Add documentation and tests for keyword argument value omission

[Feature #14579]

1 files changed, 16 insertions, 0 deletions

diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index c8191a722c..a899934ed6 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -4351,4 +4351,20 @@ class TestKeywordArgumentsSymProcRefinements < Test::Unit::TestCase
     assert_raise(TypeError, bug16603) { p(**42) }
     assert_raise(TypeError, bug16603) { p(k:1, **42) }
   end
+
+  def test_value_omission
+    f = ->(**kwargs) { kwargs }
+    x = 1
+    y = 2
+    assert_equal({x: 1, y: 2}, f.call(x:, y:))
+    assert_equal({one: 1, two: 2}, f.call(one:, two:))
+  end
+
+  private def one
+    1
+  end
+
+  private def two
+    2
+  end
 end