1 files changed, 23 insertions, 0 deletions
diff --git a/test/ruby/test_comparable.rb b/test/ruby/test_comparable.rb
index 4f1d38a7e6..c363a03a64 100644
--- a/test/ruby/test_comparable.rb
+++ b/test/ruby/test_comparable.rb
@@ -90,6 +90,29 @@ class TestComparable < Test::Unit::TestCase
     }
   end
 
+  def test_clamp_with_range
+    cmp->(x) do 0 <=> x end
+    assert_equal(1, @o.clamp(1..2))
+    assert_equal(-1, @o.clamp(-2..-1))
+    assert_equal(@o, @o.clamp(-1..3))
+
+    assert_equal(1, @o.clamp(1..1))
+    assert_equal(@o, @o.clamp(0..0))
+
+    assert_raise_with_message(ArgumentError, 'cannot clamp with an exclusive range') {
+      @o.clamp(1...2)
+    }
+    assert_raise_with_message(ArgumentError, 'cannot clamp with an exclusive range') {
+      @o.clamp(1...)
+    }
+    assert_raise_with_message(ArgumentError, 'cannot clamp with an exclusive range') {
+      @o.clamp(...2)
+    }
+    assert_raise_with_message(ArgumentError, 'min argument must be smaller than max argument') {
+      @o.clamp(2..1)
+    }
+  end
+
   def test_err
     assert_raise(ArgumentError) { 1.0 < nil }
     assert_raise(ArgumentError) { 1.0 < Object.new }