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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
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