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author | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-04-13 03:03:37 +0000 |
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committer | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-04-13 03:03:37 +0000 |
commit | 9d258137458ddabeeeb99882022b4da5c54e645c (patch) | |
tree | a865e953d2ba4a93e946167c479ca6b9c6043691 /test/ruby | |
parent | 182f8d7e2750dfa6d7df8469a41c87c66eb0bd87 (diff) | |
download | ruby-9d258137458ddabeeeb99882022b4da5c54e645c.tar.gz |
* 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
Diffstat (limited to 'test/ruby')
-rw-r--r-- | test/ruby/test_basicinstructions.rb | 22 |
1 files changed, 22 insertions, 0 deletions
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 |