Redefine Enumerable#flat_map for rspec to use

Author: adambeynon

opal-rspec.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.require_paths  = ['lib']
 
-  s.add_dependency 'opal', '>= 0.5.1'
+  s.add_dependency 'opal', '= 0.5.4'
   s.add_dependency 'opal-sprockets', '~> 0.3.0'
 
   s.add_development_dependency 'rake'

opal/opal/rspec/fixes.rb

@@ -1,3 +1,12 @@
+# Opal defines enumerable#flat_map, but doesnt implement it
+module RSpec::Core::FlatMap
+  def flat_map(array)
+    array.map { |item| yield item }.flatten
+  end
+
+  module_function :flat_map
+end
+
 # String#<< is not supported by Opal
 module RSpec::Expectations
   def self.fail_with(message, expected = nil, actual = nil)