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-rw-r--r--activesupport/test/core_ext/hash_ext_test.rb12
1 files changed, 12 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index 7cfe7b0ea7..6746b58cd3 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -428,6 +428,18 @@ class HashExtTest < ActiveSupport::TestCase
assert_equal 2, hash['b']
end
+ def test_indifferent_replace
+ hash = HashWithIndifferentAccess.new
+ hash[:a] = 42
+
+ replaced = hash.replace(b: 12)
+
+ assert hash.key?('b')
+ assert !hash.key?(:a)
+ assert_equal 12, hash[:b]
+ assert_same hash, replaced
+ end
+
def test_indifferent_merging_with_block
hash = HashWithIndifferentAccess.new
hash[:a] = 1