1 files changed, 26 insertions, 0 deletions
diff --git a/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb b/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb
new file mode 100644
index 0000000000..798a2e2cda
--- /dev/null
+++ b/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb
@@ -0,0 +1,26 @@
+require_relative '../../../spec_helper'
+
+describe "ObjectSpace::WeakKeyMap#getkey" do
+  it "returns the existing equal key" do
+    map = ObjectSpace::WeakKeyMap.new
+    key1, key2 = %w[a a].map(&:upcase)
+
+    map[key1] = true
+    map.getkey(key2).should.equal?(key1)
+    map.getkey("X").should == nil
+
+    key1.should == "A" # keep the key alive until here to keep the map entry
+    key2.should == "A" # keep the key alive until here to keep the map entry
+  end
+
+  it "returns nil when a key cannot be garbage collected" do
+    map = ObjectSpace::WeakKeyMap.new
+
+    map.getkey(1).should == nil
+    map.getkey(1.0).should == nil
+    map.getkey(:a).should == nil
+    map.getkey(true).should == nil
+    map.getkey(false).should == nil
+    map.getkey(nil).should == nil
+  end
+end