diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | test/ruby/test_basicinstructions.rb | 22 |
2 files changed, 31 insertions, 0 deletions
@@ -1,3 +1,12 @@ +Wed Apr 13 12:00:08 2016 Koichi Sasada <ko1@atdot.net> + + * 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 <spiketeika@gmail.com> * 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 |