ripper: Check if anonymous parameters defined [Bug #18828]

1 files changed, 38 insertions, 0 deletions

diff --git a/test/ripper/test_parser_events.rb b/test/ripper/test_parser_events.rb
index 5bb8f120f2..1ea8d23378 100644
--- a/test/ripper/test_parser_events.rb
+++ b/test/ripper/test_parser_events.rb
@@ -155,6 +155,44 @@ class TestRipper::ParserEvents < Test::Unit::TestCase
     end
   end
 
+  def test_anonymous_block_forwarding
+    thru_args_add_block = false
+    parse('def b(&); c(&); end', :on_args_add_block) {thru_args_add_block = true}
+    assert_equal true, thru_args_add_block
+    assert_match "no anonymous block parameter", compile_error('def b; c(&); end')
+  end
+
+  def test_anonymous_rest_forwarding
+    [
+      'c(*)',
+      'c(*, *)',
+    ].each do |code|
+      thru_args_add_star = false
+      src = "def b(*); #{code} end"
+      parse(src, :on_args_add_star) {thru_args_add_star = true}
+      assert_equal true, thru_args_add_star, src
+
+      src = "def b; #{code} end"
+      assert_match "no anonymous rest parameter", compile_error(src), src
+    end
+  end
+
+  def test_anonymous_keyword_rest_forwarding
+    [
+      'c(**)',
+      'c(k: 1, **)',
+      'c(**, k: 1)',
+    ].each do |code|
+      thru_assoc_splat = false
+      src = "def b(**); #{code} end"
+      parse(src, :on_assoc_splat) {thru_assoc_splat = true}
+      assert_equal true, thru_assoc_splat, src
+
+      src = "def b; #{code} end"
+      assert_match "no anonymous keyword rest parameter", compile_error(src), src
+    end
+  end
+
   def test_arg_paren
     # FIXME
   end