From 9d258137458ddabeeeb99882022b4da5c54e645c Mon Sep 17 00:00:00 2001 From: ko1 Date: Wed, 13 Apr 2016 03:03:37 +0000 Subject: * test/ruby/test_basicinstructions.rb: add a test to check access instance variables on special const objects. All of such objects are frozen, so that we can not set instance variables for them. But we can read instance variables and return default value (nil). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54556 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ChangeLog | 9 +++++++++ test/ruby/test_basicinstructions.rb | 22 ++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/ChangeLog b/ChangeLog index 7f39aeed38..995c9eb60a 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +Wed Apr 13 12:00:08 2016 Koichi Sasada + + * test/ruby/test_basicinstructions.rb: add a test to check access + instance variables on special const objects. + + All of such objects are frozen, so that we can not set instance + variables for them. But we can read instance variables and return + default value (nil). + Tue Apr 12 20:40:35 2016 Kaneko Yuichiro * ext/date/date_core.c (time_to_time): should preserve timezone diff --git a/test/ruby/test_basicinstructions.rb b/test/ruby/test_basicinstructions.rb index d13c41c276..c0ce02648d 100644 --- a/test/ruby/test_basicinstructions.rb +++ b/test/ruby/test_basicinstructions.rb @@ -698,4 +698,26 @@ class TestBasicInstructions < Test::Unit::TestCase assert_equal [], [*a] assert_equal [1], [1, *a] end + + def test_special_const_instance_variables + assert_separately(%w(-W0), <<-INPUT, timeout: 60) + module M + def get + # we can not set instance variables on special const objects. + # However, we can access instance variables with default value (nil). + @ivar + end + end + class Fixnum; include M; end + class Float; include M; end + class Symbol; include M; end + class FalseClass; include M; end + class TrueClass; include M; end + class NilClass; include M; end + + [123, 1.2, :sym, false, true, nil].each{|obj| + assert_equal(nil, obj.get) + } + INPUT + end end -- cgit v1.2.3