1 files changed, 51 insertions, 0 deletions
diff --git a/spec/ruby/core/unboundmethod/bind_spec.rb b/spec/ruby/core/unboundmethod/bind_spec.rb
new file mode 100644
index 0000000000..3f7a7bf3ac
--- /dev/null
+++ b/spec/ruby/core/unboundmethod/bind_spec.rb
@@ -0,0 +1,51 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "UnboundMethod#bind" do
+  before :each do
+    @normal_um = UnboundMethodSpecs::Methods.new.method(:foo).unbind
+    @parent_um = UnboundMethodSpecs::Parent.new.method(:foo).unbind
+    @child1_um = UnboundMethodSpecs::Child1.new.method(:foo).unbind
+    @child2_um = UnboundMethodSpecs::Child2.new.method(:foo).unbind
+  end
+
+  it "raises TypeError if object is not kind_of? the Module the method defined in" do
+    lambda { @normal_um.bind(UnboundMethodSpecs::B.new) }.should raise_error(TypeError)
+  end
+
+  it "returns Method for any object that is kind_of? the Module method was extracted from" do
+    @normal_um.bind(UnboundMethodSpecs::Methods.new).should be_kind_of(Method)
+  end
+
+  it "returns Method on any object when UnboundMethod is unbound from a module" do
+    UnboundMethodSpecs::Mod.instance_method(:from_mod).bind(Object.new).should be_kind_of(Method)
+  end
+
+  it "returns Method returned for obj is equal to one directly returned by obj.method" do
+    obj = UnboundMethodSpecs::Methods.new
+    @normal_um.bind(obj).should == obj.method(:foo)
+  end
+
+  it "returns a callable method" do
+    obj = UnboundMethodSpecs::Methods.new
+    @normal_um.bind(obj).call.should == obj.foo
+  end
+
+  it "binds a Parent's class method to any Child's class methods" do
+    m = UnboundMethodSpecs::Parent.method(:class_method).unbind.bind(UnboundMethodSpecs::Child1)
+    m.should be_an_instance_of(Method)
+    m.call.should == "I am UnboundMethodSpecs::Child1"
+  end
+
+  it "will raise when binding a an object singleton's method to another object" do
+    other = UnboundMethodSpecs::Parent.new
+    p = UnboundMethodSpecs::Parent.new
+    class << p
+      def singleton_method
+        :single
+      end
+    end
+    um = p.method(:singleton_method).unbind
+    lambda{ um.bind(other) }.should raise_error(TypeError)
+  end
+end