require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Binding#local_variable_get" do
  it "reads local variables captured in the binding" do
    a = 42
    bind = binding
    bind.local_variable_get(:a).should == 42
  end

  it "raises a NameError for missing variables" do
    bind = BindingSpecs::Demo.new(1).get_empty_binding

    -> {
      bind.local_variable_get(:no_such_variable)
    }.should.raise(NameError)
  end

  it "reads variables added later to the binding" do
    bind = BindingSpecs::Demo.new(1).get_empty_binding

    -> {
      bind.local_variable_get(:a)
    }.should.raise(NameError)

    bind.local_variable_set(:a, 42)

    bind.local_variable_get(:a).should == 42
  end

  it 'gets a local variable defined in a parent scope' do
    number = 10

    -> {
      binding.local_variable_get(:number)
    }.call.should == 10
  end

  it 'gets a local variable defined using eval()' do
    bind = binding
    bind.eval('number = 10')

    bind.local_variable_get(:number).should == 10
  end

  it "raises a NameError on global access" do
    bind = binding
    -> { bind.local_variable_get(:$0) }.should.raise(NameError)
  end

  it "raises a NameError on special variable access" do
    bind = binding
    -> { bind.local_variable_get(:$~) }.should.raise(NameError)
    -> { bind.local_variable_get(:$_) }.should.raise(NameError)
  end

  it 'raises a TypeError when given non-String/Symbol as the variable name' do
    -> {
      binding.local_variable_get(1)
    }.should.raise(TypeError, '1 is not a symbol nor a string')
  end
end
