      it 'reports about exported emoji' do
+        expect { subject }
+          .to output_results('Exported 1')
+          .and change { File.exist?(export_path) }.from(false).to(true)
+      end
+    end
+  end
+
+  def output_results(string)
+    output(a_string_including(string)).to_stdout
+  end
 end