From: Gregory Brown <gregory.t.brown@...>
Date: 2007-07-03T08:52:47+09:00
Subject: Re: Testing for warnings

On 7/2/07, Alex Gutteridge <alexg@kuicr.kyoto-u.ac.jp> wrote:

> I specifically need to check for warnings from C code so replacing
> Kernel#warn won't work. I will try hooking into STDERR though -
> thanks for the idea.

Possibly make use of Mocha or another mocking framework?

class Foo
  def bar
    warn "baz"
  end
end

require "test/unit"
require "rubygems"
require "mocha"

class TestFoo < Test::Unit::TestCase

  def test_bar_should_warn
    a = Foo.new
    a.expects(:warn).with("baz")
    a.bar
  end

end