diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/ruby/test_optimization.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb index 2d0eec02fd..0d14c9c932 100644 --- a/test/ruby/test_optimization.rb +++ b/test/ruby/test_optimization.rb @@ -181,6 +181,37 @@ class TestRubyOptimization < Test::Unit::TestCase assert_redefine_method('Hash', 'empty?', 'assert_nil({}.empty?); assert_nil({1=>1}.empty?)') end + def test_hash_reuse_fstring + embed = -'h e l l o' + shared = -'this string is too long to be embedded and should be shared' + assert_not_equal GC::INTERNAL_CONSTANTS[:RVALUE_SIZE], + ObjectSpace.memsize_of(shared), + 'update this test if string embedding changed' + + [ embed, shared ].each do |exp| + key = exp.split(' ').join(' ') + h = {} + h[key] = true + assert_not_same key, h.keys[0] + assert_predicate h.keys[0], :frozen? + assert_same exp, h.keys[0] + + h1 = {} + h2 = {} + key.taint + h1[key] = true + h2[key] = true + k1 = h1.keys[0] + k2 = h2.keys[0] + assert_same k1, k2 + assert_predicate k1, :tainted? + + assert_equal GC::INTERNAL_CONSTANTS[:RVALUE_SIZE], + ObjectSpace.memsize_of(k1), + 'tainted string should share with untainted fstring' + end + end + def test_hash_aref_with h = { "foo" => 1 } assert_equal 1, h["foo"] |