`assert_template` no more passing with what ever string that matches.

Given Im rendering an template `/layout/hello.html.erb`, assert_template was
passing with any string that matches. This behavior allowed false passing like:

	assert_template "layout"
	assert_template "out/hello"

Now the passing possibilities are:

	assert_template "layout/hello"
	assert_template "hello"

fixing assert_template bug when template matches expected, but not ends with

Cherry Pick Merge: Fixes issue #3849 assert_template false positive

taking redundant test off

prevening incorrect assert_template when rendering with repeated names in path

updating CHANGELOG with bugfix: assert_template false passing

1 files changed, 12 insertions, 5 deletions

diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index 0caeef3192..34974f5149 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -86,16 +86,23 @@ module ActionController
       response.body
 
       case options
-      when NilClass, String, Symbol, Regexp
+      when NilClass, Regexp, String, Symbol
         options = options.to_s if Symbol === options
         rendered = @templates
         msg = message || sprintf("expecting <%s> but rendering with <%s>",
                 options.inspect, rendered.keys)
-        matches_template =
-          if options
+        matches_template = 
+          case options
+          when String
+            rendered.any? do |t, num|
+              options_splited = options.split(File::SEPARATOR)
+              t_splited = t.split(File::SEPARATOR)
+              t_splited.last(options_splited.size) == options_splited
+            end
+          when Regexp
             rendered.any? { |t,num| t.match(options) }
-          else
-            @templates.blank?
+          when NilClass
+            rendered.blank?
           end
         assert matches_template, msg
       when Hash