describe VarTuple do

  let (:var_tuple) { VarTuple.new ['a'.to_var_name, 'b'.to_var_name, 'c'.to_var_name] }

  it "returns its length" do
    expect(var_tuple.length).to eq(3)
  end

  it "returns a variable at a given index" do
    expect(var_tuple.variable_at(0)).to eq('a'.to_var_name)
    expect(var_tuple.variable_at(1)).to eq('b'.to_var_name)
    expect(var_tuple.variable_at(2)).to eq('c'.to_var_name)

  end

end