def collection_tests(collection, params = {}, mocks_implemented = true)
  tests("success") do
    tests("#new(#{params.inspect})").succeeds do
      pending if Fog.mocking? && !mocks_implemented
      collection.new(params)
    end

    tests("#create(#{params.inspect})").succeeds do
      pending if Fog.mocking? && !mocks_implemented
      @instance = collection.create(params)
    end
    # FIXME: work around for timing issue on AWS describe_instances mocks

    if Fog.mocking? && @instance.respond_to?(:ready?)
      @instance.wait_for { ready? }
    end

    tests("#all").succeeds do
      pending if Fog.mocking? && !mocks_implemented
      collection.all
    end

    if !Fog.mocking? || mocks_implemented
      @identity = @instance.identity
    end

    tests("#get(#{@identity})").succeeds do
      pending if Fog.mocking? && !mocks_implemented
      collection.get(@identity)
    end

    tests("Enumerable") do
      pending if Fog.mocking? && !mocks_implemented

      methods = [
        "all?", "any?", "find", "detect", "collect", "map",
        "find_index", "flat_map", "collect_concat", "group_by",
        "none?", "one?"
      ]

      # JRuby 1.7.5+ issue causes a SystemStackError: stack level too deep
      # https://github.com/jruby/jruby/issues/1265
      if RUBY_PLATFORM == "java" && JRUBY_VERSION =~ /1\.7\.[5-8]/
        methods.delete("all?")
      end

      methods.each do |enum_method|
        if collection.respond_to?(enum_method)
          tests("##{enum_method}").succeeds do
            block_called = false
            collection.send(enum_method) { |_x| block_called = true }
            block_called
          end
        end
      end

      %w(
        max_by min_by).each do |enum_method|
        if collection.respond_to?(enum_method)
          tests("##{enum_method}").succeeds do
            block_called = false
            collection.send(enum_method) { |_x| block_called = true; 0 }
            block_called
          end
        end
      end
    end

    if block_given?
      yield(@instance)
    end

    if !Fog.mocking? || mocks_implemented
      @instance.destroy
    end
  end

  tests("failure") do
    if !Fog.mocking? || mocks_implemented
      @identity = @identity.to_s
      @identity = @identity.gsub(/[a-zA-Z]/) { Fog::Mock.random_letters(1) }
      @identity = @identity.gsub(/\d/)       { Fog::Mock.random_numbers(1) }
      @identity
    end

    tests("#get('#{@identity}')").returns(nil) do
      pending if Fog.mocking? && !mocks_implemented
      collection.get(@identity)
    end
  end
end
