Add negative position tests [Bug #18138]

1 files changed, 4 insertions, 0 deletions

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index 78e497d345..59e1ad463c 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -1576,6 +1576,8 @@ class TestArray < Test::Unit::TestCase
 
     assert_nil(a.slice(10, -3))
     assert_equal @cls[], a.slice(10..7)
+
+    assert_equal([100], a.slice(-1, 1_000_000_000))
   end
 
   def test_slice!
@@ -1635,6 +1637,8 @@ class TestArray < Test::Unit::TestCase
 
     assert_nil(a.clone.slice!(10, -3))
     assert_equal @cls[], a.clone.slice!(10..7)
+
+    assert_equal([100], a.clone.slice!(-1, 1_000_000_000))
   end
 
   def test_sort