Added specs for BaseExecutor

spec/lib/system_check/base_executor_spec.rb

+require 'spec_helper'
+
+describe SystemCheck::BaseExecutor, lib: true do
+  class SimpleCheck < SystemCheck::BaseCheck
+    def check?
+      true
+    end
+  end
+
+  class OtherCheck < SystemCheck::BaseCheck
+    def check?
+      false
+    end
+  end
+
+  subject { described_class.new('Test') }
+
+  describe '#component' do
+    it 'returns stored component name' do
+      expect(subject.component).to eq('Test')
+    end
+  end
+
+  describe '#checks' do
+    before do
+      subject << SimpleCheck
+    end
+
+    it 'returns an array of classes' do
+      expect(subject.checks).to include(SimpleCheck)
+    end
+  end
+
+  describe '#<<' do
+    before do
+      subject << SimpleCheck
+    end
+
+    it 'appends a new check to the Set' do
+      subject << OtherCheck
+      stored_checks = subject.checks.to_a
+      expect(stored_checks.first).to eq(SimpleCheck)
+      expect(stored_checks.last).to eq(OtherCheck)
+    end
+
+    it 'inserts unique itens only' do
+      subject << SimpleCheck
+      expect(subject.checks.size).to eq(1)
+    end
+  end
+end