Test suite being updated to deal with mocha

This commit will remove a test that is no longer compatible with the new version of mocha.

The previous versions of mocha would incorrectly leave "fragment_name_with_digest" as a visible method.
In the new version, this method is removed for versions of rails 4 and above.

Author: Charlie Egan and Elena Tanasoiu

gemfiles/rails_5_0.gemfile

@@ -6,8 +6,8 @@ gem "rake"
 gem "mocha", :require => false
 gem "appraisal"
 gem "pry"
-gem "railties", ">= 5.0.0.beta2", "< 5.1"
-gem "actionpack", ">= 5.0.0.beta2", "< 5.1"
-gem "activemodel", ">= 5.0.0.beta2", "< 5.1"
+gem "railties", "~> 5.0.0"
+gem "actionpack", "~> 5.0.0"
+gem "activemodel", "~> 5.0.0"
 
 gemspec :path => "../"

test/jbuilder_template_test.rb

@@ -307,18 +307,6 @@ def assert_collection_rendered(result, context = nil)
     assert_equal %w[a b c], result
   end
 
-  test "fragment caching works with previous version of cache digests" do
-    undef_context_methods :cache_fragment_name
-
-    @context.expects :fragment_name_with_digest
-
-    jbuild <<-JBUILDER
-      json.cache! "cachekey" do
-        json.name "Cache"
-      end
-    JBUILDER
-  end
-
   test "fragment caching works with current cache digests" do
     undef_context_methods :fragment_name_with_digest