如何验证RSpec中的退出和中止?

问题描述

我正在尝试为脚本接收的命令行参数指定行为，以确保所有验证均通过.我的某些命令行参数将导致abort或exit被调用，因为提供的参数丢失或不正确.

I am trying to spec behaviors for command line arguments my script receives to ensure that all validation passes. Some of my command line arguments will result in abort or exit being invoked because the parameters supplied are missing or incorrect.

我正在尝试这种不起作用的事情:

I am trying something like this which isn't working:

# something_spec.rb
require 'something'
describe Something do
    before do
        Kernel.stub!(:exit)
    end

    it "should exit cleanly when -h is used" do
        s = Something.new
        Kernel.should_receive(:exit)
        s.process_arguments(["-h"])
    end
end

exit方法正在彻底触发，阻止RSpec验证测试(我得到"SystemExit:退出").

The exit method is firing cleanly preventing RSpec from validating the test (I get "SystemExit: exit").

我也尝试过mock(Kernel)，但是也无法按我的意愿进行(我看不到任何明显的区别，但这很可能是因为我不确定如何精确模拟内核并确保我的Something类中使用了模拟内核).

I have also tried to mock(Kernel) but that too is not working as I'd like (I don't see any discernible difference, but that's likely because I'm not sure how exactly to mock Kernel and make sure the mocked Kernel is used in my Something class).

推荐答案

尝试一下:

module MyGem
  describe "CLI" do
    context "execute" do

      it "should exit cleanly when -h is used" do
        argv=["-h"]
        out = StringIO.new
        lambda { ::MyGem::CLI.execute( out, argv) }.should raise_error SystemExit
      end

    end
  end
end

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