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-rw-r--r--activesupport/test/core_ext/hash_ext_test.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index cd0cb1a144..f18172a5ce 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -659,6 +659,14 @@ class HashExtTest < ActiveSupport::TestCase
assert_equal 1, h['first']
end
+ def test_to_options_on_indifferent_preserves_works_as_hash_with_dup
+ h = HashWithIndifferentAccess.new({ a: { b: 'b' } })
+ dup = h.dup
+
+ dup[:a][:c] = 'c'
+ assert_equal 'c', h[:a][:c]
+ end
+
def test_indifferent_sub_hashes
h = {'user' => {'id' => 5}}.with_indifferent_access
['user', :user].each {|user| [:id, 'id'].each {|id| assert_equal 5, h[user][id], "h[#{user.inspect}][#{id.inspect}] should be 5"}}