# Assumes the following have been defined
# let(:model) -- with a model initializer that calls init_options
# let(:property_name)
# let(:property_value)
# let(:default_value)
shared_examples_for 'a modelish property' do
  subject { model }

  let(:init_options) { {property_name => property_value} }

  it { should respond_to(property_name) }

  describe "getter" do
    subject { model.send(property_name) }

    context "without init options" do
      let(:init_options) { nil }

      it { should == default_value }
    end

    context "with init options" do
      it { should == property_value }
    end
  end

  it { should respond_to("#{property_name}=".to_sym) }

  describe "setter" do
    subject { model.send("#{property_name}=", new_property_value) }

    let(:new_property_value) { 'a new value' }

    it "should change the property value" do
      expect { subject }.to change{model.send(property_name)}.from(property_value).to(new_property_value)
    end
  end
end