How to Validate Exits and Aborts in Rspec

How can I validate exits and aborts in RSpec?

try this:

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

How to spec methods that exit or abort

Simply put your assertions outside of the lambda, for example:

class Foo
  attr_accessor :result

  def logic_and_exit
    @result = :bad_logic
    exit
  end
end

describe 'Foo#logic_and_exit' do
  before(:each) do
    @foo = Foo.new
  end

  it "should set @foo" do
    lambda { @foo.logic_and_exit; exit }.should raise_error SystemExit
    @foo.result.should == :logics
  end
end

When I run rspec, it correctly tells me:

expected: :logics
     got: :bad_logic (using ==)

Is there any case where this wouldn't work for you?

EDIT: I added an 'exit' call inside the lambda to hande the case where logic_and_exit doesn't exit.

EDIT2: Even better, just do this in your test:

begin
  @foo.logic_and_exit
rescue SystemExit
end
@foo.result.should == :logics

Test exit! with RSpec

You can stub the exit! method for the object:

it "logs a fatal error" do
  lambda do
    allow(object).to receive(:exit!)
    object.method
    expect(logger).to have_received(:error).with("FATAL ERROR")
  end
end

it "exits" do
  expect(object).to receive(:exit!)

  object.method
end

How do I write a bash script to abort a rspec test if it fails

You can just use normal exit codes, since bundle exec rspec will preserve the exit code from rspec. E.g.

#!/bin/bash
if ! bundle exec rspec spec/ --format documentation --fail-fast; then
  echo "failed rspec test"
else
  echo "rspec test passed; Warbalize Now!!!!!"
fi

How do I abort RSpec if setup fails?

You don't need any special RSpec magic for this - just test that your service is running in your spec_helper.rb, and raise an exception if it's not running.

if service_not_running
  raise "Service is not running. Please start it with {whatever}."
end

This will cause your rspec suite to immediately fail when it starts, with a helpful error that helps the programmer get the service started.

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