using Calculator.Domain;
using Calculator.Presentation.Commands;
using Calculator.Presentation.Views;
using MbUnit.Framework;
using Rhino.Mocks;

namespace Calculator.Test.presentation.commands {
	[TestFixture]
	public class RefreshTotalCommandTest {
		[SetUp]
		public void SetUp() {
			mockery = new MockRepository( );
			calculation = mockery.DynamicMock< ICurrentCalculation >( );
			view = mockery.DynamicMock< ICalculatorView >( );
		}

		private IRefreshTotalCommand CreateSUT() {
			return new RefreshTotalCommand( view, calculation );
		}

		[Test]
		public void should_leverage_calculator_to_compute_the_current_total() {
			var newTotal = mockery.DynamicMock< INumber >( );
			using ( mockery.Record( ) ) {
				Expect.Call( calculation.IsEqualTo( ) ).Return( newTotal ).Repeat.AtLeastOnce( );
			}

			using ( mockery.Playback( ) ) {
				CreateSUT( ).Execute( );
			}
		}

		[Test]
		public void should_display_the_new_total_on_the_view() {
			var newTotal = mockery.DynamicMock< INumber >( );
			using ( mockery.Record( ) ) {
				SetupResult.For( calculation.IsEqualTo( ) ).Return( newTotal ).Repeat.AtLeastOnce( );
				view.Display( newTotal );
			}

			using ( mockery.Playback( ) ) {
				CreateSUT( ).Execute( );
			}
		}

		private ICurrentCalculation calculation;
		private MockRepository mockery;
		private ICalculatorView view;
	}
}