Add Job class

spec/job_spec.rb

@@ -0,0 +1,22 @@
+require "spec_helper"
+
+class TestJob
+  def perform;end
+end
+
+describe Crono::Job do
+  let(:period) { Crono::Period.new(2.day) }
+  let(:job) { Crono::Job.new(TestJob, period) } 
+
+  it "should contain performer and period" do
+    expect(job.performer).to be TestJob
+    expect(job.period).to be period
+  end
+
+  describe "#perform" do
+    it "should run performer in separate thread" do
+      thread = job.perform.join
+      expect(thread).to be_stop
+    end
+  end
+end