Improve check_box_checked? to use include? for Array values. [#193 state:resolved]

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

actionpack/lib/action_view/helpers/form_helper.rb

@@ -616,6 +616,8 @@ def check_box_checked?(value, checked_value)
             value != 0
           when String
             value == checked_value
+          when Array
+            value.include?(checked_value)
           else
             value.to_i != 0
           end

actionpack/test/template/form_helper_test.rb

@@ -181,6 +181,17 @@ def test_check_box
       '<input checked="checked" id="post_secret" name="post[secret]" type="checkbox" value="1" /><input name="post[secret]" type="hidden" value="0" />',
       check_box("post", "secret?")
     )
+
+    @post.secret = ['0']
+    assert_dom_equal(
+      '<input id="post_secret" name="post[secret]" type="checkbox" value="1" /><input name="post[secret]" type="hidden" value="0" />',
+      check_box("post", "secret")
+    )
+    @post.secret = ['1']
+    assert_dom_equal(
+      '<input checked="checked" id="post_secret" name="post[secret]" type="checkbox" value="1" /><input name="post[secret]" type="hidden" value="0" />',
+      check_box("post", "secret")
+    )
   end
 
   def test_check_box_with_explicit_checked_and_unchecked_values