RSpec:stubbing Kernel :: sleep？

Question

有没有办法在rspec场景中存根Kernel.sleep？

Answer 1

如果您在对象的上下文中调用sleep,则应将其存储在对象上,如下所示:

class Foo
  def self.some_method
    sleep 5
  end
end

it "should call sleep" do
  Foo.stub!(:sleep)
  Foo.should_receive(:sleep).with(5)
  Foo.some_method
end

关键是,在调用睡眠的上下文中,对任何"自我"进行存根休眠.

Answer 2

当调用sleep不在对象内时(例如,在测试rake任务时),可以在before块中添加以下内容(rspec 3语法)

allow_any_instance_of(Object).to receive(:sleep)

Answer 3

在纯 rspec 中：

before do
  Kernel.stub!(:sleep)
end

it "should sleep" do
  Kernel.should_receive(:sleep).with(100)
  Object.method_to_test #We need to call our method to see that it is called
end