Update matchers to be compatible with RSpec 3 (#6)

Author: cgunther

lib/rspec-rails-caching/matchers/base.rb

@@ -13,16 +13,16 @@ def self.caching_matcher name, &block
           "#{cache_or_expire} #{expected.inspect}"
         end
 
-        failure_message_for_should_not do |actual|
+        failure_message_when_negated do |actual|
           "Expected #{controller.class} not to #{cache_or_expire} #{expected.inspect} but got #{cache_results.inspect}"
         end
 
-        failure_message_for_should do |actual|
+        failure_message do |actual|
           "Expected #{controller.class} to #{cache_or_expire} #{expected.inspect} but got #{cache_results.inspect}"
         end
 
-        def controller
-          matcher_execution_context.controller
+        def supports_block_expectations?
+          true
         end
 
         def cache_store
@@ -37,7 +37,7 @@ def cache_or_expire
           fail NoMethodError, "Abstract method 'cache_or_expire' to be defined in matcher"
         end
 
-        instance_eval &block
+        module_eval &block
 
       end
     end

rspec-rails-caching.gemspec

@@ -13,8 +13,8 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version = Gem::Requirement.new(">= 2.0.0")
 
   gem.add_dependency "rails", ">=3.0.0"
-  gem.add_dependency "rspec", ">=2.8.0"
-  gem.add_dependency "rspec-rails", ">=2.10.0"
+  gem.add_dependency "rspec", ">=3.0.0"
+  gem.add_dependency "rspec-rails", ">=3.0.0"
 
   gem.files         = `git ls-files`.split($\)
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})