Merge pull request #37839 from ttanimichi/modify-inspect-of-activesupport-duration-with-no-parts

The return value of `ActiveSupport::Duration#inspect` is wrong when its parts are empty

activesupport/lib/active_support/duration.rb

@@ -375,7 +375,7 @@ def ago(time = ::Time.current)
     alias :before :ago
 
     def inspect #:nodoc:
-      return "0 seconds" if parts.empty?
+      return "#{value} seconds" if parts.empty?
 
       parts.
         sort_by { |unit,  _ | PARTS.index(unit) }.

activesupport/test/core_ext/duration_test.rb

@@ -74,6 +74,7 @@ def test_inspect
     assert_equal "2 weeks",                         1.fortnight.inspect
     assert_equal "0 seconds",                       (10 % 5.seconds).inspect
     assert_equal "10 minutes",                      (10.minutes + 0.seconds).inspect
+    assert_equal "3600 seconds",                    (1.day / 24).inspect
   end
 
   def test_inspect_locale