module KernelSpecs
  class EvalTest
    def self.yield_from_eval
      eval("yield", binding)
    end
  end
end

describe "Kernel.eval" do
  it "yields to the provided block when evaling 'yield'" do
    i = 0;
    (eval('yield') { i += 1 }).should == 1
    (eval('yield') { i += 1 }).should == 2

    i = 0;
    (eval('yield; yield; yield') { i += 1 }).should == 3

    var = "test"
    (eval('yield') { var }).should == "test"
  end

  it "does not yield to the provided block when evaling 'yield' when scope argument is present" do
    lambda {
      eval('yield', binding) { "vvs" }
    }.should raise_error(LocalJumpError)
  end

  it "yields to the block captured by binding" do
    KernelSpecs::EvalTest.yield_from_eval { "vvs" }.should == "vvs"
  end

  it "does not pass the block to the method being eval'ed" do
    lambda {
      eval('KernelSpecs::EvalTest.yield_from_eval') { "vvs" }
    }.should raise_error(LocalJumpError)
  end
end