all_be_matcher_spec.rb

require 'rubygems'
require 'spec'

describe "iterative matchers" do
  def all_be &block
    simple_matcher "all be" do |given, matcher|
      matcher.failure_message = "expected #{given.inspect} to all be something"
      matcher.negative_failure_message = "expected #{given.inspect} to not all be something"
      given.all? &block
    end
  end

  def have_any &block
    simple_matcher "have any" do |given, matcher|
      matcher.failure_message = "expected #{given.inspect} to have at least one something"
      matcher.negative_failure_message = "expected #{given.inspect} to not have any something"
      given.any? &block
    end
  end

  it "positive numbers should all be greater than 0" do
     [1,2,3].should all_be { |x| x > 0 }
  end

  it "positive numbers should not have any less than 0" do
     [1,2,3].should_not have_any { |x| x < 0 }
  end
end