Implement WeakMap using weak references

1 files changed, 13 insertions, 1 deletions

diff --git a/test/ruby/test_weakmap.rb b/test/ruby/test_weakmap.rb
index 6b3dc678ad..b42787ad5e 100644
--- a/test/ruby/test_weakmap.rb
+++ b/test/ruby/test_weakmap.rb
@@ -193,9 +193,10 @@ class TestWeakMap < Test::Unit::TestCase
     end;
   end
 
-  def test_compaction_bug_19529
+  def test_compaction
     omit "compaction is not supported on this platform" unless GC.respond_to?(:compact)
 
+    # [Bug #19529]
     obj = Object.new
     100.times do |i|
       GC.compact
@@ -211,6 +212,17 @@ class TestWeakMap < Test::Unit::TestCase
       end
       GC.compact
     end;
+
+    assert_separately(%w(-robjspace), <<-'end;')
+      wm = ObjectSpace::WeakMap.new
+      key = Object.new
+      val = Object.new
+      wm[key] = val
+
+      GC.verify_compaction_references(expand_heap: true, toward: :empty)
+
+      assert_equal(val, wm[key])
+    end;
   end
 
   def test_replaced_values_bug_19531