test new optimizations for redefines

* test/ruby/test_optimization.rb (test_string_freeze): new test
  (test_hash_aref_with): ditto
  (test_hash_aset_with): ditto

Our new (in 2.2) optimizations must not trigger when redefined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47911 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Tue Oct 14 10:19:10 2014  Eric Wong  <e@80x24.org>
+
+	* test/ruby/test_optimization.rb (test_string_freeze): new test
+	  (test_hash_aref_with): ditto
+	  (test_hash_aset_with): ditto
+
 Tue Oct 14 01:27:54 2014  Tanaka Akira  <akr@fsij.org>
 
 	* enum.c (nmin_run): max(n) and max_by(n) returns an array in

test/ruby/test_optimization.rb

@@ -111,6 +111,11 @@ class TestRubyOptimization < Test::Unit::TestCase
     assert_redefine_method('String', '%', 'assert_equal 2, "%d" % 2')
   end
 
+  def test_string_freeze
+    assert_equal "foo", "foo".freeze
+    assert_redefine_method('String', 'freeze', 'assert_nil "foo".freeze')
+  end
+
   def test_array_plus
     assert_equal [1,2], [1]+[2]
     assert_redefine_method('Array', '+', 'assert_equal [2], [1]+[2]')
@@ -145,6 +150,25 @@ class TestRubyOptimization < Test::Unit::TestCase
     assert_redefine_method('Hash', 'empty?', 'assert_nil({}.empty?); assert_nil({1=>1}.empty?)')
   end
 
+  def test_hash_aref_with
+    h = { "foo" => 1 }
+    assert_equal 1, h["foo"]
+    assert_redefine_method('Hash', '[]', <<-end)
+      h = { "foo" => 1 }
+      assert_equal "foo", h["foo"]
+    end
+  end
+
+  def test_hash_aset_with
+    h = {}
+    assert_equal 1, h["foo"] = 1
+    assert_redefine_method('Hash', '[]=', <<-end)
+      h = {}
+      h["foo"] = 1
+      assert_nil h["foo"]
+    end
+  end
+
   class MyObj
     def ==(other)
       true