Add Crono::Cronotab to process cronotab

spec/cronotab_spec.rb

@@ -0,0 +1,20 @@
+require 'spec_helper'
+
+describe Crono::Cronotab do
+  describe '#process' do
+    it 'should load cronotab file' do
+      cronotab_path = File.expand_path('../assets/good_cronotab.rb', __FILE__)
+      expect(Crono.scheduler).to receive(:add_job).with(kind_of(Crono::Job))
+      expect {
+        Crono::Cronotab.process(cronotab_path)
+      }.to_not raise_error
+    end
+
+    it 'should raise error when cronotab is invalid' do
+      cronotab_path = File.expand_path('../assets/bad_cronotab.rb', __FILE__)
+      expect {
+        Crono::Cronotab.process(cronotab_path)
+      }.to raise_error
+    end
+  end
+end