Test that #fresh_when accepts an array

https://github.com/rails/etagger/pull/3

actionpack/test/controller/render_test.rb

@@ -32,6 +32,10 @@ class TestControllerWithExtraEtags < ActionController::Base
   def fresh
     render text: "stale" if stale?(etag: '123')
   end
+
+  def array
+    render text: "stale" if stale?(etag: %w(1 2 3))
+  end
 end
 
 class TestController < ActionController::Base
@@ -1649,7 +1653,6 @@ class LastModifiedRenderTest < ActionController::TestCase
     assert_equal @last_modified, @response.headers['Last-Modified']
   end
 
-
   def test_request_with_bang_gets_last_modified
     get :conditional_hello_with_bangs
     assert_equal @last_modified, @response.headers['Last-Modified']
@@ -1678,7 +1681,7 @@ class EtagRenderTest < ActionController::TestCase
   end
 
   def test_multiple_etags
-    @request.if_none_match = %("#{Digest::MD5.hexdigest(ActiveSupport::Cache.expand_cache_key([ "123", 'ab', :cde, [:f] ]))}")
+    @request.if_none_match = etag(["123", 'ab', :cde, [:f]])
     get :fresh
     assert_response :not_modified
 
@@ -1686,6 +1689,20 @@ class EtagRenderTest < ActionController::TestCase
     get :fresh
     assert_response :success
   end
+
+  def test_array
+    @request.if_none_match = etag([%w(1 2 3), 'ab', :cde, [:f]])
+    get :array
+    assert_response :not_modified
+
+    @request.if_none_match = %("nomatch")
+    get :array
+    assert_response :success
+  end
+
+  def etag(record)
+    Digest::MD5.hexdigest(ActiveSupport::Cache.expand_cache_key(record)).inspect
+  end
 end