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-rw-r--r--activesupport/test/core_ext/time_ext_test.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/time_ext_test.rb b/activesupport/test/core_ext/time_ext_test.rb
index ca58cd0a8a..60649e4c76 100644
--- a/activesupport/test/core_ext/time_ext_test.rb
+++ b/activesupport/test/core_ext/time_ext_test.rb
@@ -161,4 +161,8 @@ class TimeExtCalculationsTest < Test::Unit::TestCase
def test_next_month_on_31st
assert_equal Time.local(2005, 9, 30), Time.local(2005, 8, 31).next_month
end
+
+ def test_last_month_on_31st
+ assert_equal Time.local(2004, 2, 29), Time.local(2004, 3, 31).last_month
+ end
end