6 files changed, 116 insertions, 0 deletions
diff --git a/spec/ruby/library/weakref/__getobj___spec.rb b/spec/ruby/library/weakref/__getobj___spec.rb
new file mode 100644
index 0000000000..fa507384c2
--- /dev/null
+++ b/spec/ruby/library/weakref/__getobj___spec.rb
@@ -0,0 +1,17 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "WeakRef#__getobj__" do
+  it "returns the object if it is reachable" do
+    obj = Object.new
+    ref = WeakRef.new(obj)
+    ref.__getobj__.should.equal?(obj)
+  end
+
+  it "raises WeakRef::RefError if the object is no longer reachable" do
+    ref = WeakRefSpec.make_dead_weakref
+    -> {
+      ref.__getobj__
+    }.should.raise(WeakRef::RefError)
+  end
+end
diff --git a/spec/ruby/library/weakref/allocate_spec.rb b/spec/ruby/library/weakref/allocate_spec.rb
new file mode 100644
index 0000000000..0438d093c4
--- /dev/null
+++ b/spec/ruby/library/weakref/allocate_spec.rb
@@ -0,0 +1,8 @@
+require_relative '../../spec_helper'
+require 'weakref'
+
+describe "WeakRef#allocate" do
+  it "assigns nil as the reference" do
+    -> { WeakRef.allocate.__getobj__ }.should.raise(WeakRef::RefError)
+  end
+end
diff --git a/spec/ruby/library/weakref/fixtures/classes.rb b/spec/ruby/library/weakref/fixtures/classes.rb
new file mode 100644
index 0000000000..041afab14d
--- /dev/null
+++ b/spec/ruby/library/weakref/fixtures/classes.rb
@@ -0,0 +1,26 @@
+require 'weakref'
+
+# From MRI test_weakref.rb
+class WeakRefSpec
+  def self.make_weakref(level = 10)
+    if level > 0
+      make_weakref(level - 1)
+    else
+      WeakRef.new(Object.new)
+    end
+  end
+
+  def self.make_dead_weakref
+    weaks = []
+    weak = nil
+    1000.times do
+      weaks << make_weakref
+    end
+
+    1000.times do
+      GC.start
+      break if weak = weaks.find { |w| !w.weakref_alive? }
+    end
+    weak
+  end
+end
diff --git a/spec/ruby/library/weakref/new_spec.rb b/spec/ruby/library/weakref/new_spec.rb
new file mode 100644
index 0000000000..6290e61fe3
--- /dev/null
+++ b/spec/ruby/library/weakref/new_spec.rb
@@ -0,0 +1,13 @@
+require_relative '../../spec_helper'
+require 'weakref'
+
+describe "WeakRef#new" do
+  it "creates a subclass correctly" do
+    wr2 = Class.new(WeakRef) {
+      def __getobj__
+        :dummy
+      end
+    }
+    wr2.new(Object.new).__getobj__.should == :dummy
+  end
+end
diff --git a/spec/ruby/library/weakref/send_spec.rb b/spec/ruby/library/weakref/send_spec.rb
new file mode 100644
index 0000000000..da8660066f
--- /dev/null
+++ b/spec/ruby/library/weakref/send_spec.rb
@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+require 'weakref'
+
+describe "WeakRef#__send__" do
+  module WeakRefSpecs
+    class << self
+      def delegated_method
+        :result
+      end
+
+      def protected_method
+        :result
+      end
+      protected :protected_method
+
+      def private_method
+        :result
+      end
+      private :private_method
+    end
+  end
+
+  it "delegates to public methods of the weakly-referenced object" do
+    wr = WeakRef.new(WeakRefSpecs)
+    wr.delegated_method.should == :result
+  end
+
+  it "delegates to protected methods of the weakly-referenced object" do
+    wr = WeakRef.new(WeakRefSpecs)
+    -> { wr.protected_method }.should.raise(NameError)
+  end
+
+  it "does not delegate to private methods of the weakly-referenced object" do
+    wr = WeakRef.new(WeakRefSpecs)
+    -> { wr.private_method }.should.raise(NameError)
+  end
+end
diff --git a/spec/ruby/library/weakref/weakref_alive_spec.rb b/spec/ruby/library/weakref/weakref_alive_spec.rb
new file mode 100644
index 0000000000..1b12ffbbec
--- /dev/null
+++ b/spec/ruby/library/weakref/weakref_alive_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "WeakRef#weakref_alive?" do
+  it "returns true if the object is reachable" do
+    obj = Object.new
+    ref = WeakRef.new(obj)
+    ref.weakref_alive?.should == true
+  end
+
+  it "returns a falsy value if the object is no longer reachable" do
+    ref = WeakRefSpec.make_dead_weakref
+    [false, nil].should.include?(ref.weakref_alive?)
+  end
+end