Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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