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-rw-r--r--test/date/test_date.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/test/date/test_date.rb b/test/date/test_date.rb
index 3ae22633ec..8cadb23420 100644
--- a/test/date/test_date.rb
+++ b/test/date/test_date.rb
@@ -36,6 +36,11 @@ class TestDate < Test::Unit::TestCase
dt = DateTimeSub.new
assert_instance_of(DateSub, d)
+ assert_instance_of(DateTimeSub, dt)
+
+ assert_instance_of(DateSub, DateSub.today)
+ assert_instance_of(DateTimeSub, DateTimeSub.now)
+
assert_equal('#<DateSub: -1/2,0,2299161>', d.inspect)
assert_equal('-4712-01-01', d.to_s)
assert_equal('-4712-01-01T00:00:00+00:00', dt.to_s)