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-rw-r--r--activesupport/test/core_ext/duration_test.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/duration_test.rb b/activesupport/test/core_ext/duration_test.rb
index 328521bdb5..31af3c4521 100644
--- a/activesupport/test/core_ext/duration_test.rb
+++ b/activesupport/test/core_ext/duration_test.rb
@@ -162,6 +162,10 @@ class DurationTest < ActiveSupport::TestCase
assert_equal counter, 60
end
+ def test_as_json
+ assert_equal 172800, 2.days.as_json
+ end
+
def test_to_json
assert_equal '172800', 2.days.to_json
end