Ignoring exit when running Rspec

Question

In Ruby, I need to print a feedback message and then exit with a status code of 1.

class Foo
  def bar
    puts "error"
    exit 1
  end
end

In RSpec, how can I ignore exit 1 when expecting the feedback message to be printed?

it "returns a feedback message" do
  expect { Foo.new.bar }.to output(/no error/i).to_stdout
end

If I run the spec above, no failure is raised.

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1 example, 0 failures

Answer 1

exit raises a SystemExit error. You can rescue it like any other error or expect to raise_error:

RSpec.describe Foo do
  it "returns a feedback message" do
    expect { Foo.new.bar }
      .to output(/no error/i).to_stdout
      .and raise_error(SystemExit)
  end
end