specs for services

spec/services/proforma_service/export_task_spec.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ProformaService::ExportTask do
+  describe '.new' do
+    subject(:export_task) { described_class.new(exercise: exercise) }
+
+    let(:exercise) { FactoryBot.build(:dummy) }
+
+    it 'assigns exercise' do
+      expect(export_task.instance_variable_get(:@exercise)).to be exercise
+    end
+
+    context 'without exercise' do
+      subject(:export_task) { described_class.new }
+
+      it 'assigns exercise' do
+        expect(export_task.instance_variable_get(:@exercise)).to be nil
+      end
+    end
+  end
+
+  describe '#execute' do
+    subject(:export_task) { described_class.call(exercise: exercise) }
+
+    let(:task) { Proforma::Task.new }
+    let(:exercise) { FactoryBot.build(:dummy) }
+    let(:exporter) { instance_double('Proforma::Exporter', perform: 'zip') }
+
+    before do
+      allow(ProformaService::ConvertExerciseToTask).to receive(:call).with(exercise: exercise).and_return(task)
+      allow(Proforma::Exporter).to receive(:new).with(task).and_return(exporter)
+    end
+
+    it do
+      export_task
+      expect(exporter).to have_received(:perform)
+    end
+  end
+end