dummyparser.rb: on_rescue

* test/ripper/dummyparser.rb (on_rescue): add to turn exception
  class list into NodeList, to test exception class list.

* test/ripper/test_parser_events.rb (test_rescue_class): add
  missing test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48537 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ripper/dummyparser.rb

@@ -26,8 +26,8 @@ class Node
 end
 
 class NodeList
-  def initialize
-    @list = []
+  def initialize(list = [])
+    @list = list
   end
 
   attr_reader :list
@@ -208,6 +208,10 @@ class DummyParser < Ripper
     words.push word
   end
 
+  def on_rescue(exc, *rest)
+    Node.new('rescue', (exc && NodeList.new(exc)), *rest)
+  end
+
   (Ripper::PARSER_EVENTS.map(&:to_s) - instance_methods(false).map {|n|n.to_s.sub(/^on_/, '')}).each do |event|
     define_method(:"on_#{event}") do |*args|
       Node.new(event, *args)

test/ripper/test_parser_events.rb

@@ -842,6 +842,14 @@ class TestRipper::ParserEvents < Test::Unit::TestCase
     assert_match(/rescue\(,var_field\(e\),\[2\]\)/, parsed)
   end
 
+  def test_rescue_class
+    thru_rescue = false
+    parsed = parse('begin; 1; rescue RuntimeError => e; 2; end', :on_rescue) {thru_rescue = true}
+    assert_equal true, thru_rescue
+    assert_match(/1.*rescue/, parsed)
+    assert_match(/rescue\(\[ref\(RuntimeError\)\],var_field\(e\),\[2\]\)/, parsed)
+  end
+
   def test_rescue_mod
     thru_rescue_mod = false
     parsed = parse('1 rescue 2', :on_rescue_mod) {thru_rescue_mod = true}