1 files changed, 51 insertions, 0 deletions
diff --git a/spec/rubyspec/core/kernel/binding_spec.rb b/spec/rubyspec/core/kernel/binding_spec.rb
new file mode 100644
index 0000000000..0b33c86d3c
--- /dev/null
+++ b/spec/rubyspec/core/kernel/binding_spec.rb
@@ -0,0 +1,51 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Kernel.binding" do
+  it "returns a binding for the caller" do
+    Kernel.binding.eval("self").should == self
+  end
+end
+
+describe "Kernel#binding" do
+  it "is a private method" do
+    Kernel.should have_private_instance_method(:binding)
+  end
+
+  before :each do
+    @b1 = KernelSpecs::Binding.new(99).get_binding
+    ScratchPad.clear
+  end
+
+  it "returns a Binding object" do
+    @b1.kind_of?(Binding).should == true
+  end
+
+  it "encapsulates the execution context properly" do
+    eval("@secret", @b1).should == 100
+    eval("a", @b1).should == true
+    eval("b", @b1).should == true
+    eval("@@super_secret", @b1).should == "password"
+
+    eval("square(2)", @b1).should == 4
+    eval("self.square(2)", @b1).should == 4
+
+    eval("a = false", @b1)
+    eval("a", @b1).should == false
+  end
+
+  it "raises a NameError on undefined variable" do
+    lambda { eval("a_fake_variable", @b1) }.should raise_error(NameError)
+  end
+
+  it "uses the closure's self as self in the binding" do
+    m = mock(:whatever)
+    eval('self', m.send(:binding)).should == self
+  end
+
+  it "uses the class as self in a Class.new block" do
+    m = mock(:whatever)
+    cls = Class.new { ScratchPad.record eval('self', m.send(:binding)) }
+    ScratchPad.recorded.should == cls
+  end
+end