1 files changed, 16 insertions, 0 deletions
diff --git a/test/t/range.rb b/test/t/range.rb
index 5aee4d5cc..64e7f9d9f 100644
--- a/test/t/range.rb
+++ b/test/t/range.rb
@@ -93,3 +93,19 @@ assert('Range#eql?', '15.2.14.4.14') do
   assert_false (1..10).eql? (Range.new(1.0, 10.0))
   assert_false (1..10).eql? "1..10"
 end
+
+assert('Range#initialize_copy', '15.2.14.4.15') do
+  assert_raise(NameError) { (0..1).__send__(:initialize_copy, 1..3) }
+end
+
+assert('Range#dup') do
+  r = (1..3).dup
+  assert_equal r.begin, 1
+  assert_equal r.end, 3
+  assert_false r.exclude_end?
+
+  r = ("a"..."z").dup
+  assert_equal r.begin, "a"
+  assert_equal r.end, "z"
+  assert_true r.exclude_end?
+end