1 files changed, 13 insertions, 0 deletions
diff --git a/test/date/test_date_arith.rb b/test/date/test_date_arith.rb
index 96622ba065..d0d27d72f7 100644
--- a/test/date/test_date_arith.rb
+++ b/test/date/test_date_arith.rb
@@ -262,4 +262,17 @@ class TestDateArith < Test::Unit::TestCase
     assert_equal(8, e.to_a.size)
   end
 
+  def test_step__compare
+    o = Object.new
+    def o.<=>(*);end
+    assert_raise(ArgumentError) {
+      Date.new(2000, 1, 1).step(3, o).to_a
+    }
+
+    o = Object.new
+    def o.<=>(*);2;end
+    a = []
+    Date.new(2000, 1, 1).step(3, o) {|d| a << d}
+    assert_empty(a)
+  end
 end