RSpec include_kind_of

foo_spec.rb

require 'spec_helper'

module Bar
  def bar ; end
end

class Foo
  include Bar
end

describe 'include_kind_of' do
  it 'should return true if array contains object of kind_of expected' do
    ary = [Foo.new]
    ary.should include_kind_of Bar
  end

  it 'should return false if array contains a class of expected' do
    ary = [Foo]
    ary.should_not include_kind_of Bar
  end
end

spec_helper.rb

RSpec::Matchers.define :include_kind_of do |expected|
  match do |actual|
    actual.count { |c| c.kind_of? expected } > 0
  end

  failure_message_for_should do |actual|
    "expected to include kind of #{expected}, found none."
  end
end

What I did was similar:

actual.map(&:class).should include(expected)

Those do two different things. kind_of? doesn't just look at the class, but the class hierarchy and module inclusion.

Yeah, thus "similar" :). I think I'm just going to sub yours in here.

This is interesting and unexpected:

"expected [#<TestWidget:0x00000100fd1e38 @embedded=#<RSpec::Mocks::Mock:0x807e7b58 @name=nil>>] to include kind of TestWidget, found none."

probably a reloading issue?

Doh. I'm pretty sure I know the problem, will test to verify.

kind_of works on objects, not classes. Updated gist to reflect this disparity, but I'll see if I can meet both cases.